Quiznetik

Engineering Chemistry | Set 3

1. On what factors does the specific gravity of coal depends?

A. its calorific value and ash content

B. its ignition temperature and calorific value

C. type of coal and ash content

D. type of coal and calorific value

Correct : C. type of coal and ash content

2. Which of the coal have the best heating values in terms of volatile matter?

A. containing 20% volatile matter

B. containing 60% volatile matter

C. containing 30% volatile matter

D. containing 50% volatile matter

Correct : A. containing 20% volatile matter

3. Which type of coals have the highest grindability index?

A. steam coals

B. gas coals

C. house coals

D. pulverised coals

Correct : D. pulverised coals

4. How does the friability of the coal is tested?

A. drop shatter test

B. thermal cracking

C. knocking

D. proximate analysis

Correct : A. drop shatter test

5. Which property of coal is tested in Audibert Arnu test?

A. bulk density

B. colour

C. caking and coking

D. texture

Correct : C. caking and coking

6. On which property of coal does the design of bunkers for the storage of coal depends?

A. specific gravity

B. bulk density

C. grindability

D. friability

Correct : B. bulk density

7. Phosphorous and sulphur content in the coal tend to make a metal brittle.

A. true

B. false

Correct : A. true

8. Which of the following is not a characteristic of coal?

A. weathering

B. slaking index

C. moisture content

D. bulk density

Correct : C. moisture content

9. In determination of carbon and hydrogen by ultimate analysis, increase in weight of calcium chloride bulb represents

A. weight of water formed

B. weight of carbon dioxide formed

C. carbon

D. hydrogen

Correct : A. weight of water formed

10. Hydrogen available for combustion is lesser than the actual one.

A. true

B. false

Correct : A. true

11. Good quality of coal should have % of oxygen.

A. low

B. high

C. 100

D. 0

Correct : A. low

12. Percentage of ash by analysis of coal is given by

A. (weight of residue/weight of sample) × 100

B. (weight of sample – weight of residue) × 100

C. (weight of sample – weight of residue)/weight of sample × 100

D. (weight of residue – weight of sample) × 100

Correct : A. (weight of residue/weight of sample) × 100

13. In coal, Sulphur is usually present in the extent of

A. 0.5-3%

B. 90-95%

C. 70-75%

D. 80-85%

Correct : A. 0.5-3%

14. In ultimate analysis, %hydrogen is given by

A. (increase in weight of cacl2 tube×2×100 / weight of coal sample taken×18)

B. (increase in weight of koh tube×2×100 / weight of coal sample taken×18)

C. (increase in weight of cacl2 tube×4×100 / weight of coal sample taken×18)

D. (increase in weight of koh tube×4×100 / weight of coal sample taken×18)

Correct : A. (increase in weight of cacl2 tube×2×100 / weight of coal sample taken×18)

15. is the weight of residue obtained after burning a weighed amount of dry coal.

A. ash

B. volatile matter

C. moisture

D. carbon

Correct : A. ash

16. In proximate analysis of coal, %fixed carbon =

A. 100 – % (ash + volatile matter + moisture)

B. 100 – % (ash + moisture)

C. 100 – % (ash + moisture) + %volatile matter

D. 100 – % (moisture + volatile matter)

Correct : A. 100 – % (ash + volatile matter + moisture)

