1 FE Practice Material Josh McCurley 2 Mathematics and Statistics: 1. The roots of F = a. b. c. d. ๐ฅ 3 +6๐ฅ 2 +11๐ฅ+6 ๐ฅ+1 are most nearly: -1, -2, -3 2, -3 -2, -3 2, 3 2. The equation of a sphere with its center at (0,1,-2) and a radius of 9 is: a. x2 + (y-1)2 + (z+2)2 = 81 b. x2 + (y+1)2 + (z-2)2 = 81 c. (x+1)2 + (y+1)2 + (z+2)2 = 81 d. (x+1)2 + (y+1)2 + (z+2)2 = 9 (1−๐)2 3. The term a. b. c. d. (1+๐)2 , where i =√−1, is most nearly: -1 -1 + i 0 1+i 4. Which of the following is a unit vector perpendicular to the plane determined by the vectors A = 2i + 4j and B = i + j - k a. -2i + j – k 1 b. (i + 2j) c. d. √5 1 (-2i + j - k) √6 1 (-2i -j -k) √6 3 5. The following data has been collected: Test 1 2 3 4 5 6 7 8 9 Average Score 85 87 95 90 85 88 90 90 91 Which of the following statements is true? a. b. c. d. The median and mode are equal. The mean and median are equal. The mean and the mode are equal. The mean is larger than both the mode and the median. 6. You have a fair coin that you toss ten times. The probability of getting exactly four heads in ten tosses is most nearly: a. 0.1 b. 0.2 c. 0.4 d. 0.5 7. You throw two 6-sided fair dice. The probability that the sum will be less than 12 is most nearly. a. 0.028 b. 0.083 c. 0.333 d. 0.972 4 8. The only point of inflection on the curve representing the equation y = x3 + x2 -3 is at: 2 a. x = 3 1 b. x = - 3 c. 0 1 d. x = 3 9. A spreadsheet display shows the following values in column A: 1 2 3 4 5 A -2 -1 0 1 2 B Cell B1 contains the formula $A1^3 + A$1^2 – 3. The formula in Cell B1 is copied down in Column B with automatic cell referencing. The formula in Cell B5 will be: a. b. c. d. $A1^3 + A$5^2 – 3 A5^3 + B$1^2 – 3 $A5^3 + A$1^2 – 3 A5^3 + A5^2 – 3 10. The area of the shaded portion of the figure shown below is most nearly: a. b. c. d. 18 39 117 133 5 11. The indefinite integral of x3 – x + 1 is: a. 3x2 -1 + C b. c. d. ๐ฅ4 3 ๐ฅ4 3 ๐ฅ4 4 - ๐ฅ2 2 ๐ฅ2 2 ๐ฅ2 2 +1+C +1 +x+C 4 1 12. The integral ∫2 a. b. 1 ๐๐ฅ equals: 4 3 4 c. d. ๐ฅ2 3 16 5 16 ๐2 ๐ฆ 13. If y = 4x3 +3x2z +5xz2 +6z3 +20, then ( a. b. c. d. ๐๐ฅ 2 )= 12x + 6z 24x + 6z 12x2 +6xz +5z2 24x2 + 6xz + 5z2 14. The water content of a soil volume is measured four times gravimetrically by oven drying. The mean value of the water content is 23.2%. If the standard deviation of the four measurements is 1.0%, the 99% confidence interval for the soil water content is most nearly: a. (18.6%, 27.8%) b. (19.5%, 26.9%) c. (20.6%, 25.8%) d. (20.9%, 25.5%) 15. What is the sample variance of the following numbers: 2,4,6,8,10,12,14? a. 4.32 b. 5.29 c. 8.00 d. 18.70 6 16. You collect 10 observations from an experiment. The sample average is 14.0, and the standard deviation is 5.8. The 90% confidence interval on the mean is: a. 11.57 < µ > 16.43 b. 10.68 < µ > 17.32 c. 8.20 < µ > 19.80 d. 8.78 < µ > 19.22 17. Two students are working independently on a problem. Their respective probabilities of solving that problem are 1/3 and ¾. What is the probability that at least one of them will solve the problem? a. 0.5 b. 0.625 c. 0.4 d. 0.833 18. A coin is flipped, and a 6-sided die thrown. What is the probability of getting heads and a 5 at the same time? a. 0.5 b. 0.33 c. 0.167 d. 0.083 19. What is the length of a line segment with a slope of 4/3, measured from the y-axis to a point (6,4)? a. 10 b. 25 c. 50 d. 75 20. What is the general form of the equation for a line whose x-intercept is 4 and y-intercept is -6? a. 2x – 3y -18 = 0 b. 2x + 3y +18 = 0 c. 3x – 2y -12 = 0 d. 3x + 2y + 12 = 0 7 21. Simplify and evaluate the following expression: a. b. c. d. 0.95 1.33 2.00 2.20 22. For some angle ำฉ, csc(ำฉ) = -8/5. What is cos(2ำฉ)? a. b. c. d. 7/32 1/4 3/8 5/8 23. The expression… … is equivalent to which of the following? a. b. c. d. Sin(x) Cos(x) 1 – sin^2(x) 1 + sin^2(x) 24. What is the value of x (less than 3600) that will satisfy the following equation? a. b. c. d. 450 900 1800 2700 8 25. If the rectangular coordinates of a point are (-3, -5.2), what are its polar coordinates? a. b. c. d. (-6, -1200) (6, -1200) (6, 1200) (6, -1500) 26. Determine the (x,y) coordinates of the center of the circle defined by the following equation? a. b. c. d. (3, 2) (3, 4) (4, 5) (5, 4) 27. What is the slope of the following curve when it crosses the positive part of the x-axis? a. b. c. d. 3/20 1/5 1/3 7 28. What is the maximum value of the following function on the interval x < 0? a. b. c. d. -210 -36 -5 210 9 29. What is the value of the following limit? a. b. c. d. 0 0.87 1 5 30. What is the partial derivative with respect to “x” of the following function? 31. What is the result of the following indefinite integral? 10 32. What is the result of the following indefinite integral? 33. For the three vectors, what is the value of the following product? a. b. c. d. 0 64 80 216 11 34. What is the angle between the two given vectors? 35. What is the determinate of the following matrix? a. b. c. d. -8 -4 0 4 36. The second and sixth terms of a geometric progression are 3/10 and 243/160, respectively. What is the first term of this sequence? a. b. c. d. 1/10 1/5 3/5 3/2 12 Engineering Ethics and Professional Practice: (Study Without Using FE Manual) 1. According to the Model Rules, Section 240.15, Rules of Professional Conduct, licensed professional engineers are obligated to: a. Ensure that design documents and surveys are reviewed by a panel of licensed engineers prior to affixing a seal of approval. b. Express public opinions under the direction of an employer or client regardless of knowledge of subject matter. c. Practice by preforming services only in areas of their competence and in accordance with the current standards of technical competence. d. Offer, give, or solicit services directly or indirectly in order to secure work or other valuable or political considerations. 2. As a professional engineer originally licensed 30 years ago, you are asked to evaluate a newly developed computerized control system for a public transportation system. The owner requires a currently licensed engineer to evaluate the system. You may accept this project if: Select all that apply. a. You are competent in the area of computerized control systems. b. You professional engineering license has lapsed, but you have two FE interns working for you. c. You took a transportation course in college. d. You have regularly attended meetings of a professional engineering society. e. You have another licensed engineer work for you who is competent in this area, and he/she will conduct all related work and stamp the related design. 3. An engineer testifying as an expert witness in a product liability case should: a. Answer as briefly as possible only those questions posed by the attorney’s. b. Provide an evaluation of the character of the defendant. c. Provide a complete and objective analysis within his or her area of competence. d. Provide information on the professional background of the dependent. 4. A lien is a: a. Claim on property for a payment of debt. b. Requirement that a contractor secure a performance bond for a contract. c. Requirement that a contractor secure a payment bond for a project. d. Claim for damages for a lack of specific performance. 13 5. One of the responsibilities of the principal contractor in construction projects before commencing with work is to have risk assessments performed. Which one of the following constitutes a risk assessment? a. Appointment of a full or part-time construction health and safety officer. b. Plan to mitigate or reduce risks. c. Appoint a full-time competent employee. d. Appoint construction supervisors. 6. A recently finalized regulation impacts a design contract that you have already signed with a company for the construction of a new copper smelter. In order to comply with the regulation, the cost on the project would need to be increased. What are you ethically obligated to do? a. Nothing, as the design for the facility is fluid. b. File an amendment to the bid detailing the impact of the regulation and subsequent cost increase after notifying the company. c. Add in cost increase to the final invoice. d. Consider the smelter grandfathered in to previous regulations, and a redesign should not be necessary. 7. A civil engineer with 10 years of experience reads a story in his local newspaper about the planned construction of a landfill in an area where be believes significant damage will be caused to a nearby wetland. What would be an acceptable course of action? a. The engineer should form a grassroots environmental movement to stop the project. b. The engineer should start a petition to try and delay the project. c. The engineer is not directly involved in the project, so it is none of his concern. d. The engineer should contact the appropriate agencies to gather more information and data on the project before making a decision on what to do. 8. When may professional engineers make political donations? a. At no time. b. Only if it is for current, past, or future influence. c. Only if all donations are made as an individual and do not represent a firm or entity. d. Only below specified amounts. 