Mindanao State University- General Santos 2022 AGRICULTURAL AND BIOSYSTEMS ENGINEERING REVIEW POST TEST PART I FARM MECHANIZATION, MACHINERY, FARM POWER AND ALLIED SUBJECTS Set A 1. Machine to be designed, if possible, should have reliability a. 90% b. 95% c. 98% d. 99% e. 99.9% 2. Shock resistance of steel is increased by adding a. Nickel d. sulphur, lead and phosphorus b. chromium e. lead and chromium c. nickel and chromium 3. Kind of steel used for making tractor drawn disk plow bottoms a. Tool Steel c. Soft-centered Steel e. Molybdenum Steel b. Mild Steel d. Hot-rolled Steel 4. It is a type of material failure where the stresses in the material exceeds the material’s ultimate strength causing it to fracture into two or more parts but has undergone plastic deformation. a. Brittle fracture c. Yielding e. Caustic Embrittlement b. Ductile fracture d. Buckling 5. All are fundamental canons stated in the code of ethics of engineers except: a. Hold paramount the safety, health, and welfare of the public. b. Perform services only in areas of their competence. c. Issue public statements only in an objective and truthful manner. d. Acknowledge their errors and shall not distort or alter the facts. e. Act for each employer or client as faithful agents or trustees. 6. A two-45 cm row seeder is used to plant a 10 hectare farm at 4kph. The 8-hole seed metering device is driven by a .60 cmground wheel. If the expected plant population is 75,000 plants/ha, determine the required GW/SP speed ratio. Assume one seed/hill. a. 2.02 b. 1.81 c. 1.41 d. 1.26 e. 2.51 7. The indicated horsepower of a tractor engine is 300 hp. What is its expected power takeoff? a. 245 hp b. 257 hp c. 261 hp d. 225 hp e. 294 hp 8. Gesky Industrial Products manufactures brushless blowers for boilers, food service equipment, kilns, and fuel cells. The company borrowed ₱ 18,000,000 for a plant expansion and repaid the loan in seven annual payments of ₱3,576,420, with the first payment made 1 year after the company received the money. What was the interest rate on the loan? a. 8% b. 8.5% c. 9 % d. 9.5% e. 10% 9. A farmer decides to stop growing crop A and instead use the land to grow crop B. The amount of potential profit lost by not growing crop A represents the farmer’s a. Opportunity costs c. Marginal costs e. None of the above b. Variable costs d. Fixed costs 10. A No. 40 roller chian transmit power from a 21-tooth driving sprocket to an 84-tooth driven sprocket. The angular speed of the driving sprocket is 2000rpm. If the chain length 132 links, determine the center-to-center distance of the shaft. a. 20in c. 30in e. 50in b. 40in d. 60in 11. Find the available power for the speed ratio a. 4 b. 5 c. 6 d. 7 e. 8 12. A sliding bearing which can support steady loads without any relative motion between the journal and the bearing is called a. zero film bearing d. hydrostatic lubricated bearing b. boundary lubricated bearing e. none of the above c. hydrodynamic lubricated bearing 13. Optimizing the use of farm resources on an individual farm level is dealt in a. Farm Management c. Production economics e. Agricultural Economics b. Agricultural Marketing d. Macroeconomics 14. It is a type of material failure defined as a compressive instability that usually occurs for long members. a. Brittle fracture c. Yielding e. Spalling b. Ductile fracture d. Buckling 15. What is the power rating of Type B V-belt? a. 0.186 to 1.347 kW c. 0.764 to 18.642 kW e. None of the above b. 11.186 to 74.570 kW d. 37.285 to 186.425 16. The usual proportion for the width of key to the diameter of shaft is a. d/8 b. d/6 c. d/4 d. d/2 e. d 17. This refers to the mean of the individual bottoms’ centers of resistance each located one-fourth the width of cut to the right of the landside and the junction of the share and the moldboard a. Center of pull of the tractor d. Hitch point b. Center of plow resistance e. None of the above c. Center of gravity of the tractor 18. For walking plows, to cause the mounted plow to go deeper the plow body is tipped a. Forward c. Rearward e. To the landside b. Backward d. Sideward 19. Which of the following statements is not true about mass