17. What is the primary component of crude oil?

A. sulfur

B. carbon

C. hydrogen

D. nitrogen

Correct : B. carbon

18. How is crude oil separated?

A. crystallization

B. fractional distillation

C. decantation

D. sublimation

Correct : B. fractional distillation

19. What type of gas is LPG?

A. gasoline

B. kerosene

C. uncondensed

D. heavy oil

Correct : C. uncondensed

20. Which fuel/oil is used for obtaining gasoline?

A. kerosene

B. diesel

C. heavy

D. naphtha

Correct : C. heavy

21. Which of the following is not used as a lubricant?

A. lubricating oil

B. grease

C. asphalt

D. petroleum jelly

Correct : C. asphalt

22. What is the function of petroleum coke?

A. lubrication

B. in candles

C. as fuel

D. as solvent

Correct : C. as fuel

23. Carbon black and hydrogen can be manufactured using

A. natural gas

B. coal gas

C. oil gas

D. water gas

Correct : A. natural gas

24. Coal gas is attained from to a process carried out at

A. 300oc

B. 700oc

C. 900oc

D. 1300oc

Correct : D. 1300oc

25. Oil gas is obtaining by the cracking of

A. kerosene oil

B. diesel oil

C. heavy oil

D. gasoline

Correct : A. kerosene oil

26. Which of these gases is used for heating open-hearth furnaces?

A. oil gas

B. producer gas

C. biogas

D. water gas

Correct : B. producer gas

27. How is biogas prepared?

A. decantation

B. filtration

C. fermentation

D. sublimation

Correct : C. fermentation

28. Which type of coal is used in Bergius process?

A. anthracite coal

B. steam coal

C. pulverised coal

D. gas coal

Correct : D. gas coal

29. Which substance is mixed with the pulverised coal in the Bergius process?

A. sulphuric acid

B. heavy oil and catalyst

C. heavy oil

D. catalyst

Correct : B. heavy oil and catalyst

30. At what temperature does the Bergius process is carried out?

A. 200-300 0c

B. 700-800 0c

C. 350-500 0c

D. 0-150 0c

Correct : C. 350-500 0c

31. Which product is obtained from the converter in the Bergius process?

A. hydrocarbons

B. olefins

C. fuel oil

D. gasoline

Correct : A. hydrocarbons

32. Same catalyst is used for production of oil in the Bergius process as used in the production of hydrocarbons.

A. true

B. false

Correct : B. false

33. Which compounds are rich in gasoline obtained from the Bergius process?

A. tetraethyl lead

B. ethanol

C. olefins

D. aromatic compounds

Correct : D. aromatic compounds

34. What happens to the middle oil fraction in the Bergius process?

A. the oil is converted into olefins

B. the oil is converter into paraffin

C. the oil is converted into gasoline

D. the oil is converted into hydrocarbons

Correct : C. the oil is converted into gasoline

35. Which undesirable compound is present in gasoline?

A. sulphur compounds

B. phosphorous compounds

C. chloride compounds

D. magnesium compounds

Correct : A. sulphur compounds

36. How much percentile of sulphuric acid is treated with gasoline for the removal of its impurities?

A. 99 %

B. 60 %

C. 80 %

D. 40 %

Correct : C. 80 %

37. Removal of gaseous impurities like methane, ethane, propane and butane from gasoline is called as

A. stabilization of gasoline

B. sweetening of gasoline

C. doping of gasoline

D. blending of gasoline

Correct : A. stabilization of gasoline

38. Which of the following compound readily goes under the process of knocking?

A. 2-ethly butane

B. n-heptane

C. benzene

D. toluene

Correct : B. n-heptane

39. Which of the following compound is considered for calculating the cetane number?

A. α-methyl naphthalene

B. n-hexane

C. iso-octane

D. cetane molecule

Correct : D. cetane molecule

40. What should be the cetane number of middle speed diesel engine?

A. at least 35

B. at least 25

C. at least 65

D. at least 45

Correct : A. at least 35

41. The knocking characteristic of gasoline fuel are expressed in terms of cetane number.

A. true

B. false

Correct : B. false

42. Which of the following substance is used to decrease knocking in diesel fuel?

A. tetra ethyl lead

B. benzene

C. sodium hydroxide

D. acetone peroxide

Correct : D. acetone peroxide

43. Which of the following is used to reduce the surface tension in diesel fuel?

A. chemical additives

B. inhibitors

C. poly hydrocarbon

D. dopes

Correct : A. chemical additives

44. By which process does the knocking starts in diesel engine?

A. due to sudden spontaneous combustion of last portion of fuel

B. due to delay in spontaneous combustion of last portion of fuel

C. due to the rise in temperature of diesel engine

D. due to the parts of diesel engine

Correct : B. due to delay in spontaneous combustion of last portion of fuel

45. Which of the following exhaust gas produces least harmless components after its combustion?

A. carbon monoxide

B. ethyne

C. nox

D. n2

Correct : D. n2

46. Which of the following has the highest cetane number?

A. n-heptane

B. n-hexane

C. n-pentane

D. n-butane

Correct : A. n-heptane

47. Choose the correct statement, detonation can be controlled by

A. varying compression ratio

B. using lean mixture