9. Which of the following is not an ethics violation? a. Signing plans/blueprints without having first designed and/or checked the plans. b. Revealing confidential information about a product without first obtaining permission. c. Granting a contract to a company for which the professional is an officer while concurrently serving on the board issuing the grants. d. Any individual accepting fees from contractors hired for a project. 14 10. In the event of an ethical content, to whom does the engineer hold the least ethical responsibility: a. b. c. d. The employer The client The consumer Society 11. Who owns the rights to inventions that arise during work for a client if no prior specifications regarding inventions are made? a. b. c. d. The inventor The inventor’s company. The client The state 12. Which of the following is not an ethical violation? a. Designing a product to fail in a specified number of years. b. Charging a premium for a superior product. c. Using proceeds from one product in order to sell another product below fair market price. d. All of the above are ethical violations. 13. A professional engineer is the principal at an engineering company and has multiple designers and engineers working on a project. Based on the Model Code of Ethics, select all of the instances where it is appropriate for the engineer to sign and seals plans associated with this project a. The engineer may sign and seal plans which he personally prepared and did the design. b. The engineer may sign and seal plans if the design was developed by employee of his firm, if a general review is preformed. c. The engineer may sign, and seal drawings prepared by other professional engineers that are working under his direct supervision and responsible charge, and are reviewed in detail. d. The engineer may sign, and seal plans prepared by other unlicensed designers that are working under his direct supervision and responsible charge, and are reviewed in detail. e. The engineer may sign and seal drawings for coordination of multiple disciplines if each technical segment is signed and sealed by a licensee responsible for the respective technical segments. f. The engineer may sign, and seal designs prepared by other licensed engineers as the design engineer in responsible charge. 15 14. An engineer is retained to preform an inspection of asphalt on a bridge. During the inspection, the engineer notices a potential defect in structural wall that may have contributed to a fatal accident that occurred on the bridge in the past year. The engineer notes that this information in his field notes and then notifies his client of the potential defect. The client then notifies the public agency that owns the bridge. At the request of the public agency, the engineer does not include the information about the wall in his final report on the asphalt inspection, but the engineer does retain the information in his field notes. Which of the following statements best captures the ethical considerations presented? a. The engineer acted ethically as the potential defect was raised to the appropriate parties for further consideration but was not included in the report since it was speculation and not based on actual design calculations, testing our evaluation by a competent professional. b. The engineer acted ethically to notify the agencies, but acted unethically in not including the potential wall defect in the final report as this information should be documented to ensure further evaluation is performed. c. The engineer acted unethically by not preforming further analysis of the potential defect to determine the adequacy of the bridge. d. The engineer acted unethically, since ignoring the potential defect and leaving it out of the final report could jeopardize the health, safety, or welfare of the public and the engineer has an obligation to document the potential defect to appropriate legal authorities. 16 15. An engineer is retained to preform a routine mine inspection. Upon arriving at the site, the engineer realized he forgot his safety boots and will be unable to enter the mine to preform the inspection. Due to the remote nature of the site, the mine company routinely provides visitors to the site with required personal protective equipment including boots for use at the site. The engineer recognizes that accepting the boots will violate his company’s code of ethics since the company prohibits accepting gifts that have value of more than $100: Select all of the following approaches that would be considered ethical: a. The engineer may accept the boots and is not obligated to notify his employer as the boots are nominally more than $100. By accepting the boots, the engineer will avoid costs associated with delaying the inspection, resulting in a net savings to the company. b. The engineer may accept the boots and is obligated to notify his employer since the boots are more than $100 threshold set by the employer. c. The engineer may use the boots and return them after the inspection. The engineer is not obligated to notify his employer since the boots were used and returned. d. The engineer may decline the boots and request that the inspection be postponed. e. The engineer is not obligated to disclose his forgetting his boots and should postpone the inspection without the need for further explanation. f. The engineer should proceed with the inspection and forego the safety boot requirement since a personal impact and does not affect the safety of others. 16. Engineer A was the primary engineer with direct control for a design of a project at Firm X. When the project was in final review, i.e., essentially complete, Engineer A left to work at Firm Y. prior to leaving, Engineer A did not sign or seal the drawings as the design was not fully complete. A principal from Firm X asks Engineer A to sign and seal the drawings. An ethical response for Engineer A would be: a. To ignore the request as he has no obligation to the former employer. b. To refuse to sign and seal the drawings as he no longer works at Firm X and is no longer in direct control of the design. c. To request a nominal fee to review the final changes and to sign and seal the drawings. d. To request that the contract be transferred to his new firm due to professional liability concerns. 17 17. Experience requirements that must be satisfied for individuals seeking professional licensure typically include all the following except: a. Eights years of progressive experience for students that graduated from an EAC/ABET-accredited engineering program with a qualifying associates degree. b. Four years of progressive experience for students that graduated from an EAC/ABET-accredited engineering program with a qualified bachelor’s degree. c. Three years of progressive experience for students that graduated from an EAC/ABET-accredited engineering program with a qualifying master’s degree. d. Two years of progressive experience for students that graduated with a qualifying doctoral degree in engineering. 18. The profession of engineering requires all of the following except: a. b. c. d. Special Knowledge Special Privileges Special Responsibilities Special Powers 19. Obtaining a professional engineering license in a given state indicates which of the following: a. The licensee is minimally qualified to practice engineering. b. The licensee is an expert in their respective field of examination. c. The licensee may accept professional services contracts only for which they are insured. d. The licensee is qualified to preform each assignment provided by his employer. 20. A state licensing board could revoke a professional engineer’s license for which the following: a. b. c. d. Evidence of alcoholism. Defaulting on a home mortgage. Issuing public opinions based on facts. Running for a political office. 18 21. The three main requirements necessary for a valid contract are typically: a. b. c. d. Design, Bid, Build Offer, Acceptance, Consideration Design, Solicitation, Bid Solicitation, Offer, Build 22. Engineering Firm X holds professional services contracts with private companies Y and Z. The project work at Firm X has exceeded the budget for Company Y and supervisor A directs Engineer B to charge future time to the budget of Company Z, which is well under budget. a. Charge time as directed to Company Z. b. Charge time to Company Y and ignore Supervisor A’s directive. c. Charge time to Company Y ad communicate concerns with incorrectly charging time to Supervisor A and firm principals if the directive does not change. d. If convinced that Supervisor A and Firm X is acting unethically, document the process, resign from Firm X and report the unethical practices. e. Contact Company Y and Z to suggest transferring the contracts from Firm X directly to Engineer B due to internal ethical concerns with billing and misappropriation of funds. f. Notify the press. 