flow type metering devices? a. Mass flow type for crops that are usually planted at higher seeding densities. b. Mass flow type for crops that are planted in relatively narrow rows. c. Mass flow type for crops that can tolerate considerable variation in both seeding rate and uniformity of seed spacing without a significant loss in yield. d. Mass flow type for crops that are usually planted at relatively low seeding densities. e. Both c and d 20. A two-30 cm row seeder is used to plant a 10 hectare farm at 4kph. The seed metering device is driven by a 40 cm-ground wheel with a 1.45 GW/SP speed ratio. If the seedplate has 6 holes, what is the expected crop spacing within each row? a. 30.37 cm c. 51.9 cm e. 28.88 cm b. 14.44 cm d. 60.737 cm 21. It is an inter-organizational system made up of a set of interdependent activities aimed at expanding agricultural production a. Agricultural Marketing Machinery d. Agricultural Distriburions System b. Agricultural Machinery Management e. Agricultural Managment and Marketing c. Agricultural Management System 22. This aggent middleman usually does not have the physical control of the product, ordinarily follows the instructions of his principal closely and has less discretionary power in the price negotiations than the commission agents a. Broker c. Wholesaler e. Processors b. Commision Agent d. Shippers 23. When the price of a product decreases, ceteris paribus, the product becomes cheaper. It is, therefore, more attractive relative to other products (and vice versa). a. The Income Effect c. The Utility Effect e. All of the above b. The Substitution Effect d. The Price Effect 24. In operating a corn picker, this should be done a. Keep the power-takeoff shaft open b. Do not clean, grease, or adjust the machine while the power is connected c. Do not wear snug-fitting clothing d. Use a stick to push stalks through the rolls. e. Both b and d 25. Ways to reduce reaper’s harvesting losses include: a. Avoid sharp turn when cutting b. Reduce cutting speed when cutting shattering variety c. Clear the rice panicle off the upper lugs and star wheels whenever possible. d. All of the above e. Both A and B only 26. Little or no air cushion in the pressure cylinder of the knapsack sprayer would cause a. Difficulty in moving prime mover lever b. High resistance after just a few pumping strokes c. Insufficient resistance during repeated pumping d. Leaks inside the cylinder e. Leaks from the diaphragm 27. If leaks from the end of spray wand is observed when using a knapsack sprayer, what should be done? a. Replace diapragm and O-rings. b. Remove pump lever, clean and grease bushings. c. Replave tank cap with vented cap. d. Lubricate Viton collar. e. Inspect and rebuild shut-off valve. 28. The force which resists motion of the wheels over a track or field surface. a. Drawbar Force d. Unit draft b. Rolling Resistance e. None of the above c. Coefficient of Rolling Resistance 29. The automatic draft control in a modern farm tractor ___. a. automatically controls the amount of air passing through the radiator to regulate the operating temperature of the engine b. positions the implement at a constant height or depth relative to the tractor c. is the hydraulic implement hitch system which automatically raises or lowers a soil engaging implement to maintain its draft at a pre-selected value d. all of the above e. None of the above 30. A coal-fired power plant has upgraded an emission control valve. The modification costs only ₱ 8,000 and is expected to last 6 years with a ₱ 200 salvage value. The maintenance cost is expected to be high at ₱ 1700 the first year, increasing by 11% per year thereafter. Determine the equivalent present worth of the modification and maintenance cost at 8% per year. a. ₱ 15,000 c. ₱ 17,000 e. ₱ 19,000 b. ₱ 16,000 d. ₱ 18,000 Page 2 of 7 31. When total ultility increases, marginal utility is . a. Zero c. Negative e. Indeterminate b. Positive d. Constant 32. A 15 kW, 960 rpm motor has a mild steel shaft of 40 mm diameter and the extension being 75 mm. The permissible shear and crushing stresses for the mild steel key are 56 MPa and 112 MPa. The width of the