Philippine Institute of Chemical Engineers – Laguna
Secretariat Office: Department of Chemical Engineering
University of the Philippines Los Baños
College, Laguna, 4031 Philippines
Telefax (049)536-7759, e-mail: mmn@mudspring.uplb.edu.ph
SAMPLE BOARD EXAM QUESTIONS/PROBLEMS
PHYSICAL AND CHEMICAL PRINCIPLES
General Chemistry
1.
2.
3.
What is the chemical name of muriatic acid?
Chemical name of sal soda/washing soda?
Given half-life of C-14 to N-14 and initial rate of decay. What is the age of a sample given its
rate of decay?
4.
What is Kf of MgO? (Problem on colligative property)
5.
Which comes primarily from sea MgO
a) Ca
b) Ba
c) Cu
d) Mg
6.
Which will give a buffer of pH 2?
7.
Which element is dark, has metallic luster and sublimes
a) chlorine
b) fluorine
c) iodine
d) bromine
8.
Ionization Energy - trends
9.
Stoichiometry
10. Bonds, which are symmetrical with the line that connects the nuclei
11. Given n = 2. How many orbitals?
12. MW of a compound (tetrahydrate)
13. Pale yellow gas used in pesticides
14. pOH of 0.018 M HCl
15. Oil Of vitriol
16. If half life is independent of initial conc., the order is
17. Chemical equil: Given V, T, P Find n, total moles at equil. = 6.2
2SO2 + O2 = 2SO3
[SO2] = [SO3] at equilibrium
18. What is needed in scaling mercury filled thermometer
a) freezer
b) beaker of water
c) bunsen burner
d) bucket of ice
19. Artificial air for diving
20. Find MW of protein from colligative property- osmotic pressure
21. Cheese- what type of mixture?
22. Combustion reaction is exothermic
a)all
b)none
c)some
23. Redox reaction: MnO4- + H+ + Cl- = Mn + Cl2 + H2O. Which is the reducing agent ? oxidizing
agent? The ratio of H+ to Cl2?
24. %O2 in air
25. Definition of foam
26. Stoichiometry: CaCO3 + HCl = CO2 ; Given volume of CO2, find mass of CaCO3
27. Def. of Temp (Ans: Ave KE)
28. Driving force in precipitation
29. Periodic trend: F, Cl, S; arrange in decreasing size, increasing electronegativity, increasing
ionization energy
30. For measurement of pressure, what conversion factor is needed?
31. Which is a nonmetal ?
a) Al
b) Ni
c) Rb
d) Mg
32. How many s orbital for n level?
32. Which is the most electronegative?
33. HOCl, H2O, H2C2O4 , H2SO4 : arrange according to the ability to release proton
34. About Graham’s law of diffusion
35. Which transformation shows a reduction in kinetic energy?
a. liquid to gas
b. gas to liquid
c. solid to liquid
d. solid to gas
36. Metals have electronegativity less than
a) 5
b) 4
c) 2
d) 3
37. When 19.06 grams of CS2 is reacted with excess O2, CO2 and SO2, are formed. Find the mass of
SO2 formed.
a) 24
b) 48
c) 32
d) 16
38.
Jellies and most paints are examples of
a) foam
b) emulsion c) sol
d) aerosol
39. There are ______ kinds of pure substances.
a) 3
b) 2
c) 5
d) 4
40. The contribution of the electron to the atomic weight is
a) equal to that of the proton
c) zero
b) equal to that of the neutron
d) 1/1837 time of proton and neutrons
42. A 0.010 F weak acid is 4.17% ionized. What is the ionization constant?
a) 1.8 x 10-5
b) 3.6 x 10-5
c) 1.2 x 10-4
d) 1.2 x 10-5
43. Robert Boyle established the ________________
a) freezing point
b) saturation temp
c) boiling point
d) dew point
44. Hydrogen consists about ______ % of the earth’s crust
a) less than 0.5%
b) about 5%
c) greater than 5%
d) about 1%
45. Ernest Rutherford detected and named the radioactive element __________.
a) Thallium
b) Selenium
c) Scandium
d) Thorium
46. Colligative properties depend on
a) no. of solute particles
c) nature of solute
b) temperature of solution
d) nature of solvent
47. ________ is the Greek word for “salt-forming”.
a) actinides
b) halogen
c) lanthanide
d) transition
48. What weight of AgNO3 is required to precipitate the chlorides in a 750 ml solution of 14% BaCl2?
a) 256 mg
b) 342 mg
c) 86 mg
d) 171 mg
49. At equilibrium a 1-liter reactor contains 0.3 mol of A, 0.1 mol of B and 0.6 mol of C, according to the
equation.
A+B ↔ C
If 0.4 mol of A was added to this system, how many moles of A was left after equilibrium was reestablished?
a) 0.65
b) 0.05
c) 0.35
d) 0.70
50. If 0.3 mol of B was added to the system described, how many moles of B was left at equilibrium?
a) 0.15
b) 0.25
c) 0.4
d) 0.10
51. If 0.2 mol of C was added how many moles of C was left at equilibrium?
52. The no. of degrees of freedom of an ethanol-water system in equilibrium with its vapor
a) 3
b) 1
c) 2
d) zero
53. A 0.0722 M acid has pH of 3.11, what is the Ka of the acid?
-6
-6
-7
a) 4.2 x 10
b) 8.4 x 10
c) 8.4 x 10
d) 4.2 x 10-7
54. Aqua regia is a mixture of
a) HCl and perchloric acid
c) Nitric and perchloric acid
b) Nitric and HCl
d) HCl, HNO3 and perchloric
55. What weight in grams of KMnO4 is needed to form a 250 ml solution of 0.10 M?
a) 47.5
b) 2.75
c) 3.95 g
d) 89.5 g
56. A 1 liter vessel established equilibrium with the following reaction
2SO2 + O2 ↔ 2SO3
SO2 has 0.11 mole, O2 has 0.05 mole and SO3 has 0.12 mole. Another 1 liter vessel is used and
contains initially of 96 g of SO2 how much O2 (in grams) must be added, if at equilibrium, one-half of SO2
will be converted to SO3.
a) 6.0
b) 13.34
c) 9.304
d) 9.6
Who discovered the positron?
Who discovered oxygen?
a) W. Scheele
b) Joseph Priestley
c) John Dalton
d)Antoine Lavosier
59. Who stated that the properties of elements are periodic function of their atomic weights not atomic
number?
a) E. Rutherford
b) D. Mendeleev
c) H. Moseley
d)Neils Bohr
60. Who discovered radium?
a) Marie Curie
b) Ernest Rutherford
c) John Priestley
d) John Dalton
61. 18.7 g of unknown acid is reacted with zinc to produce 800 cc of H2 gas at STP. What is the
equivalent weight of the acid?
a) 624
b) 262
c) 173
d) 131
62. Convert 60 ergs to microjoule
a) 3
b) 6
c) 600
d) .06
63. What is the boiling point of O2?
64. What is the density of a 50% aqueous solution of H2SO4 at 20°C?
65. Colloidal dispersions has _______ phases while a suspension has ______ phases.
a) 1 and 2
b) 2 and 1
c) 1 and 1
d) 2 and 2
57.
58.
SAMPLE BOARD EXAM QUESTIONS
66.