19 Engineering Economics: 1. A company borrows $100,000 today at 12% nominal annual interest. The monthly payment of a 5-year loan is most nearly: a. $1,667 b. $2,200 c. $3,100 d. $12,000 2. You must choose between four pieces of comparable equipment based on the costs and salvage values given below. All four pieces have a life of 8 years. Parameter First Cost Annual Cost Salvage Value A $25,000 $8,000 $2,500 B $35,000 $6,000 $3,500 C $20,000 $9,000 $2,000 D $40,000 $5,000 $4,000 The discount rate is 12%. Ignore taxes. The two most preferable equipment pieces and the approximant difference between their present worth values based upon least cost are: a. b. c. d. A and C, $170 B and D, $170 A and C, $234 B and D, $234 3. A company can manufacture a product using hand tools. Tools will cost $1,000, and the manufacturing cost per unit will be $1.50. As an alternative, an automated system will cost $15,000 with a manufacturing cost per unit of $0.50. With an anticipated annual volume of 5,000 units and neglecting interest, the payback period (years) to invest in the automated system is most nearly: a. 2.0 b. 2.8 c. 3.6 d. 15.0 20 4. A construction company bought a new rubber-tire loader and is preforming a risk analysis about whether to purchase insurance. The construction company paid $100,000 for the loader. The annual cost for the insurance premium is $2,000, and the deductible is $1,000. The risk options to purchase or to not purchase insurance are as follows: • • • 0.88 probability of no accident 0.11 probability of a small accident at a cost of $800 0.01 probability of a total loss of the loader The best option and projected cost savings are: a. b. c. d. Purchase insurance and save $990. Purchase insurance and save $1,088. Do not purchase insurance and save $1,010. Do not purchase insurance and save $2,098. 5. A tractor cost $7,500. After 10 years it has a salvage value of $5,000. Maintenance cost are $500 per year. If the interest rate is 10%, the equivalent uniform annual cost is most nearly: a. $500 b. $750 c. $1,400 d. $2,000 6. If the sum of $12,000 is borrowed and the debtor is obligated to pay the creditor $900 for each year the loan is in existence, then, the simple interest is most nearly: a. 2.0% b. 5.0% c. 7.5% d. 12.5% 7. If a one-time amount of $500 is invested at an interest rate of 8% per year, what is the future worth at the end of 30 years? 8. If you need to have $800 in savings at the end of 4 years, how much do you need to deposit today, assuming 5% annual interest? 9. A company borrows $100,000 today on a 5-year loan at 12% nominal annual interest, compounded monthly. What would the monthly payment be? 21 10. The Powerball was won by a single individual. The individual was given two choices: receive 26 payments of $7 million each year, with the first payment to be made now; or receive a single equivalent lump-sum payment. If the state uses an interest rate of 4% per year, the amount of the lump sum payment closest to: a. b. c. d. $72 million $109 million $116 million $135 million 11. If $10,000 is borrowed now at 10% per year interest, the balance at the end of year 2 after payments of $3,000 in years 1 and 2 will be closest to: a. b. c. d. $4,100 $5,800 $6,100 $7,300 12. If a company wants to have $100,000 in a contingency fund 10 years from now, the amount the company must deposit each year in years 6 through 9, at an interest rate of 10% per year, is closest to: a. b. c. d. $19,591 $20,614 $21,547 $22,389 22 13. The present worth of machine “X” (assuming 10% annual interest) is closest to: a. b. c. d. $-65,270 -$87,840 -$103,910 -$114,310 14. An interest rate of 12% per year, compounded monthly, is closest to an effective rate per year of: a. b. c. d. 12.08% 12.28% 12.48% 12.68% 15. A machine with a 5-yar life has a first cost of $50,000 and a $10,000 salvage value. Using straight-line depreciation, the book value at the end of year 3 will closest to: a. b. c. d. $8,000 $12,000 $24,000 $26,000 16. A machine with a 5-year life has a first cost of $50,000 and a $20,000 salvage value. Using MACRS depreciation, the book value at the end of year 2 will be closest to: a. b. c. d. $10,000 $16,000 $24,000 $30,000 23 17. A new engineer decides to invest $6,000 each year into a retirement savings account. The engineer continues this practice for a 30-year period and earns on average 10% a year. The amount at the end of 30 years is most nearly: a. b. c. d. $200,000 $990,000 $1,620,000 $3,140,000 18. A new engineer has a goal of investing enough money into a retirement account to have the equivalent of $1,000,000 in today’s dollars at retirement in 30 years. Assume a rate of return on the investment of 10% per year and average inflation of 2.0% a year, the amount that should be invested annually is most nearly: a. b. c. d. $7,000 $9,000 $11,000 $13,000 19. A piece of equipment will have an initial cost of $125,000 to purchase. It is assumed that maintenance costs will begin at a base level of $2,000 in the first year, increase to $2,500 in year two, and to continue to increase at $500 each year through year 10. The equipment will have a salvage value of $12,000 after 10 years. Using an interest rate of 8%, the present worth of the equipment cost is most nearly: a. b. c. d. $138,000 $142,000 $146,000 $157,000 24 20. Interest on a loan is 8% per year compounded each month. The effective annualized interest rate is most nearly: a. b. c. d. 8% 8.1% 8.3% 8.7% 21. A piece of equipment with an initial cost of $120,000 is expected to have a salvage value of $15,000 after its 5-year service life is depreciated using the straight-line method. The equipment’s book value at the end of year three is most nearly: a. b. c. d. $52,000 $55,000 $57,000 $60,000 22. A solar project is expected to have an initial cost of $2 million, with an annual operations and maintenance cost $50,000. Profits for the project have been estimated at $250,000 per year over a 25-year lifespan. Using an interest rate of 8% per year, the benefit to cost ratio for this project is most nearly: a. b. c. d. 0.95 1.00 1.05 1.10 23. A piece of equipment with an initial cost of $120,000 is expected to have a salvage value of $15,000 after its 5-year service life is depreciated using the MACRS method. The deprecation charge for year three is most nearly: a. b. c. d. $20,000 $21,000 $23,000 $24,000 25 24. Two alternatives are being considered for procuring a part. An interest rate of 8% will be used for each alternative. These alternatives are presented as follows: Method A: Involves purchasing equipment at an initial cost of $100,000, with a 5-year equipment life, $5,000 equipment salvage value, and an operating cost of $15,000 per year. In addition, each part will cost $18 to make. Method B: Involves purchasing parts from a supplier for $32 a part. a. b. c. d. 2800 2950 3100 3250 25. Four levels of quality are being considered for equipment to produce a part. The initial cost and repair cost ad probability of equipment failure in any given year I presented in the table below. If this equipment must be used for 10 years and an interest rate of 6% is used, the most economical option is most likely: a. b. c. d. Option A Option B Option C Option D 26 Statics: 1. The magnitude (N) of the resultant of the three coplanar forces A, B, and C, is most nearly: a. b. c. d. 7.0 7.8 9.2 10.3 2. A heavy roller is held in equilibrium on a frictionless plane AB by the force F, as shown. Which diagram correctly shows a vector polygon of the forces acting on the roller? a. b. c. d. Option A Option B Option C Option D 27 3. Select the location on the x-axis where an additional load must be placed in order to achieve equilibrium of the L-shaped bar. 4. The figure below shows a simple truss. Which members in the truss have no (zero) force in them? a. b. c. d. BG, CG, CF, CE BG, CE CG, CF CF 28 5. Consider the following graph: Which of the following expressions gives the distance from the y-axis to the centroid of the shaded area? 31 a. b. c. 3 ∫0 3๐ฅ 3 ๐๐ฅ 1 ∫0 (๐ฅ+3๐ฅ 2 )๐๐ฅ 3 1 3 1 3 1 3 1 ∫0 (๐ฅ 2 −3๐ฅ 3 )๐๐ฅ ∫0 (๐ฅ−3๐ฅ 2 )๐๐ฅ ∫0 (๐ฅ−3๐ฅ 2 )๐๐ฅ ∫0 (๐ฅ−3๐ฅ 2 )๐๐ฅ 3 1 d. 1 ∫0 (2๐ฅ 2 +3๐ฅ 3 )๐๐ฅ 3 1 ∫0 (๐ฅ−3๐ฅ 2 )๐๐ฅ 29 6. The moment of inertia (in4) of the area about the x’ axis (Ix’) is most