key is a. 1.8 mm b. 18 mm c. 10 mm d. 20 mm e. 28 mm 33. Find the outside diameter of a hollow steel shaft to transmit 20 kW at 200 r.p.m. The ultimate shear stress for the steel may be taken as 360 MPa and a factor of safety as 8. The ratio of inside to outside diameters is 0.5. a. 30 mm b. 35 mm c. 40 mm d. 45 mm e. 50 mm 34. Determine the length of a flat-belt pulley drive having the following data: diameter of first pulley, 500 mm; diameter of second pulley, 600 mm; and center distance of the pulley shaft, 5 meters a. 9.84 m c. 5.68 m e. 11.73 m b. 9.68 m d. 10.54 m 35. Chain lubrication in which the lower strand of chain runs through a sump of oil in the drive housing a. Manual Lubrication c. Bath Lubrication e. All of the above b. Drip Lubrication d. Oil Stream Lubrication 36. The following are advantages of subsurface tillage except a. Reduction in the capacity of the soil to absorb water d. Reduction of rate of surface evaporation b. Reduction of runoff e. Reduction of crop cultivation to kill weed c. Reduction of soil and water erosion 37. Typical diesel engine power requirement of power tiller used for plowing and harrowing rice field? a. 7 hp b. 10 hp c. 12 hp d. 16 hp e. 18 hp 38. A sprayer with a pressurized liquid tank and in which the discharge is carried out with the air pressure created in advance by built-in pump or from outside a. Continuous sprayer d. Compression Sprayer – Non-pressure retaining b. Compression sprayer type c. Knapsack sprayer e. None of the above 39. Which of the following statement is not true about cultivation? a. It helps retain moisture by killing weeds and draining rainfall. b. It aids in developing plant food. c. It aerates the soil to allow oxygen to penentrate. d. Promote activity or microorganism. e. Both b and d 40. Minimum area required for testing manually-operated seeder. a. Not less than 100m2 d. Not less than 1500m2 b. Not less than 500m2 e. No limitation in filed area 2 c. Not less than 1000m 41. Gauge wheels control the ____. a. depth of penetration of shovel d. All of the above b. size of the cultivator e. None of the above c. attachment for the application of fertilizer 42. An axial-flow type which is similar with the portable thresher with oscillating screen but larger in size usually equipped with support wheel for ease of transport. a. Portable thresher with oscillating screen c. Mobile axial-flow thresher b. Portable axial-flow thresher without d. Through-flow Thresher oscillating screen e. None of the above 43. What is the Specific fuel consumption of an engine that uses has brake thermal efficiency of 21.20%. The fuel contains 20,000 BTU/lb. a. 0.5 lb/hp-hr c. 0.6 lb/hp-hr e. None of the above b. 0.55 lb/hp-hr d. 0.65 lb/hp/hr 44. A four-stroke-cycle diesel engine, with three cylinders, has 89-mm cylinder bore. Its compression ratio is 16:1 and it is running at 2000 rpm speed. If the piston displacement in each cylinder id 808.75 cc, what is the length of the each stroke? a. 115 mm b. 120 mm c. 125 mm d. 130 mm e. 135 mm 45. RK Series Mitsubishi engines commonly used for power tillers basically are ___ water-cooled-type engines. a. horizontal c. Rotary e. diagonal b. vertical d. spiral 46. In what order do managers typically perform the managerial functions? a. Organizing, planning, controlling, leading d. Planning, organizing, controlling, leading b. Organizing, leading, planning, controlling e. None of the mentioned c. Planning, organizing, leading, controlling 47. What are the three interpersonal roles of managers? a. Figurehead, leader, liaison d. Communicator, organizer, spokeperson b. Spokeperson, leader, coordinator e. None of the mentioned c. Director, coordinator, disseminator 48. Stoichiometric air requirement of rice husks. a. 4.7 kg air per kg fuel c. 6.2 kg air per kg fuel e. 8.7 kg air per kg fuel b. 5.7 kg air per kg fuel d. 7.3 kg air per kg fuel Page 3 of 7 49. The firing order of inline 8 cylinder engine is a. 1-2-3-4-5-6-7-8 c. 1-5-4-8-7-2-6-3 e. 1-3-5-7-2-4-6-8 b. 1-4-3-6-8-2-5-7 d. 1-3-4-8-7-2-5-6 50. A ball bearing subjected to a radial load of 5 kN is expected to have a life of 8000 hours at 1450 rpm with a reliability