What is the formula of Epsom salt?
a) Na3SO4.10H2O
b) Ferrous sulfate
c) Aluminum sulfate
d) MgSO4.7H2)
67. What is kaolinite?
a) Aluminum silicate
b) MgSO4.7H2O
c) KCl
d) Magnesium silicate
68. What is green vitriol?
a) CuSO4
b) Ferrous sulfate
c) MgSO4.7H2O
d) NasSO4.10H2O
69. Which of the following is covalently bonded?
a) MgO
b) KCl
c) NaCl
70. Mayonnaise and milk are examples of
a) emulsion
b) suspension
c) colloid
d) mixture
71. Which of the following has no definite structure?
a) crystalline
b) amphoteric
c) amorphous
d) allotrope
72. A 0.010 F weak acid is 4.17% ionized. What is the ionization constant?
a) 1.8 x 10-5
b) 3.6 x 10-5
c) 1.2 x 10-4
d) 1.2 x 10-5
73. Robert Boyle established the ________________
a) freezing pt
b) saturation temp
c) boiling pt
d) dew point
74. At a given temperature, a liter reaction vessel contain 0.30 mole of A, 0.10 mole of B, and 0.60
mole of C, which follows the reaction A + B C. Find the following:
#mole of A when 0.40 mole of A added
#mole of B when 0.30 mole of B added
#mole of C when 0.20 mole of C added
75. The equilibrium constant of the reaction 2x + y. 2z is 6.0 liter/mole at 600°C. A quantity of “z”
gas is placed in a liter reaction vessel at 600°C. When the system reached a state of
equilibrium the vessel was found to contain 1.5 mole of “y” gas. How many moles of z were
originally placed in the reaction?
a. 6
b. 16
c. 3
d. 12
76. A reaction system in equilibrium according to equation 2SO2 + O2 = 2SO3 in a liter reaction
vessel at a given temperature was found to contain 0.11 moles of SO 2, 0.05 moles of O2, and
0.12 moles of SO3. Another liter reaction vessel contains 96 gm of SO2 at the above
temperature. How many gm of O2 must be added to the vessel in order that at equilibrium ½
of SO2 oxidized to SO3?
a. 48
b. 13.344
c. 9.340
d. 9.60
77. Ideal gas law calculation – unknown density
78. Element with the least amount in the earth’s crust
a. Si
b. Mg
c. P
d. S
79. Which does not react in acid?
a. Gold
b. Iron
80. What is the chemical name of chlorox?
a. Hydrochloric acid
b. Sodium hypochlorite
85. What element is present in Epsom salt but not in milk of magnesia?
a. H
b. O
c. S
d. Mg
82. Which among the following elements is not found in elemental form?
a. Na
b. P
c. N
83. Common form of sugar
a. fructose
b. glucose
c. sucrose
d. lactose
84. Which is true about atomic mass of an element?
a.
mass of protons plus mass of neutrons
b. mass of electrons plus mass of neutrons
b.
total number of nucleons in nucleus
c.
difference in neutrons and protons
85. What is the correct formula for Nitrogen(IV) oxide?
a. N2O4
b. N2O2
c. NO2
d. N2O
86. Compute for the heat of combustion of ethane.
87. CH2O – Formaldehyde
KOH –Lye
88. % Argon in the atmosphere – 0.93- 0.94%
89. Karat of a pure Gold- 24K
90. Gas Responsible for greenhouse effect- CO2
91. Harmful / toxic gas- Ammonia
2
92.
93.
94.
95.
96.
97.
98.
99.
100.
101.
102.
103.
104.
105.
106.
107.
108.
109.
110.
111.
112.
Foul Smelling Gas- H2S/ N2S
Two different thermometer used to measure the temp of a substance, When the thermometerare
brought into contact, what will happen?
Phenolpthalein/ Other indicators
-color in basic and acidic solution
Which is the most reactive: K, Li
What element is used in making batteries, lead and _________; choice: antimony.
Periodic table, how many periods?
What halogen is in period 3
Which has the largest electronegativity?
Which is the lightest metal?
Which has high electronegativity: ionic, covalent, H-bonding, metallic
Force that hold oppositely charged: ionic
Which is which? Ice is less dense than liquid water
Which has the largest kinetic energy? Choices: solid to liquid, gas to liquid
Which is 3 dimentional? Graphite, diamond, coal, coke
Choices: ozone, Ca, H2, graphite
Which is in its simplest form: element, solid, liquid, gas
Lowest pH: NaCl, NaCH3COOChemical name of Teflon
About Graham’s Law of Diffusion
6.02 x 1023 ions is equivalent to _________mole Na2CO3
Where can you extract magnesium: seawater, corals, seashells, balonite
ORGANIC CHEMISTRY
1.
CaCl2 cannot be used as a desiccant for
a) alkane
b) alkyne
c) alcohol
d) ether
2.
In organic chemistry, what is reduction?
3.
Bonds which are symmetrical with the line that connects the nuclei
4.
Given n = 2. How many orbitals?
5.
IUPAC name of ethylene
6.
No. of possible structures of 6-carbon-alkane
7.
In organic chemistry, what is reduction?
8.
Bonds, which are symmetrical with the line that connects the nuclei
9.
Given n = 2. How many orbitals?
10. IUPAC name of ethylene
11. No. of possible structures of 6-carbon-alkane
12. Nomenclature of acetic anhydride CH3CO-O-CH3About alkynes…. Liquid or gas at room temp ?
13. About Lucas test
14. C4H10O, about isomers
15. About functional group (CH3)
16. About ascorbic acid (structure)
17. Which is not a benzene derivative?
a) phenanthrene
b) anthracene
c) bromoethene
d) naphthalene
18. The formula of
acrynitrile
a) C3H4N
b) C3H5N2
c) C3H3N
d) C2H6N
18.
Wurtz synthesis
19.
Obtained from methane on the action of Cl2
a) dichlorodifluoromethane
c) carbon tetrachloride
b) chloroform
d) chloromethane
20.
Carbon number is ________
a) no. of carbon impurities
c) no. of carbon compounds
b) no. of carbon atom
d) no. of carbon mixtures
21.
Structure of acetamide
22.
Give the name of the following structure
SAMPLE BOARD EXAM QUESTIONS
CH3
3
CH2CH3
8.
CH2-CH-CH2CH2-CH2C-CH3
9.
CH3
a) 2,6-dimethyl-6-ethylhexane
23.
24.
10.
b) 2,6,6-trimethyloctane
Which of the following is a primary alcohol?
a) isoamyl alcohol
b) phenol
Name the compound
CH3
11.
c) tert-butyl alcohol
d) isopropyl alcohol
12.
CH3 – CH3 – CH3
13.
CH3
25.
26.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
a) iso-pentane
b) neo-pentane
c) n-pentane
How many sigma bonds are there in ethylene?
a) 2
b) 3
c) 1
Which of the following is a derivative of carboxylic acid?
a) arpine
b) ester
c) aldehyde
How many isomers does pentane have?
a. 1
b. 2
c. 3
d. 4
How many grams of C is found in formaldehyde?
Alcoholic beverage from distilled wine/ fruit juice- BRANDY
Polymer used in rubber- STYRENE
No. of Hydrogen given name of a compound (eg: 2,2- dimethylbutane)
Aromatic Hydrocarbons
No. of isomers of propane
Reaction Undergone by alcohol (substitution and elimination)
Lucas Reagents (HCl, ZnCl2)
a.
Components
b. what for?
Which of the following is the most acidic?
Which is a polymer: Teflon
Enzyme in papaya: papain
Which are 2 types of alkenes
Which is a primary alcohol
Which is an intermediate prod of nucleophilic reaction: aldol, enol
Choices: isoamylene, ethylethylene
d) iso-butane
14.
d) more than 3
15.
d) alcohol
16.
ANALYTICAL CHEMISTRY
1.
Hardest to filter
a) isomorphous
b)gelatinous
c)crystalline
d) curdy precipitates
2.
Color of methyl orange at pH= 8
3.
Driving force in precipitation
4.
Find density of a mixture given its molality
5.
Which among the following has the the highest purity?
a.
Primary standard
b. USP reagent
6.
What is the color f litmus paper in acid?
a. blue
b. red
c. orange
d. colorless
7.
Calculate the molar analytical concentration of solute when 2.5 grams of KH(IO 3)2 is dissolved
and diluted to 500 mL.
a) 0.00641 M
b) 0.01282 M
c) 0.02564 M
d) 0.03846 M
5.
Brix scale is the hydrometer scale for
a) gasoline
b) sugar solution c) liquefied propane gas
d) water
6.
A 0.010 F weak acid is 4.17% ionized. What is the ionization constant?
-5
-5
-4
a) 1.8 x 10
b) 3.6 x 10
c) 1.2 x 10
d) 1.2 x 10-5
7.
The most commonly used reagent in the standardization of acids
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
a) K2SO4
b) Borax
c) BaCl2
d) Na2CO3
The practical method of coagulation is
a) increasing the temperature
c) digestion
b) agitating or stirring
d) all of the above
A 0.0722 M acid has pH of 3.11, what is the Ka of the acid?
a) 4.2 x 10-6
b) 8.4 x 10-6
c) 8.4 x 10-7
d) 4.2 x 10-7
What weight in grams of KMnO4 is needed to form a 250 ml solution of 0.10 M?
a) 47.5
b) 2.75
c) 3.95 g
d) 89.5 g
In a redox reaction, you need
a)
a strong oxidizing agent and a weak reducing agent
b)
a strong reducing agent and a weak oxidizing agent
c)
a strong oxidizing agent and a strong reducing agent
d)
a weak oxidizing agent and weak reducing agent
A 0.010 F weak acid is 4.17% ionized. What is the ionization constant?
a) 1.8 x 10-5
b) 3.6 x 10-5
c) 1.2 x 10-4
d) 1.2 x 10-5
Sixteen grams of a mixture of sodium and potassium is neutralized with ____ moles of H 2SO4. How
many grams of potassium is present in the mixture?