nearly: a. b. c. d. 78.0 78.6 118.5 138.8 7. In the figure below, the coefficient of static friction between the block and the inclined plane is 0.25. The block is in equilibrium. As the inclined plane is raised, the block will begin to slide when: a. b. c. d. Sin ษต = 1.0 Cos ษต = 1.0 Cos ษต = 0.25 Tan ษต = 0.25 30 8. Three forces act as shown below. The magnitude of the resultant of the three forces (N) is most nearly: a. b. c. d. 140 191 370 396 9. What is most nearly the magnitude of the resultant of these forces on the eyebolt? a. b. c. d. 2.5 lbs 11.3 lbs 19.9 lbs 22.6 lbs 31 10. A sign has a mass of 150 kg. The sign is attached to the wall by a pin at point B and is supported by a cable between points A and C. Determine the tension in the cable. a. b. c. d. 1875 N 2450 N 3750 N 5000 N 11. What are the x- and y- coordinates of the centroid of the area? a. b. c. d. 3.40 cm; 5.60 cm 3.50 cm; 5.50 cm 3.93 cm; 4.79 cm 4.00 cm; 5.00 cm 32 12. Forces F1 = 220 kN and F2 = 240 kN act at the angles given below. When these forces are added together, the magnitude of their resultant (not shown) is most nearly: a. b. c. d. 190 kN 360 kN 380 kN 440 kN 13. The magnitude of force F at distance x as shown below that will cause vertical and rotational equilibrium for the system is most nearly: a. b. c. d. F = 121 kN, x = 3.9 m F = 121 kN, x = 4.2 m F = 154 kN, x = 3.9 m F = 154 kN, x = 4.2 m 33 14. The forces shown below can be replaced by a single equivalent moment. The magnitude of an equivalent moment is most nearly: a. b. c. d. 50 kN-m 110 kN-m 380 kN-m 440 kN-m 15. A rigid body with mass of 1000 kg and applied loads is shown below. The magnitude of the resultant force at support A to maintain equilibrium of the rigid body below is most nearly: a. b. c. d. 60 kN 70 kN 130 kN 140 kN 34 16. Consider the cable system below that supports the hung load indicated. Ignore selfweight. The magnitude of the force P to maintain equilibrium with the geometry indicated is most nearly: a. b. c. d. 55 lbs 250 lbs 255 lbs 350 lbs 17. Consider the truss and loading shown below. Ignore self-weight. The magnitude of the force in member AC due to the applied loads is most nearly: a. b. c. d. 8 kN 22 kN 25 kN 39 kN 35 18. Consider the rigid frame and applied loads below. Ignore self-weight. The magnitude of the vertical reaction at D due to the applied loads is most nearly: a. b. c. d. 18 kips 22 kips 28 kips 36 kips 19. For the figure shown below, the location of the centroid, y, with respect to the X-axis is most nearly: a. b. c. d. 5.0 mm 5.2 mm 5.5 mm 6.0 mm 36 20. The moment of inertia about the X-X axis of the shape below is most nearly: a. b. c. d. 270 cm^4 280 cm^4 290 cm^4 300 cm^4 21. The moment of inertia about the X-X axis of the shape below is most nearly: a. b. c. d. 90 cm^4 100 cm^4 110 cm^4 120 cm^4 37 22. Two blocks rest on a horizontal surface with one block on top of the other. The surface between the blocks has been intentionally roughened so that the coefficient of friction between blocks is 0.55. The coefficient of friction between the bottom block and the horizontal surface is 0.40. The top block is restrained so that it cannot move horizontally. The force P that is required to move the bottom block is most nearly: a. b. c. d. 6.7 kips 7.5 kips 7.9 kips 9.4 kips 23. A block with a mass of 200 kg rests on an inclined plate with an angle of 15 degrees. The coefficient of static friction between the body and the plane is 0.35. A force P acts horizontally through the center of mass of the body. The magnitude of force that will cause motion to begin up the plane is most nearly: a. b. c. d. 1100 N 1200 N 1300 N 1400 N 38 Dynamics: 1. A boat accelerates at a constant rate of 12 ft/sec2. the boat travels 140 ft while its speed changes to 60 ft/sec. the initial velocity (ft/sec) was most nearly: a. 3.7 b. 5.0 c. 15.5 d. 31.0 2. A small rotating robotic arm weighs 8 N and has a mass radius of gyration of 4.0 cm. The mass moment of inertia (kg*cm2) is most nearly: a. 13.0 b. 32.0 c. 128 d. 256 3. A 5-kg block is sliding along a frictionless surface and is an acted on by a constant force P of 20 N. the time (seconds) when the block is moving at 18 m/s is most nearly: a. b. c. d. 0.22 1.83 4.50 72.0 4. During impact of two objects, which of the following is true? a. Energy is never conserved. b. Energy is always conserved. c. Momentum is never conserved. d. Momentum is always conserved 39 5. A particle starting from rest experienced an acceleration of 3 m/s^2 for 2 s. The particle then returned to rest in an additional distance of 8m. Assuming all accelerations were uniform, what was the total time elapsed for the particle’s motion? a. b. c. d. 2.67 s 4.00 s 4.67 s 5.33 s 6. A 550 kg mass initially at rest is acted upon by a force F(t) = 50e^t, expressed in N. What is the displacement of the mass at t = 4 s? a. b. c. d. 4.51 m 19.5 m 2466 m 3900 m 7. A 2 kg ball of clay moving at 40 m/s collides with a 5 kg ball of clay moving directly toward the first ball with a velocity of 10 m/s. What is the final velocity if both balls stick together after the collision? a. b. c. d. 4.29 m/s 23.0 m/s 30.0 m/s 42.9 m/s 8. A vehicle is moving uphill at a speed of 30 mph on a +2% grade. If a braking deceleration of 10.0 ft/sec^2 is applied, the time it will take the vehicle to stop in seconds is most nearly: a. b. c. d. 2.1 2.8 4.1 4.4 40 9. A disc is rotating in a clockwise direction with a constant counterclockwise acceleration applied. At a time of 2 seconds, the angular velocity is 12 rad/sec and at 4 seconds, the angular velocity is 9 rad/sec. The time in seconds (from time 0) that it takes the disc to stop is most nearly: a. b. c. d. 8 10 12 16 10. In a carnival, a dirt bike launches off a ramp at an angle of 20 degrees at a speed 17.5 meters/sec. Another ramp of the same height is to be placed some horizontal distance away from the first ramp for the bike to land. The distance the second ramp should be placed away from the first ramp is most nearly: a. b. c. d. 18 m 19 m 20 m 21 m 11. Vehicle A is travelling at a speed of 90 km/hr along a highway. A side ramp with a radius of 210 meters (to the centerline of travel) merges into the highway. A second vehicle, Vehicle B, is traveling at 72 km/hr along the ramp at the location indicated below. Both vehicles are 6 m long, and the speeds are maintained. When the center of Vehicle B arrives at the PT, the front bumper of B will most nearly be: a. b. c. d. 18 m behind the back bumper of Vehicle A. 12 m behind the back bumper of Vehicle A. 6 m behind the back bumper of Vehicle A. 0 m behind the back bumper of Vehicle A. 41 12. A rod and cylinder are welded together to form a rigid assembly. They are supported by a frictionless pin at one end and held horizontal. The rod diameter is 2-cm and the cylinder diameter is 10-cm. The mass of the rod is 2.5 kg and the mass of the cylinder is 12 kg. The mass moment of inertia about the point of rotation at the pin A is most nearly: a. b. c. d. 0.5 kg-m^2 5.5 kg-m^2 15.1 kg-m^2 15.4 kg-m^2 42 Mechanics of Materials: 1. The shear diagram for a particular beam is shown below. All lines in the diagram are straight. The bending moment at each end of the beam is zero, and there are no concentrated couples along the beam. The maximum magnitude of the bending moment (kN*m) in the beam is most nearly: a. b. c. d. 8 16 18 26 2. The pressure gauge in a air cylinder reads 1,680 kPa. The cylinder is constructed of a 12-mm rolled-steel plate with an internal diameter of 700 mm. The tangential stress (MPa) inside the tank is most nearly: a. 25 b. 50 c. 77 d. 100 3. A 1-ft rod with a diameter of 0.5 in. is subjected to a tensile force of 1,300 lb and has a elongation of 0.009 in. The modulus of elasticity (ksi) of the material is most nearly: a. 740 b. 884 c. 8,840 d. 10,000 43 4. The maximum inplane shear stress (ksi) in the element shown below is most nearly: a. b. c. d. 10 14.1 44.1 316 5. Based on the given stress-strain curves, which material has the largest plastic deformation? a. b. c. d. Material A Material B Material C Material D 44 6. The piston of a steam engine is 50 cm in diameter, and the maximum steam gauge pressure is 1.4 MPa. If the design stress for the piston rod is 68 Mpa, its crosssectional area (m^2) should be most nearly: a. b. c. d. 40.4 * 10-4 98.8 * 10-4 228.0 * 10-4 323.0 * 10-4 7. Which of the following is true when a circular shaft is subjected to torsion only? a. Maximum shear stress occurs at the outermost fibers. b. Maximum shear stress occurs at the center of the shaft. c. Constant shear stress occurs throughout the shaft. d. No shear stress is present throughout the shaft. 