of 99%. Calculate the dynamic load capacity of the bearing so that it can be selected from the manufacturer's catalogue based on a reliability of 90%. a. 86.5 kN c. 43.87 kN e. None of the mentioned b. 44.31 kN d. 68.5kN 51. Compute the drawbar horsepower of a 4-bottom moldboard plow on a clay loam soil having 0.3m effective width-of-cut per bottom and 0.15m depth-of-cut. Theplowing speed is 10 kph. (Soil draft for clay loam soil isassumed at 8 psi). a. 36.9 kW c. 19.96 kW e. 38.5kW b. 27.14 kW d. 50.17 kW 52. Monitoring body for the service warranty provided by the assemblers, manufacturers, importers, suppliers, distributors, and dealers of agri-fisheries machines under AFMech Law. a. AMTEC and BAFE c. LGU and BAFE e. Both A and C b. PSAE and AMTEC d. None of the above 53. In the code of ethics for engineers the following are rules of practice except a. Engineers shall hold paramount the safety, health, and welfare of the public. b. Engineers shall perform services only in the areas of their competence. c. Engineers shall issue public statements only in an objective and truthful manner. d. Engineers shall be guided in all their relations by the highest standards of honesty and integrity. e. Engineers shall act for each employer or client as faithful agents or trustees. 54. What is the expected draft of a 4-40 cm plow travelling at 8kph in a sandy soil? The depth of plowing will be 20 cm. For sandy silt, C1= 3 and C2= 0.056. a. 11.03 kN c. 4.30 kN e. 9.78 kN b. 21.07 kN d. 8.38 kN 55. What is the required drawbar power to plow a field using a 4-40 cm plow travelling at 8kph in a sandy soil? The depth of plowing will be 20 cm. For sandy silt, C1= 3 and C2= 0.056. a. 21.73 kW c. 46.82 kW e. 9.56 kW b. 18.62 kW d. 24.51 kW 56. Maxion Tractor is made from a. Finland c. USA e. Korea b. Brazil d. France 57. The perpendicular distance between the upper hitch point and the common axis of the lower hitch point of the tractor. a. Mast height c. Stud height e. None of the above b. Hitch vertical height d. Overall height 58. Process of planning and executing the conception, pricing, promotion and distribution of ideas, goods, and services to create exchange and satisfy the individual and organizational goals. a. Management c. Marketing e. None of the above b. Economics d. Prodduction 59. What is the term “rule of thumb” type of bias in decision making? a. Framing bias c. Over-confidence e. None of the b. Hindsight bias bias mentioned d. Heuristics 60. Axial flow rice thresher basically are powered by gasoline engine a. 14 hp b. 16 hp c. 18 hp d. 22 hp e. 24 hp 61. An axial flow rice thresher typically has a capacity of a. 0.17 ha/hr c. 0.33 ha/hr e. I ha/hr b. 0.25 ha/hr d. 0.5 ha/hr During lab research, three equal-service machines need to be evaluated economically. The MARR is 10% per year. Electric-Powered Gas-Powered Solar-Powered First cost, ₱ 4500 3500 6000 Annual operating cost (AOC), ₱/year 900 700 50 Salvage value S, ₱ 200 350 100 Life, years 8 8 8 62. The present worth of the solar-powered machine is a. -9208 c. -6220 e. -6313 b. -7071 d. -6050 63. The present worth of electric-powered machine is a. -9208 c. -6220 e. -6313 b. -7071 d. -5200 64. Which should be selected if present worth method is used? a. Electric-powered machine d. A or B b. Gas-powered machine e. A or C c. Solar-powered machine Page 4 of 7 65. Moldboard plow accessory primarily used to cut through the surface residues, encabling more complete coverage of surface trash. a. Jointers c. Trashwires e. Disk Jointers b. Coverboards d. Rolling coulters 66. A four-stroke, four-cylinder biomass gas producer engine has 8-inches cylinder bore and 12-inches stroke. If the engine is running at 500 rpm speed with a mean effective pressure of 25psi. The indicated horsepower is a. 28.33hp c. 45.70hp e. 91.39hp b. 38.07hp d. 76.16hp 67. Which of the following statements is true? a. At 1st gear position, the engine speed is faster than the machine being driven. b. At 2nd gear position, the engine speed is faster than the machine being driven. c. At 4th gear position, the engine speed is slower than the engine being driven. d. All of the above