Twenty milliliters of a 0.125M HCl is mixed with 25 mL of 0.120M NH 3. What is the resulting pH of
the mixture?
Phenolpthalein/ Other indicators
-color in basic and acidic solution
Mohr Method
a.
Definition ( a direct analysis of Halide)
b. Analyte, titrant
Volhard Method
15ml of acid is needed to reach the phenolphthalein endpoint, additional 30ml was used
to reach the methyl orange. What is the combination?.
What is the color of methyl orange in acids?
Base color thymol blue
Acid color methyl orange
What is the ratio of acetate to acetic acid if the pH of the solution is 4.5?
A 0.5L flask has 0.5 moles A, 0.3 moles B, and 0.6 moles C according to the reaction AB → C. Find
the equilibrium constant.
Which falls sa range 0.1-1: choices: gravimetry, gasometry
Which is an emulsion: starch or butter
Choices: reagent grade, analytical grade, USP
Problem using c1v1=c2v2
Find normality
Choices: elementary reaction, enzymatic reaction, catalytic reaction
What is present in hard water: salt and minerals
What causes hardness in water: calcium, magnesium, phosphorus?
What lowers activation energy?
Problem which uses ebullioscopic constant Kb
PHYSICAL CHEMISTRY
1.
A solution is prepared by dissolving 184 grams of ethanol in 1 gmol of glycerol. What is the vapor
pressure of the resulting solution if the vapor pressure of pure ethanol at the working temperature
is 200 mmHg? Assume that glycerol is non-volatile at this temperature.
a) 80
b) 160
c) 200
d) 120
2.
3.
4.
5.
6.
The Cv of polyatomic substances like CH4, NO2 and NH3
a) 4-8 cal/mol-°C
b) less than 8
c) slightly greater than 6
d) about 8
How many independent variables must be specified in order to define completely a system of pure
liquid water?
a) 2
b) 1
c) zero
d) more than 3
The no. of degrees of freedom of an ethanol-water system in equilibrium with its vapor
a) 3
b) 1
c) 2
d) zero
What is the relative humidity of air-water mixture if the vapor has a partial pressure of 11.6 mmHg
at 20°C?
1.05 x 106 KJ of heat is added to 22.8 Kmoles of methane flowing at steady state at a temperature
of 200°C. What is the change in enthalpy of KJ/k-mole?
SAMPLE BOARD EXAM QUESTIONS
7.
8.
9.
10.
11.
12.
13.
14.
15.
What is the heat needed to raise 1 molecule of water by 10°C (in ergs)?
a) 1.3 x 10-14
b) 2.5 x 10-12
c) 2.6 x 10-14
d) 1.3 x 10-12
5.28 cal of heat is needed to raise the temperature of 1 g of water from 100°C to 110°C.
What is the molar heat capacity of water?
a) 9
b) 6
c) 12
d) 3.0
18.7 g of unknown acid is reacted with zinc to produce 800 cc of H2 gas at STP. What is the
equivalent weight of the acid?
a) 624
b) 262
c) 173
d) 131
Convert 60 ergs to microjoule
a) 3
b) 6
c) 600
d) .06
What is the boiling point of O2?
The enthalpy is a function of
a) Temp and pressure
b) pressure only
c) temp only
d) none of these
Given molecules of CO2, what is the volume of the gas at STP?
Given 2 values in °F, what is the difference between the to values in Kelvin scale?
Given ideal gas with constant heat capacity as follows:
Cv = 5
Cp = 7 BTU/lbmole °F
initial condition is at 1 atm (abs) and 60°F . It is compressed to a final condition of 6 atm and
60°F by cooling at constant temperature then heating at constant volume. Find work, final
volume, and temperature after cooling.
14.
15.
16.
17.
18.
Heat amounting to 1.055 x 106 kg is added to 22.68 kmole of CH3 initially at 260°C in a
steady flow heat exchanger at approximately atmospheric pressure. What is he change in
enthalpy of CH3 in KJ/kmole?
a. 32560
b. 46577
c. 34562
d. 62340
The most commonly used equation of state
a. Ideal gas equation
b. van der Waals
Heat of Reaction- ENTHALPY
Problem which uses Q=mCpdT
Choices: azeotropic, eutectic, critical point, triple point
THERMODYNAMICS
1.
Adiabatic const; Given W
2.
Heat amounting to 1.055 x 106 kg is added to 22.68 kmole of CH3 initially at 260°C in a
steady flow heat exchanger at approximately atmospheric pressure. What is the change in
enthalpy of CH3 in KJ/kmole?
a. 32560 b. 46577 c. 34562 d. 62340
3.
4.
5.
6.
Thermodynamics: Given P1,V1,T1 and P2,V2,T2
Find Q and H for polytropic process of compressed steam
Given heat rejected, find work done
1000 gal/min of water is cascading down a height of 100 ft from a reservoir. If half of the
energy generated is converted to electrical energy, how many 100-watts bulb can be lighted
in 30 seconds
ENVIRONMENTAL ENGINEERING
1. Octane number refers to the amount of this substance.
a.
Isooctane
b.
2,4,4-trimethylpentane
c.
heptane
d.
2,3-dimethylhexane
2. Strong waste has a BOD of:
a. 1000
b. 2000
c. 3000
d. 4000
3. About digestion
4. Strong water in DAO 34 or 35: choices: 1000, 2000, 3000 ppm
5. COD means
a) kind of fish
c) biochemical oxygen demand
b) Chemical oxygen demand
d) cash on delivery
4
6.
7.
Def. of environmental management
Shallow ponds less than 1 meter in depth, where dissolved oxygen is maintained throughout the
entire depth mainly by the action of photosynthesis.
a)facultative ponds
b)anaerobic ponds
c) aerobic ponds
d) aerated lagoons
8.
________ is a general term denoting any wastewater partially, completely treated or in its natural
state flowing out of the manufacturing plant, industrial plant or treatment plant.
a) Discharge
b) Sewage
c)Industrial waste
d) Effluent
9.
_________ refers to public water supply, that will require complete treatment (coagulation,
sedimentation, filtration, disinfection) in order to meet national standards for drinking water
a) Class AA
b) Class B
c) Class A d) Class C
10. Which statement is incorrect
a)
small concentration of CO2 in the atmosphere is desirable because it regulates breathing
b)
CO2 result in complete combustion of fossil fuels
c)
CO2 is not poisonous even at very high concentrations
d)
CO2 is a colorless and odorless gas
11. A sanitary landfill with an area of 21 hectares and an average depth of 10 meters. If 850 cm 3 solid
waste is dumped daily, what would be the expected life of the landfill in years? Assume solid
waste are compacted twice their delivered density.
12. What are the standard limits for the pH of fresh water?
a. 6.00 to 9.00
b. 6.5 to 8.5
c. 6.8 to 7.2
13. Uses centrifugal force to separate particles in air
14. Green House Gas
a) CO2
b) NH3
c) CO
d) NH4
15. Pollutants
-dioxine, furans, lead
16. DAO 34
a.
Fishing- Class C Water
Requires primary treatment- Class A
BIOCHEMICAL ENGINEERING
1.
Which is present in prokaryotes: membrane, ribosome, cytoplasm?
2.
Sterilization of media can be done by any of the following except
a) centrifugation
b)cold________
c) steam injection
d) screening
3.
Which is the smallest microorganism
a) protozoa
b) virus
c) bacteria
d) fungi
4.
Anaerobic fermentation
5.
If the dilution rate exceeds the critical dilution rate , the concentration of the cell
6.
The organisms with a temperature range of 7-45°C are called
a) psychrophiles
b) hydrophiles
c) mesophiles
d) thermophiles
CHEMICAL ENGINEERING
CHEMICAL ENGINEERING CALCULATIONS
1.
2.
Mixture problem … mass balance
A membrane is used to separate an equimolal gas mixture of O2 and He. 20% of the mixture passes
through the membrane and is analyzed to contain 45% O2, 55% He. Determine the % O2, in the
remaining mixture.
a) 55
b) 51
c) 49
d) 53
3.
In a batch process, 10,000 lb of 20% solution of acetone in water are distilled. Water residue
contains 50 lb acetone, while the distillate contains 10% water. What is the total weight of the
distillate?
a) 6584
b) 1486
c) 2167
d) 3958
4.