8. A 10 kg axial load is uniformly carried by an aluminum alloy pipe with an outside diameter of 10 cm and an inside diameter of 9.6 cm/ The pipe is 1.2 m long. Young’s modulus for the aluminum alloy is 75000 MPa. Neglecting the effects of buckling, how much is the pipe compressed? a. b. c. d. 0.00026 mm 0.0026 mm 0.11 mm 25 mm 45 9. A steel pipe fixed at one end is subjected to a torque of 100,000 N-m. The pipe is originally 3 m in length with an outside diameter of 35 cm and a wall thickness of 1 cm. Steel has a modulus of elasticity of 210 GPa and a Poisson’s ratio of 0.30. What is the resulting angle of twist of the pipe? a. b. c. d. 0.0004 rad 0.0008 rad 0.012 rad 0.024 rad 10. A beam has a triangular cross-section as shown. What is the maximum compressive stress in the beam? a. b. c. d. 7.8 MPa 15.6 MPa 23.4 MPa 31.3 MPa 11. A rectangular beam 4 cm wide and 6 cm high is subjected to a shear of 7,000 N at a particular location. The beam is constructed of 2014-T3 aluminum. What is most nearly the maximum shear stress at that location? a. b. c. d. 290 N/cm^2 440 N/cm^2 520 N/cm^2 660 N/cm^2 46 12. Given the following, what is most nearly the maximum shear stress? a. b. c. d. 100 MPa 160 MPa 200 MPa 210 MPa 13. A rectangular steel bar 37.5 mm wide and 50 mm thick is pinned at each end and subjected to axial compression. The bar has a length of 1.75 m. The modulus of elasticity is 200 GPa. What is the critical buckling load? a. b. c. d. 60 kN 93 kN 110 kN 140 kN 14. A beam with a width of 50 cm and depth of 100 cm is subjected to the loading below. The magnitude of the moment that causes the maximum bending stress in the beam due to the applied loads (ignore self-weight) is most nearly: a. b. c. d. 10 kN-m 15 kN-m 20 kN-m 25 kN-m 47 15. A beam with a width of 6 inches and depth of 12 inches is subjected to the loading below. The magnitude of the moment that causes the maximum bending stress in the beam due to the applied loads (ignore self-weight) is most nearly: a. b. c. d. 50 kip-ft 56 kip-ft 100 kip-ft 112 kip-ft 16. The shear force diagram of a beam is given below where the shear is in kips and distances are measured in feet. No concentrated moments are applied to the beam and all lines are straight. The section is rectangular. The magnitude of the moment that causes maximum bending stress in the beam is most nearly: a. b. c. d. 32 kip-ft 65 kip-ft 80 kip-ft 92 kip-ft 48 17. The following beam is supported by two steel cables that each a modulus of elasticity of 29,000 ksi and a cross-sectional area of 0.1 ft^2. In addition to supporting the applied load, the weight of the beam is 200 lbs. The strain in cable A is most nearly: a. b. c. d. 0.2 0.002 2*10^-6 2*10^-9 18. A clevis is used to connect a steel bracket with a block of wood is shown below. If the force P = 15 kN and the bolt has a diameter of 20 mm, the average shear stress in the bolt along line A due to the load P is most nearly: a. b. c. d. 12 MPa 24 MPa 48 MPa 96 MPa 19. The maximum torsional shear stress developed in a 10-cm diameter solid steel shaft subjected to an applied torque of 50 kN-m is most nearly: a. b. c. d. 0.25 MPa 3 MPa 30 MPa 255 MPa 49 20. The maximum angle of twist developed in a 4-m long aluminum shaft with a diameter of 12-cm when subjected to a torque of 50 kN-m is most nearly; a. b. c. d. 0.40 1.40 5.40 220 21. A composite member is shown below with properties and dimensions given. The magnitude of the axial force P that will cause the total length of the member to increase by 5 mm is most nearly: a. b. c. d. 0.01 kN 0.1 kN 40 kN 40,000 kN 22. A copper pipe with a diameter of 19 mm and thickness of 1 mm is rigidly installed between two fixtures that are 4 m apart at a temperature of 20 degrees Celsius. After the initial installation, there is no axial stress in the pipe. If temperature of the liquid used in the pipe is 5 degrees Celsius, the magnitude of the stress in the pipe is most nearly: a. b. c. d. 5 MPa 29 MPa 48 MPa 53 MPa 50 23. The bracket shown in the figure below supports a force as shown. Assume buckling will not control. The cross-section of the column is 10-cm * 10-cm square and the force P = 15 kN. The maximum combined stress at the base of the column at point A due to force P is most nearly: a. b. c. d. 1.5 MPa 43.5 MPa 45.0 MPa 46.5 MPa 24. An element experiences the axial and shear stresses indicated in the figure below. The principal stresses are most nearly: a. b. c. d. 30 MPa, 90 MPa 0 MPa, 125 MPa -3 MPa, 122 MPa -62 MPa, 62 MPa 51 Materials: 1. Ready-mixed concrete being delivered to a jobsite is found to have a slump less than specified. Without compromising strength, which of the following is the most appropriate corrective action? a. Decrease the amount of water in the mix before the truck leaves the ready-mix plant. b. Increase the water to the mix in the truck at the jobsite before the concrete is poured. c. Add a water-reducing admixture to the mix in the truck at the jobsite before the concrete is poured. d. Increase the rotation speed of mixing drum while the truck is in transit to the jobsite. 2. The test that measures the energy required to fracture a specimen at a given temperature is the: a. Brinell Test b. Rockwell Test c. Endurance Test d. Charpy Test 3. In general, a metal with high hardness will also have: a. Good Formability b. High Impact Strength c. High Electrical Conductivity d. High Yield Strength 52 4. The following preliminary concrete mix has been designed assuming that aggregates are in oven-dry condition. However, the aggregates used are in SSD condition. Water = 305 lb/ yd3 Cement = 693 lb/ yd3 Course Aggregate (SSD) = 1,674 lb/ yd3 Fine aggregate = 1,100 lb/ yd3 The properties of the aggregates are: The amount of water (lb/yd3) that would be used in the final mix is most nearly: a. b. c. d. 206 222 305 388 5. The solid line represents results from a uniaxial tension test. The slope of the dashed line is associated with which physical property of the material? a. b. c. d. Yield Strength Yield Strain Secant Modulus Modulus of Elasticity 53 6. The amount of water specified in a concrete mix is typically based on which of the following conditions for the aggregate? a. b. c. d. Oven dry Air dry Saturated Surface dry Moist 7. Aggregate used in hot mix asphalt should be in which of the following conditions? a. b. c. d. Oven dry Air Dry Saturated Surface dry Moist 8. Variables evaluated for the design of hot-mix asphalt include all of the following except: a. b. c. d. Aggregate Asphalt binder Ratio of aggregate to asphalt binder Water 54 9. A concrete mix design is provided for a job with the following requirements per cubic yard: The moisture content of the coarse and fine aggregates is measured at 2% at the batch plant on a given day. For the aggregate moisture contents given, the amount of water that needs to be added to the mix design per cubic yard is most nearly: a. b. c. d. 207 lbs 231 lbs 272 lbs 313 lbs 10. A concrete mix design requires 593 pounds of cement per cubic yard and has a maximum water-cement ratio specified as 0.45. Portland cement is the only cementitious material in the mix. If a 10-cubic yard truck arrives on-site with the batch ticket indicating 310 gallons of water were already included in the batch (excess aggregate moisture plus added water), the minimum number of gallons required to make the water-cement ratio exceed the specification is most nearly: a. b. c. d. 0 (the w/c ratio already exceeds 0.45) 5 gallons 10 gallons 15 gallons 55 Use the graph below for questions 11-12: 11. The ultimate tensile strength in this material is most nearly: a. b. c. d. 47,500 psi 50,000 psi 52,000 psi 78,500 psi 12. The modulus of elasticity of this material is most nearly: a. b. c. d. 5,500,000 psi 1,750,000 psi 24,000,000 psi 30,000,000 psi 56 13. Select the materials that exhibit approximate linear elastic behavior to the points indicated: a. b. c. d. e. f. g. Steel up to the yield strength, Fy Steel up to the ultimate tensile strength, Fu Steel up to the failure strength, Ff Concrete up to 50% of its maximum compressive strength, fc’/2 Concrete up to its maximum compressive strength, fc’ Concrete up to its maximum compressive strain, εcu Concrete up to its modulus of rupture, fr 14. Steel reinforcement is typically added to concrete flexural members for all the following reasons except: a. b. c. d. To allow for increased ductility and deformation in the beam prior to failure. To resist tensile forces developed due to the bending moment. Because steel and concrete have similar coefficients of thermal expansion. To eliminate tension cracking when bending moments exceeds the rupture capacity of the concrete. 