e. None of the above 68. The following should be done for the maintenance and care of planters except a. Calibrate the seed metering system b. Check to determine if the presswheels are functioning properly c. Roller chains should be removed, tagged, and stored in a can of light oil d. Detachable links chain should be stored free from oil. e. Store in a shed or cover with plastic or canvass sheets 69. The process of placing seeds in holes made in seedbed and covering them. a. Broadcasting c. Drilling e. Checkrow planting b. Dibbling d. Hilldropping 70. When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as a. angular bevel gears c. internal bevel gears e. none of the above b. crown bevel gears d. mitre gears 71. This will be a business enterprise under the AFMech Law aimed to provide farmers after-sales service and warranty, provide custom farm mechanization services, and services on repair and trouble shooting, as well as training on maintenance and proper use of agricultural machinery and equipment. a. Farmer ’s Machines Service Centers b. Agri-fisheries Machinery and Equipment Service Centers c. Farm Machines Service Center d. All of the above e. None of the above 72. Aerosol generator is a mechanical device that produces a liquid dispersion having a volume meadian diameter of less than a. 25 μm b. 50 μm c. 75 μm d. 100 μm e. 125 μm 73. If a boom sprayer has 6 nozzles spaced 1m apart and each nozzle discharges 0.6 li/ min, what is the application rate if the walking speed is 25 m/min? a. 240li/ha c. 480li/ha e. 500li/ha b. 120li/ha d. 360li/ha 74. All of the following are examples of cash outflows, except : a. Asset salvage value c. Operating cost of asset e. None of the above b. Income taxes d. First cost of asset 75. A hydro tiller is to be designed to have a width of cut of 1.2 m and to be driven at a puddler speed of 250 rpm. The design speed of travel is 10 kph with field efficiency of 80%, a sprocket ratio of 1:6 and peak transmission efficiency of 90%. Determine the field capacity. a. 1.35ha/hr c. 1.00ha/hr e. 0.864ha/hr b. 1.08ha/hr d. 0.96ha/hr 76. The following are benefits of mechanization except a. Contracts the Demand for Work Animals for ploughing, water lifting, harvesting, transport etc. b. Brings in other Improvements in Agricultural Technique. c. Modifies Social Structure in Rural Areas. d. Leads to Commercial Agriculture. e. Creates the Problem of Labor Shortage. 77. Which of the following is a condition necessary for farm mechanization? a. Mechanization must result in more production at lower cost than the traditional method – to justify the equipment cost, divert displaced labor to more productive operations b. Mechanization must assist labor to overcome peak energy requirements which are in excess of manpower available c. Mechanization must replace time and energy efficiently – should be less than those required with the use of hand tools d. All of the above e. Both A and C only 78. AFMA focuses on the following major concern except a. poverty alleviation and social equity d. sustainable development b. food security e. farm mechanization c. global competitiveness Page 5 of 7 79. National Agri-fishery Mechanization Program is created under RA 10601 to do the following except: a. Promote and support through the provision of research grants, credit, transparent and predictable regulation, the local development and manufacture of agricultural and fisheries machinery by the private sector; b. Unify, lead and support the efforts of various institutions in the research, design and development of agricultural and fisheries machinery; c. Strengthen support services such as credit faculties, research, training and extension programs, rural infrastructures, postharvest facilities and marketing services d. Establish quality, safety and performance standards for agricultural and fisheries machinery; e. Support the establishment of quality, safety and performance testing centers for the certification of agricultural and fisheries machinery in strategic localities in the country 80. This refers to a detailed and comprehensive document that describes all technical procedures related to