A flow diagram, indicating the flow of materials, unit operations involved, equipment necessary, and
special information on operating temperature and pressure is a
SAMPLE BOARD EXAM QUESTIONS
5.
6.
7.
8.
5
a) schematic diagram
c) process flow chart
b) qualitative flow diagram
d) quantitative flow diagram
Pig iron is produced in a blast furnace from hematite ore containing 80% Fe 2O3. The pig iron
produced is 96% Fe. The slag contains 10% of iron present in the ore. How many tons of pig
iron are produced per 500 tons of ore?
a. 450
b. 156
c. 353
d. 272
6.
NaOH is produced by reacting 20% aqueous solution of Na2CO3 and 25% Ca(OH)2. CaCO3 is
precipitated as the solution of NaOH is produced. The precipitate is made up of 94% CaCO 3,
5% H2O and 1% NaOH. The number of grams of NaOH formed per 100 gm precipitate is
a) 28.9
b) 75.2
c) 98.7
d) 21.2
7.
A suspension of a compound X (MW = 100) flow through a pipe. In an experiment, after
collecting a sample of the suspension for 5 min. in a container, the following data were
gathered:
wt. container = 100 gm
container & slurry sample = 200 gm
vol. of slurry = 550 ml
density
= 1.09 gm/cc
The container and slurry were then oven-dried. The mass of container after drying was found
to be 250 gm. What mass fraction of the compound X is in the suspension?
8.
a. ½
b. 0.15
c. 0.30
d. 0.25
INDUSTRIAL STOICHIOMETRY AND FUEL
1.
2.
3.
For Orsat analysis, cuprous chloride reacts with ____ to form a complex.
a) CO2
b) O2
c) H2O
d) CO
Combustible product of the ultimate oxidation of sulfur
a) H2S
b) SO2
c) sulfur oxide
d) sulfur trioxide
4.
__________ is normally used to determine the quality of combustion gases
a) stoichiometry
b) Orsat analysis
c) gravimetric analysis
d) material balance
5.
A fuel gas is burned in 50% excess
a)
50% more oxygen in air reacted to completely burn
b)
only theoretical oxygen in air needed to completely burn
c)
oxygen reacted is equal to the oxygen supplied
d)
fuel gas will not burn
6.
A gas made by passing air and steam through a bed of hot coal or coke
a) LPG
b) furnace gas
c) water gas
d) producer gas
7.
Pure carbon is burned with theoretical amount of air for complete combustion in lbmoles, 80%
carbon burns, one-half of which formed CO2 and the rest CO. The percentage CO2, CO, and O2
in the combustion gases are respectively
a) 33.3, 33.3, 33.3
b) 8.1, 8.1, 8.1
c) 4.8, 8.1, 12.2
d) 81, 4.0, 12.0
8.
Given: CHONAS and H to C ratio
Required: % CO2 if all the water was removed
CHEMICAL ENGINEERING THERMODYNAMICS
1.
What is the enthalpy of equal volume of saturated liquid and vapor at 150˚C and 1m 3 volume?
2.
How much work is needed if 5lb of an ideal gas entered a
CHEMICAL REACTION ENGINEERING
1.
What is the order of the reaction if the graph C vs t gives a straight line?
2.
A
B
C___
a.
0.1
0.1
1
b.
0.3
0.1
1
c.
0.1
0.3
9
What is the order wrt to A & B?
3.
Order of reaction if rate is independent of conc.
4.
The rate of reaction is dependent on…
5.
The half-life of a material undergoing a first-order decay
varies with time
is dependent of its initial concentration
is independent of its initial concentration
is not affected by temperature
When the rate of chemical reaction increases rapidly even for small rises in temperature, there is a
rapid increase with the temperature in the
a)
heat of reaction
b)
activation energy
c)
kinetic energy of molecules
d)
fraction of molecules with energies in excess of the activation energy
A vessel contains 100 gal of concentration 1.5 lb/gal. Another solution of concentration 1 flows into
the vessel at 1.8 gal/min and the solution oveflows to 1.8 gal/min. The vessel is well-stirred so that
concentration is uniform and that the overflow is the same as that in the tank. The solution
undergoes chemical change according to the rate equation: r = 0.750 lb/gal/min. Determine how
long it will take for the amount of solute to fall to 25% its original value.
a) 0.20
b) 0.12
c) 0.71
d) 0.55
The half-life of a material undergoing second order decay is
a)
proportional to the square of initial concentration
b)
independent of the initial concentration
c)
proportional to the initial concentration
d)
inversely proportional to the initial concentration
9.
The composition of the reaction component vary from position to position along a ____/path of a/
an:
a) CFSTR
b) adiabatic reactor
c) batch reactor
d) plugflow reactor
10. Rapid increase in the rate of chemical reaction even to small temperature increases is due to
a) rapid increase on kinetic energy of molecules
b)rapid increase with temperature of the fraction molecules with energies
c) in excess of activation energy
d) rapid increase in collision frequency
11. In this reaction, the reacting substances, instead of proceeding along one path to yield a given set of
products, also follow one or more other paths to give different products
a) consecutive reaction
c) parallel reaction
b) reversible reaction
d) backmix reaction
12. A fluid flows through two stirred tank reactors in series with volume of 40,000 liters. Fluid enters at
100 li/hr. First order decay reaction and a half life of 24 hours. What is the percent conversion?
13. A fluid flow through 2 stirred tank reactor in series. Each reactor has a capacity of 40,000 liters and
the fluid enters at 100 li/hr. The fluid undergoes 1st order decay with a half-life of 24 hrs. Find the
% conversion of the fluid.
a) 85.3
b) 74.7
c) 66.8
d) 99.4
14. Given: A CSTR with 50% conversion. Its operating Cost and cost of raw materials are also given.
15. Req’d : Optimum Reactor Volume
Given: A 50% conversion for CSTR, using the same volume for plug flow reactor, what is the %
conversion?
16. What is the equilibrium constant of the reaction below at 145˚C?
C2H4 + H2O ↔ C2H5OH
17. What is the temperature difference if the activation energy is__ and k 2 is 10 times k1?
18. What is the Arrhenius constant if K2 is twice K1 and the temperature difference is __?
19. What is the activation energy if the ratio of the
HEAT TRANSFER
1.
A wall is 95°F on one side and 25°F on the other side. Which of the following will give the
highest rate of heat transfer?
a) triple area
c) reduce cold temperature
b)
double hot temperature
2.
Heat exchanger: find hc + hr
3.
4.
Find U0 ,heat exchanger given ho, hi
Best insulator a) asbestos b) Styrofoam c) corkboard
computation
d) acoustic boardConduction
SAMPLE BOARD EXAM QUESTIONS
5.
6.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Def. of conductionWhen equilibrium temperature is attained, the emissivity of a gray body is
a) zero
b) equal to reflectivity
c) equal to absorptivity
d) equal to one
Water at a rate of 0.8 kg/s is heated from 35 to 45°C in 2.5 cm diameter tube whose surface
is maintained at 90°C. The required length of tube to accomplish the heating is
a) 2.1
b) 2.7
c) 3.6
d) 1.0
In a counter flow heat exchanger, one stream enters at 200°F and leaves at 300°F which the
other stream entered at 650°F and leaves at 450°F. The log mean temperature difference in
degrees Fahrenheit is
a) 250
b) 297
c) 350
d) 273
A pipe conducting superheated steam is lagged with several layes of insulation. The rate of
radial heat flow _______
a)
decreases from inner to outer layer
b)
increase from inner to outer
c)
equal through each layer
d)
varies across each layer
For series of multi-layer conduction, the total ______ is the same as the _____ in each layer
at steady state.
a) temperature drop
b) rate of heat flow
c) resistance
d) diffusivity
The heat transferred radially across an insulated pipe per unit time per unit area.
a)
remains constant
b)
decreases from pipe wall to insulated surface
c)
inversely proportional to the thermal conductivity
d)
increases from pipe wall to the insulated surface
In steady state heat conducting system, where there is no generation of heat is involved,
which statement is always true
a)
heat flux is always constant
b)
temperature gradient is constant
c)
rate of heat transfer is constant
d)
rate of heat transfer vary along the direction of transfer
Two very large walls are at constant temperature T1 = 600°F and T2 = 900°F. Assuming the
wall behave like black bodies, what is the heat removed from the colder wall to maintain
constant temperature:
A furnace with area of 1000 ft2 and thickness of 6 inches. Coefficient of brick is 0.15 Btu/hr ft
°F. CV of the fuel is 15000 Btu/lb. What is the weight of fuel consumed per day (lbs/day) if
temperature difference is 150°F.