15. The modulus of elasticity of normal-weight concrete with a compressive strength of fc’ = 4,000 psi consistent with ACI 318 requirements is most nearly: a. b. c. d. 1.1 * 10^5 psi 3.6 * 10^6 psi 3.8 * 10^6 psi 4.0 * 10^6 psi 16. Which of the following material properties can typically be used to describe wood? a. b. c. d. Incombustible Impermeable Isotropic Orthotropic 57 17. From the following list, select the properties and characteristics that have an impact on the design tensile strength of sawn lumber: a. b. c. d. e. f. Moisture Content Repetitive Use Temperature Size Flat Use Load Duration 58 Fluid Mechanics: 1. The pitot tube shown below is placed at a point where the velocity is 2.0 m/s. The specific gravity of the fluid is 2.0, and the upper portion of the manometer contains air. The reading, h (m), on the manometer is most nearly: a. b. c. d. 20.0 10.0 0.40 0.20 2. If the standard density of water is 1,000 kg/m^3, a fluid having a specific gravity of 1.263 and an absolute dynamic viscosity of 1.5 kg/(m*s) has a kinetic viscosity (m^2/s) of most nearly: a. b. c. d. 1.19 * 10-3 1.50 * 10-3 1.89 * 10-3 528 3. Archimedes’ principle states that: a. b. c. d. The sum of the pressure, velocity, and elevation head is constant Flow passing two points in a stream is equal at each point The buoyant on a body is equal to the volume displayed by the body A floating body displays a weight of fluid equal to its own weight. 59 4. A 1-in-diameter jet of 50โ water is deflected 90o by an angled shoot as shown. The water enters with a velocity of 25 ft/sec and freely exists into the atmosphere with the same velocity. The forces (lb) in the x and the y directions of the chute are most nearly: a. b. c. d. Fx = 0 , Fy = 0 Fx = 9.33 lb, Fy = 0 Fx = 0, Fy = 9.33 lb Fx = 9.33, Fy = 9.33 5. A water tank is shown. Assume no minor loses in the discharge and a common coefficient of discharge C = 0.6. What is the discharge velocity. a. b. c. d. 13.6 11.8 14.3 15.2 60 Surveying: 1. The value of angle A in the figure below is most nearly: a. b. c. d. 300 18’ 47” 320 47’ 50” 390 05’ 38” 420 35’ 09” 2. The area inside the quadrilateral, PC, PI, PT, and O equals 83,164 ft^2. The shaded area (ft^2) between the circular curve and the tangents is most nearly: a. b. c. d. 2,879 3,577 5,407 8,286 61 3. The cross-sectional areas to be excavated (cut) at certain sections of a road project are as follows: Using the prismoidal method, the volume of earth to be excavated (yd^3) between stations 4+35 and 5+65 is most nearly: a. b. c. d. 1,460 1,840 1,860 1,900 4. The term projected as it relates to the state plane coordinate system means that the: a. b. c. d. The survey is inaccurate and needs to be corrected. The survey points from found monuments need to undergo a unit conversion. Handwritten coordinates are entered into computer software. Earth’s curvature needs to be taken into account for survey calculations. 5. A total station is set up 5 ft above a benchmark that has an elevation of 820.50 ft. A slope angle and slope distance of -30 15’ and 645.90 ft, respectively, are measured to a reflector that is set up 4.25 ft above a hub at point B. Neglecting curvature and refraction, the elevation (ft) of the hub at Point B is most nearly: a. b. c. d. 785.76 784.63 783.88 779.63 62 6. A backsight of 7.76 ft is taken on a turning point with an elevation of 2,325.58 ft. If the foresight taken on the top of an construction pin is 4.25 ft, the elevation (ft) of the top of the pin is most nearly: a. b. c. d. 2,313.57 2,322.07 2,329.09 2,337.59 7. Determine the azimuth and bearing for the image below: 8. Using the trapezoidal rule, what is most nearly the area of the region below? a. b. c. d. 3600 sf. 3800 sf. 4000 sf. 4200 sf. 63 9. Using the method of area by coordinates, what is most nearly the area of the shaded region shown? a. b. c. d. 14.00 16.75 18.25 21.50 64 Water resources and Environmental Engineering: 1. A 20-acre parcel of land has a rainfall intensity of 1.5 in/hr and a rational method runoff coefficient C of 0.10. The flow rate (cfs) for this site is most nearly: a. b. c. d. 3.0 5.0 7.5 9.0 2. A flow of 15.5 cfs enters the pipe system at A as shown, and exits at B and C. Pipe data are given in the following table. Assume all of the pipes are all at the same elevation. The head loss (ft) in pipe CB is most nearly: a. b. c. d. 0.05 0.13 0.18 0.23 65 3. A pump station delivers wastewater from a sump at an elevation of 78 ft to a maintenance hole with a water surface elevation 112 ft. The static head (ft) for this pump is most nearly: a. b. c. d. 17 34 44 78 4. A 24-in. water distribution pipeline carrying 15 cfs flow branches at Point A into two pipelines, 1 and 2, both with Hazen-Williams C of 130. Pipeline 1 has an 18-in. diameter and is 2,400 ft long. Pipeline 2 has a 12-in. diameter and is 1,200 ft long. The branched pipes join at Point B to a 24-in. pipe to carry the flow downstream. The flow (cfs) in Pipeline 1 is most nearly: a. b. c. d. 5.0 10.0 12.9 15.0 5. A suppressed rectangular weir rises from the bottom of the pond to an elevation of 37 ft. The water is 50 ft deep, and the weir is 200 ft long. The flow (ft^3/s) of water over the spillway is most nearly: a. b. c. d. 1,500 12,500 23,800 31,200 66 6. For a new development of 75 acres (0.117mi^2), the peak runoff for a 25-yr storm of 360 ft^3/s is to be limited to 180 ft^3/s through the use of a detention basin. Runoff (Q) is 3.4 in. Assume Type II rainfall. Using the TR-55 Method and figure below, the preliminary estimate of the storage volume (ac-ft) is most nearly: a. b. c. d. 0.07 0.11 3.80 5.94 7. A 36-in diameter sewer is installed at a slope of 0.006 ft/ft. Assuming the roughness coefficient (n) is constant with depth and equal to 0.015, the velocity (ft/s) of water in a half-full pipe is most nearly: a. b. c. d. 4.3 5.8 6.3 10.1 67 8. Four monitoring wells, A,B,C and D, lie equidistant (200 ft) from a fifth well, E. The depth to the water table is measured at each well and is shown below. The datum for the top of the casing is equal for the five wells. Groundwater flow moves in which direction from Point E? a. b. c. d. South East North West 9. A jar test is used to evaluate the efficiency of a coagulation process and allows the plant operator to optimize which of the following parameters? a. b. c. d. Alum Dosage Temperature Lime Dosage Dissolved Oxygen 68 10. A residential development is composed of pavement, lawn and open area with CN values given below. For a 100-year storm that produces approximately 7-inches of rainfall, the discharge from the site (assuming no other inflow) is most nearly: a. b. c. d. 4.8 in. 5.1 in. 5.7 in. 7.0 in. 11. In stormwater management, the initial abstraction accounts for all the following except: a. b. c. d. Infiltration Evaporation Retention Runoff 12. A concrete-lined channel is used to convey water flow between point A at a surface elevation of 510 m and point B at a surface elevation of 508 m above sea level over a distance of 2 kilometers. The surface roughness coefficient of the is 0.012. The flow conveyed by this channel in m^3/s is most nearly: a. b. c. d. 70 105 150 165 69 13. An 8-foot-wide rectangular channel carries 200 cubic feet per second of water at a depth of 1.5 feet before entering a hydraulic jump. The water depth downstream of the jump is most nearly: a. b. c. d. 2.4 ft. 2.7 ft. 3.4 ft. 4.4 ft. 14. A pump is used to lift water from a reservoir with a surface elevation of 210 feet to an outlet elevation of 235 ft with a discharge pressure of 50 psi. The pump flow is 100 gal/min and uses a 2.5-inch diameter hose with a C value of 135. The distance from the pump to the outlet is 200 feet. Head loss due to fittings is approximately 5 feet. To supply 100 gpm at 50 psi ate the outlet, the pump pressure in psi is most nearly: a. b. c. d. 20 40 50 70 15. A flow test is preformed at a fire hydrant top determine the flow rating at a pressure of 20 psi. The static pressure at the hydrant is 70psi. The test uses a hydrant with a 2.5 inch orifice with a square outlet projecting into the barrel of the hydrant. A pitot tube of 45 psi is observed during the test. The maximum flow rate that this system can provide at 20 psi is most nearly: a. b. c. d. 875 gpm 1270 gpm 1560 gpm 3500 gpm 70 16. The purpose of an emergency spillway is most closely: a. To lower reservoir levels in anticipation of a significant rainfall event that could cause flooding. b. To divert flows from a reservoir, if a dam safety inspection indicates a dam’s principal in an unsafe condition. c. To divert reservoir flows so that emergency responders can safely access a water body in the event of a drowning or other serious injury. d. To allow flow to pass that exceeds the capacity of the principal spillway and protect the dam in the event of a flood. 