product development a. Contracts c. Technical Specifications e. Methods of Test b. Standards d. Codes 81. Which of the following is not part of the machine categories of PAES? a. Production MAchinery d. Farm-to-Market Roads b. Irrigation Structures e. Postharvest Machinery c. Engineering MAterials 82. The area with lowest level of mechanization level. a. Nueva Ecija c. Pangasinan e. Kalinga b. Nueva Viscaya d. Iloilo 83. Which of the following is a method for controlling weeds? a. Cultivation by stirring the soil. d. All of the above b. Use of flame and chemical. e. Both A and C c. Laying of plastic strips over the row. 84. Accordingt o PNS/BAFS/PAES 192:2016, repair of defective units and provision of other after sales services shall be undertaken within ______ upon the receipt of complaints. a. 24 hours c. 48 hours e. 72 hours b. 36 hours d. 60 hours 85. The standard for the Technical Means for Ensuring safety – Guidelines is . a. PNS/BAFS 330:2022 c. PNS/BAFS 332:2022 e. PNS/BAFS 301:2022 b. PNS/BAFS 331:2022 d. PNS/BAFS 333:2022 86. Based on the PNS/BAFS for Knapsack Sprayer – Methods of Test, this test is carried out to evaluate the strength and durability of the sprayer a. Valve Reliability Test c. Drop Test e. Liquid Spillage Test b. Pressure Test d. Absorbency Test 87. Tractors with PTO power rating of 110-350kW at rated rotational frequency of engine ( determined by ISO 789-1) are categorized (based on the categories of rear- mounted three- point linkage) as a. 1N c. 3N/3 e. 1 b. 2N/2 d. 4N/N 88. The - ratio of the milling recovery from the test rice mill to that from the laboratory whitener. a. Total Milling Recovery b. Total Milling Recovery Index c. Broken Milled Rice Index d. Head Milled Rice Recovery Index e. Milling Degree 89. A forage chopper that uses a feeding mechanism consisting of four or more feed rolls to partially orient and advance the crop at a consistent rate into the cutting mechanism producing the shortest and most uniformly cut particles a. Precision-cut c. Random-cut e. Throw-away b. Semi-precision cut d. Blow-up 90. For safety purposes, slow-moving vehicles such as agricultural machines must be provided with ___. a. rear bumper to protect the machine from impact b. identification emblem to guide motorists that the machine is slow moving c. signal light when travelling d. All of the above e. None of the above 91. This term refers to how frequent the motor is started and how long it will run each time it is started. a. Duty Rating c. Running Time e. Ampacity b. Manufcturers Rating d. Phase 92. This represents the interrelationship between capacity, head, power, NPSH, and efficiency of the pump. a. Total Dynamic Head d. Pump Dynamic Head Curve b. Pump Performance Curve e. None of the above c. Pump Selection Curve 93. Compute for the rest period of woman doing weeding if the gross power required in weeding is 1/2hp. a. 30.00 min/hr d. 15. 28 min/hr b. 29.48 min/hr e. 10.00 min/hr c. 19.77 min/hr Page 6 of 7 94. Transmission efficiency is a function of: a. belt tightness, b. diameter and class of pulleys c. type of belt d. magnitude of power being transmitted. e. All of the above 95. This acts as second speed reduction point in the power train a. Gear drive b. Differential c. Clutch d. Governor e. Flywheel 96. A detailed, precise diagram or plan that conveys information about how an object functions or constructed. a. Engineering drawing b. Technical specifications c. Methods of tests d. Standards e. Codes 97. The sorting of products into lots or units according to one or more of its attributes a. Grading b. Standardization c. Separation d. Culling e. None of the above 98. Determine the fuel consumption rate of a deisel engine if the fuel equivalent power is 770kW The density of the fuel is 0.835kg/L andits heating value is 45.434kJ/kg. Calculate the fuel equivalent power. a. 19.3L/h b. 73.1L/h c. 50.2L/h d. 25.0L/h e. 48.7L/h 99. When trooubleshooting, we should look at the a. FACTS b. BLOW BAGETS c. BIGSHOW d. AMTEC e. AMDP 100. Which of the following is a category of caontract as to completion status? a. Executory b. Under seal c. Implied d. Void e. Two-party Page 7 of 7