Flat wall is composed of an insulation of steel and asbestos. Thickness of steel and asbestos
are 0.5 feet and 0.1 feet with coefficient of 25 and 0.05 Btu/hr ft °F respectively. What would
be the overall coefficient of the wall?
In rebuilding a heat exchanger, the 12 BWG copper tubes are being replaced by aluminum
tubes. To provide equal heat transfer rate after the rebuilding of the heat exchanger, what
should be the thickness of the aluminum tubes, in inches, if the outer diameter is maintained
in 2”? Note: use properties of materials at 100°C.
a. 0.085
b. 2.062
c. 0.109
d. 0.153
A copper cylinder 2” thick and 6” inside diameter is heated internally so that the inside wall
temperature is 300°C. While the outside wall temperature is maintained at 100°C. Calculate
the heat loss per feet of cylinder in BTU/hr.
a. 44 x 103
b. 925 x 103
c. 5760
d. 529 x 103
The heat loss of an uninsulated steam pipe costs a company P 110.00 per meter length of
pipe annually. A 4 cm insulation costing P 50.00 per meter length of pipe will reduce the heat
loss by 90%. If the insulation last for 10 years, with zero salvage value, what would be the
rate of return on investment on the insulation?
a. 372
b. 25
c. 92
d. 188%
19.
Two very large walls are at constant temperature of 600°F and 900°F. Assuming that the
walls behave like black bodies, how much heat in BTU/hr ft2 must be removed from the colder
wall in order to maintain a constant temperature?
a) 8956
b) 34210 c) 3734
d) 12625
20.
Radiation heat transfer is a function of
a)
heat transfer coefficient, h
6
21.
b)
thermal conductivity, k
c)
Surface tension, 
d)
mass transfer coefficient
Conduction is a function of
a)
heat transfer coefficient, h
b)
thermal conductivity, k
c)
Surface tension, 
d)
mass transfer coefficient
FLUID FLOW
1.
Which will have the highest pressure drop?
a) gate valve
b) globe valve
c) plug valve
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
d) check valve
Rank the pressure drop - orifice, flow nozzle and venturi tube.
Which uses the same principle as on orifice
a) pitot
b) venturi
c) rotameter
d) nozzle
Measure of pipe thickness
a.
Schedule No.
Valves controlling flowrate
a) gate valve
b) glove valve
c) check valve
d)plug valve
Wetted perimeter, hydraulic radius, Deq
Equivalent diameter of equilateral triangle with sides=12 in.
Velocity of air in pitot tube given P and discharge coefficientFanning friction factor for laminar
flow
Find linear velocity given m,  and A
Which of the following is indicative of the wall thickness of the pipe?
a) log mean diameter
c) nominal diameter
b) schedule diameter
d) log mean area
Which of the following pipes has the highest relative roughness?
a) 4-in diameter wrought iron
c) 1-in diameter tubing
b) 4-in diameter riveted steel pipe
d) 2-in diameter wrought iron pipe
________ is the relative viscosity of the fluid to that of water at 20°C.
a) absolute viscosity
c) relative viscosity
b) kinematic viscosity
d) Newtonian viscosity
A head of 3 feet of water is equivalent to __ ft. of brine with a specific gravity of 1.5.
a) 0.5
b) 2
c) 4.5
d) 1.5
The pressure drop in a rotameter is
a) variable
b) not measurable
c) zero
d) constant
When a solid object is placed across the path of fluid in motion. The pressure drop across the
solid object is ____ proportional to _____
a) surface area of the solid object
c) density of the fluid
b) velocity of the fluid
d) volume of the solid object
The advantage of the orifice meter over venturi meter is
a) lower coefficient of discharge
c) lower pressure drop
b) easier to install
d) more accurate
A device used to move incompressible fluids is
a) blower
b) compressor
c) pump
d) fan
The orifice coefficient Co is always determined experimental. If the Reynold’s number at orifice is
above 20,000 and the ratio of orifice diameter to diameter of conduit is less than about _______,
the value of Co is approximately 0.61.
a) ½
b) ¾
c) 1
d) ¼
The pressure drop of the fluid flowing through a conduit is
a) zero, as the velocity is constant
b) not affected by flow regime
c)
not affected by conduit material
d)
much higher during turbulent flow
Engine oil with kinematic viscosity of 0.00024 m2/sec is flowing inside an annulus at 0.5 m/sec.
Annulus is made up of 3 in. Sch. 40 and 1 in. Sch 40 concentric pipes 10 m long. Pressure drop
expressed in meters of oil is:
a) 2.33
b) 4.57
c) 1.98
d) 0.65
SAMPLE BOARD EXAM QUESTIONS
21.
Oil with a viscosity of 300 cp and density of 60 lb/ft3 flow through a ½” inside diameter.
Determine the velocity, in ft/s below which flow will be laminar.
a. 87.2
b. 0.63
c. 13.1
d. 16.9
23.
H2O at 60°F is flowing through a 3” inside diameter smooth horizontal pipe. If the Reynold’s
number is 35300, calculate the ratio of maximum velocity to average velocity
a. 1.89
b. 1.05
c. 1.22
d. 1.72
24.
The pressure after the pump in a 6” inside diameter smooth pipe conducting H 2O is 20 is
discharged at an open tank 100 ft from the pump. Calculate the rate of discharge of H 2O in
ft3/s. Assume the H2O at 60°F.
Flow in nozzle. D1=3 in. and D2=1 in. Find P.
Find velocity at 3 in. pipe at the bottom of a tank 10 m in height.
Which of the following requires cooling? A) fan b) blower c) compressor d) piston pump
Arrange pressure drop: fan, blower, compressor
Valve which prevents reversal of flow
Which is a Newtonian fluid? A) water b) quicksand c)clay d) glycerine
Ratio of viscosity to density
Given strength of pipe is 10,000 psi and working pressure is 400 psi, find the schedule
number.
A venturi meter with a 0.75 in. throat diameter is inserted in a 3 in. line carrying water at
70°F. The head measured over the venturi (upstream to throat) is 20 in. Hg. Assuming 12%
of the total pressure drop as permanent loss, what is the power loss to the venturi?
Reynolds Number
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
DIFFUSION
1.
The NH3 in an air-NH3 gas mixture is absorbed in liquid water. The concentration of NH3 3 mm
from the gas liquid interface is 5 mole %. At the interface the system is at 1 atm and 30°C.
Calculate the rate of diffusion of NH3 in mol/hr-cm2.
a) 0.023
b) 1.33
c) 0.0058
d) 0.17
2.
For a gas diffusing in a stagnant layer of another gas, the concentration decreases _____ along
the diffusion path.
a. linearly b. geometrically c. proportionally d. logarithmically
GAS ABSORPTION
1.
Given: vapor pressures and total pressures, following Raoult’s law
Required: Mol fraction of components
2.
3.
4.
5.
6.
Gas absorption: given % composition in gas phase, Kg, Kl, and equilibrium relation. Find rate of
mass transfer
In a gas absorption tower where the transfer operation is liquid phase controlled the transfer
resistance in the vapor is similar to the resistance in the liquid phase
a. transfer resistance in the vapor is negligible
b. transfer resistance in the liquid phase is negligible
c. transfer resistance in the vapor phase is maximum
Given partial pressure in air, Henry’s constant and diffusivity. Find rate of absorption
How much volume of dry air is required to fully vaporize 6 moles of ethanol? Total pressure is
100 kPa and the partial pressure of ethanol is 5.93 kPa.
Determine the pressure drop when an ideal gas of velocity __ passed through 3 layers of
packing material, 1.5 mm in diameter given that the porosity is__.
DISTILLATION
1.
Distillation- use equilibrium data in Perry’s for pentane-hexane mixture.
2.
When is  method invalid? (Distillation)
3.
When you connect the two delta pts, it makes a straight line with? Explain method.
4.
30°C, propane and butane, equimolar composition…what is the comp. of vapor
condensedComponent A in an ideal binary solution is 20% mole of the liquid phase. If the
vapor pressure of A is equal to ½ of the total pressure of the vapor mixture, determine the
mole fraction of A in the vapor phase.
7
a) 0.2
5.
6.
3.
4.
5.
6.
7.
8.
9.