17. A weir must be sized at a pond to pass flow into an emergency spillway for flood control. Given a weir width of 10 ft, which is smaller than the width of the channel, the approximant depth of flow required to pass 125 cfs is most nearly: a. b. c. d. 1’- 6” 2’- 0” 2’- 6” 3’- 0” 18. Characteristics that lead to eutrophication of a water body include all the following except: a. b. c. d. Nitrogen and Phosphorus rich runoff Sediment deposition which reduces the volume of a water body High levels of dissolved oxygen An overabundance of plants and nutrients 71 19. Standard Stormwater Management Practices (SMPs) for water quality controls consider all the following, except: a. Capture and treat 100% of the water quality volume. b. Achieve 80% reduction in TSS and 40% reduction in TP. c. Maintain 100-year design storm peak site discharge flow to levels to a pre-construction level. d. Include a pretreatment mechanism and a maintenance plan. 20. To provide a minimum velocity, when half-full, of 2.0 ft/s in a 12-inch diameter sewer pipe with an “n” value of 0.013, the drop per 100 ft must be most nearly: a. b. c. d. 0.02 0.15 0.20 0.44 21. The primary purpose of the federal National Discharge Pollutant Elimination System in the United States is which of the following: a. b. c. d. Limit and control pollutants from point source discharges to waters of the United States. Develop new technologies to research and mitigate impacts of deleterious pollutants Establish standards for maximum contaminant levels for safe drinking water. Provide aid to comm unities to construct and maintain treatment plants for elimination of pollutants. 22. An unseeded domestic wastewater BOD test is preformed. A 6-mL sample of wastewater is diluted in a 300-mL test bottle. Initially, the dissolved oxygen content is measured as 8.0 mg/L. After 5 days, the dissolved oxygen is 4.0 mg/L. If the k-rate is 0.30 per day, the ultimate BOD in mg/L is most nearly: a. b. c. d. 150 207 257 300 72 23. A chemical analysis of water sample indicates Ca++ is at a concentration of 10 mg/L and Mg++ is at a concentration of 25 mg/L. The total hardness of the water expressed as CaCO3 is most nearly: a. b. c. d. 35.0 58.5 102.5 127.5 73 Structural Engineering: 1. The 40-kip vertical load at Joint C in the steel truss shown below produces the forces given in the accompanying table. The cross sectional area of each member is 4.0 in^2, and the length of each member is given in the table. The elastic modulus of steel is 29,000 ksi. The downward vertical displacement (in.) of Joint C is most nearly: a. b. c. d. 1.046 0.294 0.132 0.102 2. The proportional limit and modulus of elasticity for a material are 40 ksi and 30,000 ksi, respectively. A square column made from this material has a moment of inertia equal to 6.8 in.^4 and an area equal to 9in^2. Assume a pin-pin connected column so that the effective length factor K is equal to 1.0. The maximum column length (in.) based on the Euler formula is most nearly: a. b. c. d. 42.2 74.8 195.0 224.3 74 3. The frame in the figure below is: a. b. c. d. Unstable Stable and determinate Indeterminate one degree Indeterminate two degrees 75 4. Which combination of moment diagram and deflection shape most accurately corresponds to the continuous beam with loading shown? 76 5. Which of the vertical-load influence lines shown below is correct for Member U2U3 of the truss shown below? a. b. c. d. Option A Option B Option C Option D 77 6. The W21 * 57 steel beam shown in the figure has its compression flange laterally braced at the one-third points over its full length. Assume Fy = 50 ksi and Cb = 1.0 for the critical segment. The maximum factored load wu (kips/ft) that the beam can carry for this length is most nearly: a. b. c. d. 2.658 3.360 4.302 4.778 7. According to the American Concrete Institute (ACI) 318-11, the value of แถฒ that should be used in computing the design moment strength, แถฒMn for the beam section shown below is most nearly: a. b. c. d. 0.80 0.81 0.84 0.90 78 8. In the truss shown, there is a pin connecting the members at each joint. The force (kips) in Member CD is most nearly: a. b. c. d. -81 (compression) -113 (compression) -122 (compression) -169 (compression) 9. A reinforced concrete beam is subjected to a factored moment Mu = 648 ft-kips. For concrete, fc’ = 4,000 psi. For steel fy = 60,000 psi. The beam is reinforced with eight #8 bars in two rows, positioned as shown in the figure. Assume that แถฒ = 0.90. The minimum adequate overall width (b) for this beam is most nearly: a. b. c. d. 10 12 13 15 79 10. For the plane truss shown below, what is most nearly the axial force in member CG? a. b. c. d. 45.3 kip (Compression) 45.3 kip (Tension) 90.5 kip (Compression) 90.5 kip (Tension) 80 Geotechnical Engineering: 1. What is the area of the Atterberg chart provided is associated with elastic silt? a. b. c. d. CH CL OL MH 2. An undisturbed sample of soil has a specific gravity of solids of 2.70, a moisture content of 10.5%, and a void ratio of 0.63. The degree of saturation is most nearly: a. b. c. d. 25% 45% 65% 85% 81 3. Direct shear test data of a sand are shown below: The angle of internal friction is most nearly: a. b. c. d. 00 270 300 630 4. Subsurface exploration indicates that a level site has a 10-ft upper layer of sand. The groundwater table is at the ground surface. The unit weight of the sand is 135 pcf. The effective overburden stress (psf) at a depth of 10 ft is most nearly: a. b. c. d. 625 725 1,350 1,975 5. A 12-ft high retaining wall has backfill of granular soil with an angle of internal friction of 300 and a unit weight of 125 pcf. The resultant Rankine active force (lb/ft) on the wall is most nearly: a. b. c. d. 2,250 3,000 9,000 27,000 82 6. A consolidated, undrained triaxial shear test was preformed on an over consolidated clay mix specimen with a diameter of 1.4 in. The test yielded a cohesion of 530 psf and an angle of internal friction of 180. If the normal load at failure was 125 lb, the shear strength (psi) of the soil is most nearly: a. b. c. d. 10 26 30 556 7. A strip footing having a width B = 2ft is to be constructed at ground surface (Df = 0). Underlying the footing is sand having the following bearing capacity factors. Nc = 0 , Nแตง = 25, and Nq = 20. The unit weight of sand แตง = 120 pcf. The ultimate bearing capacity qult (psf) of the footing is most nearly: a. b. c. d. 1,200 2,400 3,000 4,800 8. A three-story concrete building will be constructed on a vacant parcel in a city. The soil boring log shows a 20-ft thick layer of loose soil over a 5-ft thick limestone layer. Which of the following foundations will provide the least settlement for this building? a. b. c. d. Spread Footing Mats Foundation Deep Foundation Wall Foundation 83 9. A normally consolidated 10-ft clay layer is surcharged, which causes a decrease in thickness. The coefficient of consolidation is 0.16 ft^2 per day and the time factor is 1.2 for U = 50%. The clay layer is confined between two layers of dense sand. The time (days) required for 50% consolidation is most nearly: a. b. c. d. 5 38 188 750 10. A slope of clay-mix material experiences failure along a 100-ft long slip surface at an angle of 270. The soil above the slip surface weighs 100 tons, has an angle of internal friction of 200, and has a cohesion of 1.2 psi. The factor of safety at slope failure is most nearly: a. b. c. d. 0.7 0.9 1.7 381.3 11. An undisturbed sample of clay has a wet weight of 220 lb, a dry weight of 205, and a total volume of 1.73 ft^3. The solids have a specific gravity of 2.65. The void ratio is most nearly: a. b. c. d. 0.24 0.40 0.61 1.00 84 12. A soil’s grain size distribution curve is as shown. Given that D60 = 0.49 mm and D10 = 0.19 mm, the coefficient of curvature is most nearly: a. b. c. d. 0.17 0.44 1.60 3.00 13. An inorganic soil has the following characteristics: Using the Unified Soil Classification System, what is the soil’s classification? a. b. c. d. GW ML MH CH 85 14. For the soil profile shown, what is most nearly the effective stress at Point C? a. b. c. d. 92 kPa 128 kPa 186 kPa 222 kPa 15. A direct shear test is preformed on a dry silty sand. A normal stress of 150 kPa is applied to a specimen with a diameter of 71 mm and a height of 25mm. The shear force at failure is 276 N. What is most nearly the angle of internal friction? a. b. c. d. 15o 25o 35o 45o 86 16. A continuous footing is founded 3 feet below the ground surface in a clay for which γ = 125 pcf, c =1200 psf, and ำฉ = 0o. If the factor of safety is to be at least 3.0, what is most nearly the recommended allowable bearing capacity? For the purposes of this problem, use Nc = 5.14, Nq = 1, and Nγ = 0. a. b. c. d. 2180 psf 3600 psf 6540 psf 9350 psf 17. A normally consolidated clay layer has a liquid limit of 45 and an initial effective stress (at