14.
b) 0.5
c) 0.1
d) 0.4
The vapor and the liquid in the separator for flash distillation are always
a) replenished mixture
c) below the boiling point of the initial mixture
b) in equilibrium
d) of equal composition
The _______ efficiency is the efficiency for a single plate of a distillation column.
a) specific b) point
c) Murphee d) local
A mixture containing 60% mol n-pentane and 40% mol n-heptane is subjected to a single stage
batch distillation until 50 moles are distilled. If the average relative volatility is 7.6, the composition
of the distillate collected in mole fraction with n-pentane is
a) 0.75
b) 0.91
c) 0.68
d) 0.87
If pressure on the fluid suction line drops, some liquid flashes into vapor. This flashing is called
______
a) diffusion
b) vaporization
c) boiling
d) cavitation
In __________ distillation, the vapor generated by boiling the liquid is withdrawn from contact with
the liquid and condensed as fast as it is formed.
a) multi-step
b) fractional
c) differential
d) flash
In a batch process, 10,000 lb of 20% solution of acetone in water are distilled. Water residue
contains 50 lb acetone, while the distillate contains 10% water. What is the total weight of the
distillate?
a) 6584
b) 1486
c) 2167
d) 3958
A binary azeotorope contains x% wt. A (MW = 100) and Y% wt. B (MW = 200). Express the mole
fracion of A in terms of X.
a) (X + 150)/2
c) X/150
b) 200 X/X + 100
d) 2X/X + 1
One component of an ideal binary solution has a vapor pressure equal to one-half the total pressure
of the vapor mixture, the component constitutes 20 mole% of liquid phase. What is the mole
fraction in the vapor phase?
a) 0.25
b) 0.20
c) 0.50
d) 0.10
In fractionation, an increase in reflux ratio
a) decrease in reboiler duty
b) increase in the number of theoretical plates
c) increase in the amount of distillate
d) increase in the condenser duty
Given amount of feed and bottoms and reflux ratio. Find flowrate at the top.
HUMIDIFICATION
1.
Given dry-bulb temperature, humidity and enthalpy in SI units. Find %RH.
2.
Cooling approach of 10°C, wet-bulb temperature of 70°F,hot water temperature of 110°C, what is
the cold water temperature?
3.
Why is it that it is hotter in a cloudy night than in a clear night?
4.
Using Perry’s - Area of a cooling tower
Given: Approach, wet-bulb temp, hot water temp, flow rate
Required: area of cooling tower
5.
Find relative humidity and dew point given dry bulb and wet bulb temp
6.
A unit operation where solid may not be separated from liquid
a) sédimentation
b)filtration c) humidification
d) centrifugation
7.
Inefficiency for large packed tower is due to
a) channeling
b) poor packing
8.
9.
10.
11.
Def. of dewpoint
Def. of saturation
Given partial pressure, total pressure, vapor pressure and dry bulb T find %RH
The dew point of air indicates the
a)
atmospheric pressure when precipitation occurs
b)
initial temperature of air
c)
difference between the saturation temperature and the ambient temperature
a)
temperature at which the water content will start to condense
SAMPLE BOARD EXAM QUESTIONS
12.
13.
10.
DRYING
1.
2.
3.
4.
Humid aid at temperature 600°F and a total pressure of 1 atmosphere is passed through a
dehumidifier at a rate of 1000 ft3/min. The partial pressure of water vapor in air is reduced
from 45 mmHg to 10mmHg. How many lbs of water is removed per hour?
a) 81.9
b) 65.4
c) 45.4
d) 76.3
Poor performance in large packed towers is due mainly to
a) poor packing
c) cavitation
b) inefficient heat transfer
d) channeling
The ratio of the partial pressure of water vapor to the vapor pressure of water is:
a) equilibrium moisture
c) relative humidity
b) absolute humidity
d) critical moisture
In adiabatic drying operation, the ______
a)
dry bulb temperature of the air is increasing
b)
humidity of the air is constant
c)
wet bulb temperature of the air is constant
d)
dew point of the air decreases
Def. of critical moisture content
Material balance
Radiation
a. Transmisivity
b.
Emmisivity
EVAPORATION
1.
BPR of 20% HNO3 at 220°F?
2.
BPR - NaOH Monographs The evaporation of boiling liquid may be indicated by
increase of the surface pressure
adding salt
decrease of the area exposed to the atmosphere
decrease of the surface pressure
3.
The total capacity of 4-effect evaporator is ________ that of a single effect evaporator of the
same heating surface equal to that of one of the effects when operated under the same
terminal conditions.
a) twice
b) equal to c) 4 times
d) ¼
CRYSTALLIZATION
1.
Crystallization problem-about enthalpies
2.
NaCl exhibits immerse solubility, precipitation can be done by
a) cooling with little vacuum
b) simple cooling
c) evaporation
3.
A solution containing 30% wt Na2CO3 in water is slowly cooled to 20°C. During cooling, 10% of
the H2O is evaporated and crystals of Na2CO3•10H2O are precipitated. If the solubility of an
anhydrous Na2CO3 at 20°C is 21.5 g/100 g of H2O, how many grams of Na2CO3•10H2O
crystallized out per kilogram of original solution?
a) 232
b) 124
c) 698
d) 596
4.
Given solubility at T1 and T2, find amount of crystals formed at T2.
LEACHING/ EXTRACTION
1.
A slurry of slaked soybeans weighing 100 kg contains 75 kg inert solids and 25 kg solution with
10% wt. oil and 90% wt. solvent hexane. This slurry is contacted with 100 kg pure hexane in a
single stage leaching equipment so that the value of retention for the outlet underflow is 1.5 kg
of insoluble solid per kg solvent in the adhering solution. What is the composition of the
underflow leaving that extraction stage in percent by weight oil?
a) 1.5
b) 2.3
c) 0.3
d) 0.8
2.
Countercurrent extraction - def. of terms
SCREENING
1.
Std. Size of screen which will give the smallest product
8
SIZE REDUCTION
1.
Use Rittinger’s formula: xF =21, x1=4.2 and xP=5.
FILTRATION
1.
Filtration - trend in pressure drop and rate
2.
Which will give highest efficiency for filtration?
b)
constant rate
c)
constant pressure
d)
constant rate follow constant pressure
e)
constant pressure follow constant rate
MEMBRANE SEPARATION
1.
What solid-solid separation uses a membrane as a molecular sieve?
SEDIMENTATION
1.
Drag force = given particle diameter, velocity, 
MATERIALS HANDLING
1.
What is used in transporting fine, non-abrasive materials in horizontal and vertical motion
a) pneumatic
b) belt
c) bucket
d) screw
2.
What is the solid-conveying device that is made of rubber and cloth?
3.
Storage for cartons and boxes
DIMENSIONLESS NUMBERS
1.
2.
3.
4.
a)
Which is not dimensionless?
a) Atomic No.
c) Reynolds No.
b) Prandtl No.
d) Lewis No.
Which of the following dimensionless numbers relates heat and mass transfer?
a) Sherwood No.
c) Nusselt
b) Schmidt
d) Lewis No.
Given acetic acid, velocity, 60°C; find viscosity, density, Reynolds no
Prandtl No. is
velocity/area
b) momentum/time
c) dimensionless
d) force/area
CHEMICAL PROCESS INDUSTRIES
1.
What is one process wherein SO2 is contacted with O2 to form H2SO4 in a lead chamber?
a) hydration process
b) sulfonation
c) contact process
d) chamber process
2.
Removal of O2 from steel
3.
Which of the following does not belong?
a) MgO
b) brimestone
c) CaCO3
d) Lime
4.
Process that extracts gold and silver from a metal ore
a) extraction
b) cupelation
c) decripitation
d) coprecipitation
5.
Which process is used in making gasoline?
a.catalytic cracking
b. Kraft process
6.
What is used to replace CFC
7.
Mineralization is a) oxidation b) reaction with metal
8.
Synthetic wintergreen oil contains
a) vinyl acetate
b) methyl salicylate
c) benzyl acetate
d) ethyl salicylate
9.
To increase the life of an incandescent lamp it is
a) filled with neon gas
c) filled with CO2 gas
b) filled with argon gas
d) evacuated
10. Lanolin is widely used in cosmetics, is derived from _______
a) cottonseed oil
b) coconut oil
c) sheep’s wool
d) palm oil
11. Chemical Process Industries
a) Sulfuric Acid
b) food industries
12. Definition of Putrefaction
13. Definition of Eutrophication
SAMPLE BOARD EXAM QUESTIONS
14.
15.
9
What is the product of nitration of a cyclic hydrocarbon?
How much sulfuric acid is oleum acid?
MATERIALS OF CONSTRUCTION
1.
About intrinsic semiconductor… resistivity as temp increases
2.
Best electrical conductor
3.
Pig iron is essentially the same as:
a) low carbon steel
b) wrought iron
c) Bessemer steel
1.
d) cast iron
PROCESS EQUIPMENT AND PLANT DESIGN
1.
Most economical pressure vessel
2.
Design based on conditions giving the least cost per unit time or maximum profit per unit of
production
a) limit
b) break even
c) optimum economic design
d) plant design
3.
Compute the gauge number of a brass pipe if S=__.
4.
What do you call the shaft whose axes do not cross each other?
5.
Kinds of bearings, definition.
6.
Kinds of gears, definition.
INSTRUMENTATION AND PROCESS CONTROL
1.
The capacitance of a material packed between two electrical plates
a) decreases with the surface area of the plate
b) increases with the surface area of the plate
c) is fixed regardless of the plate size or distance
d) increases as the distance between the plates is increased
2.
Which is not a characteristics of a PI control
a)
long period of oscillation
b)
long response time
c)
higher maximum deviation
d)
smaller offset than with proportional only
3.
Centrifuge
-thickness of the basket given rpm, allowable stress, thickness of cake
4.
Cyclone (efficiency)
5.
What is the efficiency of the cyclone with a feed of :
30% - 20mm particles
40% - 30mm Particles
30 % - 20mm Particles
6.
Definition of automation
7.
Definition of feed-forward control system
8.
Definition of Open loop control system
LAWS, CONTRACTS AND ETHICS
1.
Law which gives incentives to exporters
2.
CPE requirement per year
3.
Focus of Chemical Engineering… to obtain the highest efficiency of process with the least cost
4.
An act for regulation, protections of trademarks, trade names and service works.
a) RA 1752
b) RA 166 c) RA 318 d) RA 6969
5.
__________ is the condition where a 3rd person becomes a new debtor without the knowledge
of against the will of the debtor but always with the consent of the creditor.
a. Subrogation
b. Delegation
c. Rescission
d. Expromission
6.
Act which prohibits the use of leaded gasoline
a. Clean Air Act
GENERAL ENGINEERING
ALGEBRA AND TRIGONOMETRY
2.
3.
4.
5.
6.
7.
8.
9.
10.
Given woman with tumor of 3” in diameter growing at a rate of 10% a month, operation can be
possible when the diameter is 3.5”. How long should she wait?
About polynomial factoring
Inflection point
Differential Calculus
Newtons Law of Cooling
Roots of equation
Realated Rates
Complex Numbers
If n=2, a= –Xn and b= (–X)n find the relationship bet. a and b
a) 30%
b) 1/3
If a man paints 2/3 of a room and another man painted ¾ of what remains, what fraction remains
to be painted?
a) none of these
b) 1/6
c) 1/12
d) 1/3
11.
A housewife adds 5 cups of water for every 4 cups of uncooked rice. How many cups of water are
added to make 10 cups of cooked rice assuming each cup of uncooked rice results to two cups of
cooked rice?
a) none of these
b) 6
c) 8
d) 6-1/4
12.
¼ of the employees of a company earn under P 12,000.00/mo. If 3/5 of the remaining
employees earn between P 12,000.00/mo. and P 18,000.00/mo, what fraction of the employees
earn more than P 18,000.00/mo.?
a) none of these
b) 3/10
c) ¾
d) 9/20
13.
75 men can finish work in 100 days. 80 men worked for 40 days. After that 30 men has to
transfer. In how many days will the remaining fraction of work be finished?
100 Li tank with 50 gallons of salt, the comcentration however should be30 gallons/100Li. Fresh
water was allowed to flow at the rate of 3 Li/ min, assuming that the tank is perfectly mixed and
salt solution was allowed to flow at the rate of 3 Li/ min, in how many min will the concentration
be 30 gallons/ 100 Li?
age problem
work problem
14.
15.
16.
ANALYTICAL GEOMETRY
1.
radius of sphere = radius of cylinder; given the vol of sphere, Area of cylinder =?
2.
What is the length of the base of a triangle whose area is 1/3 and height 4/5?
a) none of these
b) 5/6
c) 1/3
d) 2/5
3.
4.
What is the radius of the circular base of a cylinder whose volume is 45 and height is 5? A)
none of these
b) 3
c) 6
d) 7
A tank with diameter 2m and length 6 m is placed above a platform parallel to the ground. It is
filled with water to the height of 1.5 m. Find volume of water.
STATISTICS
1.
Given rate of people entering ATM is 3 persons/min. What is the probability of at least 2 persons
coming? Three persons?
2.
What is the probability distribution wherein 2 dice are repeatedly thrown and the no. of times
wherein at matching pair is recorded “_______________”.
3.
Probability of getting two heads? ¼
4.
How many permutations are there in SOMOS
5.
Probability (K,K) with replacement, 52 cards
6.
Probability to get sum of 6 for two consecutive throws of dice
7.
Poisson distribution applications
8.
Binomial distribution applications
9.
The probability of getting heads or tails with an unbiased coin is ½. If the coin is tossed three times,
what is the probability of a tail on the third throw?
a) 1/8
b) 1
c) ½.
d) 1/6
SAMPLE BOARD EXAM QUESTIONS
9.
10
In an unbiased coin toss, the probability of getting heads or tails is exactly ½. What is the
probability of consecutively getting heads in 2 tosses assuming an unbiased coin?
a) 1/8
b) ¼
c) none of these
d) 1/3
10.
A bag contains 5 red, 3 green, and 2 white balls. What is the probability of not getting a
white ball in the 1st draw?
a) 0.2
b) 0.16
c) 0.8
d) 0.15
11.
The probability of getting head or tail in tossing a coin is ½. If a coin is tossed 6 times, what
is the probability of getting exactly 3 heads?
a) none of these
b) 1/64
c) 5/16
d) 1/8
12.
A bag contains 3 white, 7 black, 2 red and 9 green balls. If one ball is drawn from the bag,
what is the probability that it will be either be white or green?
a) none of these
b) 4/7
c) 3/8
d) 1/7
13.
The probability distribution that good components in a lot during sample will be given,thus
no. of good components
0
1
2
3
in a sample
Probability
1/35
10/35
20/35
4/35
If a sample of 3 is selected at random at infinite number of item, what would be the average
number of good components in the sample?
a) none of these
b) 1.5
c) 1.77
d) 2.0
14.
15.
16.
17.
In how many ways can you select 7 out of ten questions?
Roll 2 dice; find probability of getting sum of 8.
Three couples are to be seated in a circular table each couple side by side. In how many ways
can they be seated?
ECONOMICS
1.
About depreciation (Economics)
2.
Which does not belong to the working capital cost
3.
Given initial investment, MARR, profit/item
4.
Required: Quantity for break-even
5.
Fixed Expense
6.
Capitalized cost
7.
Straight line depreciationFixed cost …computation
8.
Deposit computation
9.
Annuity computation
10.
What is the effective interest rate of 3% compounded monthly?
11.
Definition of terms
12.
Depreciation Problem
13.
BOI-registered project has the following financial data:
landed cost of equipment
= P 50,000,000.00
installation cost
= 20% of equipment
work capital
= 10% of installation cost
equipment depreciation
= 10 years straight line-method
cost of money
= 20%
expected sales revenue
= P 30,000,000.00
direct cost
=
15,000,000.00
indirect/overhead cost
=
5,000,000.00
BOI incentive
= no income tax
What is the rate of investment?
a. NOT
b. 20%
c. 15%
d. 16.7%
What is the net present value of the project?
a. about 20M
b. NOT
c. 30M
d. 18
What is the payback period?
a. 3.3
b. 5
c. 3.1 yrs
14.
Acid test ratio
15.
Future, present and Annual worth
16.
STRENGTH OF MATERIALS
1.
2 sails l2” apart, given , E and T. What is the stress?
2.
Torsion
3.
Torque
4.
Tension/ Tensile Stress
5.
A balloon was filled with Helium of 3,000 L capacity. What should be thetension in the string to
hold the balloon down?
6.
A sail boat weighing 2000lbs. What torque was applied when the sailboat tilted at 20 o. Assuming
seawater.
7.
elasticity coefficient
8.
yield coefficient
PHYSICS
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
A woman is traveling at 60 kph. One hour after the woman left pt A, the man followed at the rate
of 80 kph. How far from one origin did they meet.
An astronaut weighing ____ kg moving at a rate of _____ collides with a meteor of ____ kg.