the midpoint of the layer) of 2000 psf. Placement of a sand fill over the layer causes a vertical stress increase of 800 psf. Most nearly, how much will the void ratio at the midpoint of the layer increase? a. b. c. d. 0.046 0.125 0.141 0.315 18. A 5-ft thick normally consolidated soil layer is located between two sand layers. Assume an initial void ratio 0.900 and a compression index of 0.35. A surface load increases the existing average stress in the layer from 1000 psf to 1500 psf. Most nearly, what is the settlement of the clay layer? a. b. c. d. 0.033 in 0.160 in 0.263 in 1.960 in 87 19. A 10-ft. thick layer is drained by sand layers at the top and the bottom. It is to predicted to settle a total of 2.0 inches under the stress increase due to a foundation load. The coefficient of consolidation is 0.03 ft^2 / day. What is most nearly the settlement at the end of year 1? a. b. c. d. 0.37 in 0.73 in 1.45 in 2.00 in 88 Transportation Engineering: 1. A highway profile is shown in the figure. If the design stopping sight distance is 600 ft, the driver’s eye height above the roadway surface is 3.50 ft, and the height of an object in the roadway to be avoided by stopping is 1.0 ft, the minimum design length (ft) of the vertical curve is most nearly: a. b. c. d. 3,600 1,966 1,136 1,017 2. A flexible pavement system is to be designed using the AASHTO structural number design method with the following criteria: If the minimum thickness of the surfacing and aggregate base are used, the required thickness (in.) of the aggregate subbase is most nearly: a. b. c. d. 4 5 6.5 8.5 89 3. A freeway lane has a volume of 1,400 vehicles/hr and an average vehicle speed of 45 mph. The time spacing (sec) between vehicles (center to center) is most nearly: a. b. c. d. 2.6 5.2 15 31 4. At an urban pedestrian crosswalk, the initial WALK signal is displayed for 6.0 sec, after which a flashing DON’T WALK signal is displayed. The pedestrian walking speed is 3.5 ft/sec, and the street to be crossed is 31.5 ft wide. At the end of the green time, the flashing DON’T WALK signal is terminated. The minimum length of time (sec) the green must be displayed is most nearly: a. b. c. d. 6.0 9.0 12.5 15.0 5. An urban intersection is being reconstructed to address safety problems, at it is estimated that the two mutually exclusive counter measures have a crash reduction factor of 0.25 and 0.15, respectively. If the expected number of crashs per year is 10 and noi significant growth in traffic is anticipated, the expected numb er of avererage crashes per year after reconstruction is most nearly: a. b. c. d. 3.6 4.0 6.0 6.4 90 6. A two-way stop-controlled intersections, the sight distance required for minor street movements is determined by: a. b. c. d. Approach sight triangles Departure sight triangles Stopping sight distance Decision sight distance 7. For a given loading, soil conditions, and design life, which of the following pavement types will most likely be the thinnest highway pavement design? a. b. c. d. Hot-mix asphalt Warm-mix asphalt Portland Cement concrete Composite hot-mix asphalt over Portland cement concrete 8. Which of the following statements about a basic freeway segment are true according to the Highway Capacity Manual? Select all that apply: a. Freeway segments with 75-mpg free-flow speed experience a reduction in operating speeds at a lower-volume threshold than a freeway segment with a 55mph free-flow speed. b. The free-flow speed of a freeway segment is impacted by the amount of lateral clearance on the right side of the roadway. c. The capacity of a freeway segment with a 75-mph free-flow speed is higher than a similar facility with a 55-mph free-flow speed. d. A freeway segment with 13-ft lanes has a higher free-flow speeds than a similar facility with 12-ft lanes. e. Increases in traffic volume lower the estimated operating speed of a freeway segment for both low and high volume ranges. 91 9. To encourage more carpooling during the peak commute times, a metropolitan area is considering adding HOV lanes to a busy interstate segment. An existing transit route has a utility of -0.65, which is unaffected by the proposed change. If the existing non-HOV lanes have a utility of +1.2 and the proposed change introducing a carpool mode has a utility of -0.40, the percentage of trips expected to carpool is most nearly: a. b. c. d. 0% 15% 17% 74% 92 Construction Engineering: 1. Operation manuals, warranties, guarantees, and as-built drawings are generally provided to the owner during which phase of the project? a. b. c. d. Construction Procurement Close-out Feasibility 2. A loader has a full-bucket of 3 yd^3, and the average time required to place one bucketload of soil into a truck is 1 minute. The loader is supported by four trucks with a volume of 15 yd^3 each and a cycle time of 12 min plus the time to load the truck. The ideal productivity (yd^3/hr) of this system is most nearly: a. b. c. d. 180 212 277 300 3. A project has a CPI > 1 and an SPI> 1.This would indicate that the project is: a. b. c. d. Behind schedule with a cost savings Ahead of schedule with a cost savings Behind schedule with a cost overturn Ahead of schedule with a cost overturn. 93 4. An embankment having a volume of 320,000 yd^3 is to be constructed from local borrow. The dry unit weight and moisture content of the borrow material were determined to be 106 pcf and 18.2%, respectively. The embankment material has a total unit weight of 122 pcf and a moisture content of 16.7%. The volume of borrow (yd^3) needed to construct the embankment is most nearly: a. b. c. d. 274,100 315,500 324,500 373,600 5. Which set of orthographic views correctly represents the isometric view of the structure shown below: a. b. c. d. Option A Option B Option C Option D 94 6. The average production of the excavator is the controlling factor in a highway ditchcleaning contract. Excavators with four different bucket sizes are available as rental units. The hourly rental rate is already directly proportional to the bucket capacity of the excavator. Assume that production (loose yd^3/hr) is equal to (excavator cycles per hour) * (average bucket payload in LCY per cycle). The excavator characteristics are as follows: The optimally efficient excavator is: a. b. c. d. Excavator 1 Excavator 2 Excavator 3 Excavator 4 7. A work task has a current cost of $3,400, with a budget cost at this same point of $3,200. The total budget for this task is $4,000. The estimated cost at completion for this task is most nearly: a. b. c. d. $3,750 $4,000 $4,250 $4,850 95 8. A drawing of a roadway cross section is shown below. The arrow with a number indicates: a. b. c. d. Thickness of the surface coating is 0.025 in. The slope of the roadway is 3 in. per 10 ft across the slope The edge of the roadway will receive a chamfer of ¼ in. Grooves ground into the surface of the roadway are ¼ in. deep. 9. For the following activity-on-node diagram, what is most nearly the length of the critical path? a. b. c. d. 0 days 12 days 15 days 19 days Answer Key: Mathematics and Statistics: 1. C 2. A 3. A 4. C 5. A 6. B 7. D 8. B 9. C 10. C 11. B 12. A 13. B 14. A 15. D 16. B 17. D 18. D 19. A 20. C 21. C 22. A 23. C 24. D 25. B 26. C 27. D 28. B 29. D 30. D 31. A 32. B 33. A 34. B 35. C 36. B Ethics and Professional Practice: 1. C 2. A,E 3. C 4. A 5. B 6. B 7. D 8. A 9. B 10. A 11. C 12. B 13. A,C,D,E 14. A 15. B,C,D 16. C 17. A 18. D 19. A 20. A 21. B 22. B,C Engineering Economics: 1. B 2. B 3. B 4. C 5. C 6. C 7. $5,031 8. $658 9. $2,224 per month 10. C 11. B 12. A 13. C 14. D 15. D 16. C 17. B 18. C 19. C 20. C 21. C 22. C 23. C 24. A 25. D Statics: 1. A 2. C 3. In Solution 4. A 5. ? 6. D 7. D 8. D 9. D 10. B 11. C 12. C 13. B 14. A 15. D 16. C 17. C 18. A 19. A 20. B 21. D 22. C 23. C Dynamics: 1. 2. 3. 4. 5. 6. 7. C A C D C A A Mechanics Of Materials: 1. D 2. B 3. C 4. B 5. B 6. A 7. A 8. B 9. C 10. D 11. B 12. C 13. D 14. B 15. B 16. B 17. C 18. B 19. D 20. D 21. C 22. B 23. B 24. C Materials: 1. C 2. D 3. D 4. B 5. D 6. C 7. A 8. D 9. B 10. C 11. D 12. D 13. A,D,G 14. D 15. B 16. D 17. A,C,D,F Fluid Mechanics: 1. 2. 3. 4. 5. D A D C A Surveying: 1. 2. 3. 4. 5. 6. 7. 8. 9. A A C D B C Azimuth: 145o , Bearing: S 35o E C B Water Resources and Environmental Engineering: 1. A 2. B 3. B 4. B 5. D 6. D 7. C 8. A 9. A 10. A 11. D 12. B 13. D 14. D 15. B 16. D 17. C 18. C 19. C 20. C 21. A 22. C 23. D Structural Engineering: 1. A 2. B 3. B 4. B 5. B 6. B 7. C 8. C 9. D 10. C Geotechnical Engineering: 1. D 2. B 3. B 4. B 5. B 6. C 7. C 8. C 9. C 10. B 11. B 12. C 13. C 14. D 15. B 16. B 17. A 18. D 19. C Transportation Engineering: 1. 2. 3. 4. 5. 6. 7. 8. 9. B C A D D B C B,C B Construction Engineering: 1. 2. 3. 4. 5. 6. 7. 8. 9. C A A B B C C B D