Assuming perfectly elastic collision, at what rate would the total mass travel?
Projectile motion
V = IR
Power
Refraction… index of refraction
Given g at Neptune and mass of object, what is the weight of the object?
Hooke’s law
Acceleration
Momentum-impulse…elastic
Friction
angular acceleration… computation
Speedometer
Two cars leave the same location at 9:00 AM. If one car travels south at the rate of 60 kph and
the other travels west at the rate of 80 kph, how many kilometers are the two cars apart at 10:00
AM the same day?
a) 120 km
b) 100 km c) 140 km d) 50 km
Sound waves do not travel in:
a) compressed air b) vacuum
c) soft solids
d) hot water
16.
Electric field intensity due to a point charge varies inversely as the square of the distance from the
charge. If the field intensity at a given point is E, what is the field intensity at a point 3 units
away?
a) 1/3 E
b) 3E
c) 1/9 E
d) none of these
17.
The sound produces beats when they have:
a) slight difference in amplitude c) slight difference in frequency
b) same frequency
d) same amplitude
Soldiers marching over a bridge must “break step” in order to avoid this phenomenon
Ans. Resonance
18.
19.
20.
21.
d. NOT
Simplex method and simplex algorithm
What upward acceleration of the elevator will cause the string to break? Gravitational acceleration
= 9.8 m/s2
a. none of these (not)
b. 10.2 m/s2
c. 19 m/s2
d. 20 m/s2
A man can walk up a stalled escalator in 90 sec. but he can walk up a running escalator in 30 sec.
If he were to stand on a moving escalator it would take him
a. 2
b. 60
c. 45 sec
d. NOT
A box slides down at constant speed of 5 m/s relative to a ramp inclined at 60° at the horizontal
which is mounted on the back of a truck. A man sees the box as if it was moving down vertically
as the truck passed by. What is the speed of the truck relative to the man?
a. 5
b. 4.33
c. NOT
d. 2.5 m/s
SAMPLE BOARD EXAM QUESTIONS
11
22.
A 100-lb boy is riding a skate board with a weight-measuring scale down a 45° inclined.
What weight will the scale read as the boy is coming down the inclined?
23.
24.
In -emission, energy produced is less than the actual energy that should be produced. Why?
A generator with speed 120 rpm has =65V. If the speed is reduced to half the initial value,
what is the new ?
A and B are running in a circular path. They started at the same point the same time.
Velocity of A is 110 m/min and that of B is 88m/min. B overtakes A in 3 minutes. Find the
length of the path.
What is the KE given mass and velocity?
A bucket weighs 5 kg when empty and 20 kg when full. It is raised from a well at 2m/s. Find
the magnitude of the force at the rope.
Given mass H2. Remove all electrons and place 1 m away from the protons. Calculate the
electrostatic force.
When is a body said to be in equilibrium?
Pressure in an orifice is independent of what?
Optics
-angle of incidence
-critical angle of light from glass to air
What kind of image is produced by a convex mirror
a. inverted
b. real
c. smaller
d. erect
a. NOT
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
b. 50
2 lb
c. 0
d. 100
Momentum problem
transformers
statement analyses, relationship of frequency and intensity
electrolysis problem
Additional Board Questions( May 2003)
Physical and Chemical Principles
CHEMICAL & PHYSICAL PRINCIPLES
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
Product of oxidation of methanol
Use of gravimetric factor
Combustion stoichiometry
Formula mass given number of C,H atoms and mass of other components in a molecule
Oxygen needed to produce P4O10
Empirical formula of C6H12O6
Ostwald Process
Most abundant gas in the Universe
%H2 in the earth’s crust
Titration
Gibbs Free Energy of reaction other than 25oC
Enzyme in cheese making
Esterification
Balancing nuclear reaction
Food additives
Reactions producing alkenes
Reaction involving Grignard reagents
MW of a compound
pH of a solution of strong acids
Conjugate acid-base pair to buffer at pH = 2
Minimum [S2-] to maintain, given 2 Ksp and concentrations of cations in a solution
pH of NaCl solution
2
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
Laws involving gasses (Boyles, Charles, and others)
Stereospecific
Source of Nitrogen in fertilizers
Trouton’s rule
Air pollution equipment
% Argon in the earths crust
Definition of plankton
Ether definition
Valence electron of C
Balancing chemical reaction
Solubility problems
BOD calculation
Which are most likely ionic?
a.
LiNO3
b.
SiCl2
c.
C2H4
d.
NaCl
If superheated steam was cooled at constant ____ , the _____ at which the condense vapour
appeared is the ____ .
Textile bleach also used as food preservative.
% Xenon in the atnosphere
Food additive (taurine, lye, sorbitol, furfural)
The product of ethyl chloride and alcohol
How many electrons in the d subshell fo Al?
Strongest organic acid
Heat involved in 60 g of Pb from 30oC to 360oC, given the melting point and heat of fusion
Ra 6969
Device use in air pollution
Predominant source of CO
Gas-air pollution: NO2, NOx, CO, CO2
Pyrometer measures
lightest particle
Electrolytes
problem which uses Q=mCpdT
choices: azeotropic, eutectic, critical point, triple point
Which is present in prokaryotes: membrane, ribosome, cytoplasm
Octane number refers to the amount of this substance.
a.
Isooctane
b.
2,4,4-trimethylpentane
c.
heptane
d.
2,3-dimethylhexane
Strong waste has a BOD of:
a. 1000
b. 2000
c. 3000
d. 4000
about digestion
strong water in DAO 34 or 35: choices: 1000, 2000, 3000 ppm
CHEMICAL ENGINEERING
1.
2.
3.
4.
5.
6.
7.
8.
What is the enthalpy of equal volume of saturated liquid and vapor at 150˚C and 1m3 volume?
How much work is needed if 5lb of an ideal gas entered a
What is the equilibrium constant of the reaction below at 145˚C?
C2H4 + H2O ↔ C2H5OH
Similar problem in kinetics
What is the temperature difference if the activation energy is__ and k2 is 10 times k1?
What is the Arrhenius constant if K2 is twice K1 and the temperature difference is __?
What is the activation energy if the ratio of the
Determine the pressure drop when an ideal gas of velocity __ passed through 3 layers of
packing material, 1.5 mm in diameter given that the porosity is__.
SAMPLE BOARD EXAM QUESTIONS
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
Filtration
Compute the gauge number of a brass pipe if S=__.
What do you call the shaft whose axes do not cross each other?
Kinds of bearings, definition.
Kinds of gears, definition.
Definition of Putrefaction
Definition of Eutrophication
What is the product of nitration of a cyclic hydrocarbon?
How much sulfuric acid is oleum acid?
Definition of automation
Definition of feed-forward control system
Definition of Open loop control system
Subsonic flow
Material for vessel to contain water at 220oF and 6 atm: (ASME 68, ASME 69, Riveted
steel)
Butt welding
Gears
Forklifts, trolleys, conveyors
fluid flow
Drying material balance
Volume of a plug flow reactor
Polymers
Sch No. given operating Pressure and maximum allowable stress
Stefan-Boltzmann equation
Dimensionless number in heat flow
Thernodynamic equilibrium problems
Pressure drop calculations in pipe
Cost index
Convection problem – rate of heat transfer
Automation equipment
Equipment to separate particle diameters < 1 micron
Equipment for primary waste water treatment
Newtonian fluids
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
GENERAL ENGINEERING
age problem
work problem
Momentum problem
transformers
statement analyses, relationship of frequency and intensity
electrolysis problem
projectiles
elasticity coefficient
yield coefficient
strength of materials
definition of terms
depreciation problem
Stress vs strain plot
6/10 factor rule
parabolic arc, find the beam length 2.5 m above the base of a parabola ( h = 3m )
Ecology definition
ppm in mg/L
Annuities given future worth
Interest factors
Mixing problem
Probabilities
Probability in 50 trials given the number of 2 colored balls
12
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
Free fall with air resistance
Kinematics problem
Convert rad to J/Kg (dose of radiation)
Digits problem
Age problem
Simplification of polynomial ratios
Area of trapezoid given the length of 2 diagonals, 2 bases
length of the shortest side given the ratio of the angles of a triangle
Area of the triangle given 3 vertices
Area of a segment of a sphere
There are 40 black balls and 40 white balls. If balls are drawn twice, how many times will a
black and a white ball be drawn consecutively out of 50 trials?
If 2 men can work on 6 hectares for 4 hours, how many men are needed to work on 18
hectares if they have to finish the work in 8 hours?
Ultimate strength
Proportional limit