C. retarding the spark timing

D. reducing the r.p.m

Correct : C. retarding the spark timing

48. The ash content in diesel oil should be not be more than

A. 1%

B. 5%

C. 0.1%

D. 0.01%

Correct : D. 0.01%

49. Which of the following is a disadvantage of gaseous fuel?

A. gaseous fuels are very difficult to operate

B. gaseous fuels are highly inflammable

C. gaseous fuels cannot be ignited instantly

D. they produce lot of smoke on combustion

Correct : B. gaseous fuels are highly inflammable

50. Which of the following is a primary gaseous fuel?

A. water gas

B. oil gas

C. refinery gas

D. liquefied petroleum gas

Correct : D. liquefied petroleum gas

51. Which of the following compound is present in natural gas?

A. urea

B. benzoyl peroxide

C. methane

D. sulphonic acid

Correct : C. methane

52. Which type of natural gas is called wet natural gas?

A. containing lower hydrocarbon with more ethane

B. containing higher hydrocarbon with more ethane

C. containing lower hydrocarbon with more methane

D. containing higher hydrocarbon with more methane

Correct : D. containing higher hydrocarbon with more methane

53. Which of the following natural gas has the highest ignition temperature?

A. natural gas obtained from oil fields

B. natural gas obtained from coal fields

C. natural gas obtained from rocks

D. natural gas obtained from sea

Correct : C. natural gas obtained from rocks

54. How much percentile of propane is present in natural gas?

A. 5.5 %

B. 3.7 %

C. 1.8 %

D. 0.5 %

Correct : B. 3.7 %

55. H2S is not present in natural gas.

A. true

B. false

Correct : B. false

56. Which of the following process is used to recover vapours of liquid hydrocarbons in wet natural gas?

A. evaporation

B. distillation

C. cracking

D. adsorption

Correct : D. adsorption

57. Gaseous fuel is most suited for IC engine since physical delay is almost

A. zero

B. more

C. less

D. none of the mentioned

Correct : A. zero

58. Advantage of hydrogen as an IC engine fuel

A. high volumetric efficiency

B. low fuel cost

C. no hc and co emissions

D. none of the mentioned

Correct : C. no hc and co emissions

59. Major constituent of natural gas is

A. ethane

B. methane

C. butane

D. propane

Correct : B. methane

60. At normal ambient temperature and atmospheric pressure, in which form LPG is obtained?

A. solid

B. gaseous

C. liquid

D. solid-liquid

Correct : B. gaseous

61. Under which compound name does the liquid petroleum gas (LPG) are sold?

A. urea

B. ethylene

C. benzoyl peroxide

D. butane

Correct : D. butane

62. By which process only saturated hydrocarbons are obtained in LPG?

A. straight distillation

B. thermal cracking

C. hydrocracking

D. reforming

Correct : A. straight distillation

63. Which type of LPG is mostly produced in Indian refineries?

A. grade a

B. grade b

C. grade c

D. grade d

Correct : B. grade b

64. According to the Bureau of Indian Standards which type of LPG only contains butane in them?

A. grade a

B. grade b

C. grade c

D. grade d

Correct : A. grade a

65. In which regions does the LPG containing propane are found?

A. hotter region

B. monsoon region

C. colder region

D. terrestrial region

Correct : C. colder region

66. Liquid petroleum gas (LPG) is corrosive to steel.

A. true

B. false

Correct : B. false

67. What happens when LPG is inhaled in large concentrations?

A. it kills a person

B. it increases a person’s eye sight

C. it does not have any effect on person’s health

D. it causes a little anaesthesia

Correct : D. it causes a little anaesthesia

68. What is the odour of Liquid Petroleum Gas (LPG)?

A. it is odourless

B. fruity smell

C. undesirable odour

D. alcoholic smell

Correct : A. it is odourless

69. In which type of industries LPG is used as a fuel?

A. steel industries

B. plastic industries

C. in the production of olefins

D. in the production of coal gas

Correct : C. in the production of olefins

70. Power alcohols contains

A. 50-60% of petrol

B. 70-80% of petrol

C. 50-60% of ethanol

D. 70-80% of ethanol

Correct : B. 70-80% of petrol

71. Alcohol can absorb

A. traces of water

B. traces of impurities

C. traces of dust

D. traces of carbon

Correct : A. traces of water

72. Ethyl alcohol reduces the

A. oxygen emissions

B. efficiency

C. polluting emissions

D. nitrogen emissions

Correct : C. polluting emissions

73. Power alcohol is than petrol.

A. bad product

B. less efficient

C. costlier

D. cheaper

Correct : D. cheaper

74. Main disadvantage of the power alcohol is

A. starting troubles

B. more cost

C. increases foreign currency

D. increases octane number of petrol

Correct : A. starting troubles

75. What is the colour of the bio diesel?

A. orange

B. light yellow

C. dark orange

D. light brown

Correct : B. light yellow

76. Natural gas contains

A. methane=70-90%

B. benzene=40-30%

C. hydrogen=50%

D. methane=80-40%

Correct : A. methane=70-90%

77. The calorific value of LPG is

A. 34800kcal/m3

B. 84000kcal/m3

C. 278000kcal/m3

D. 29000kcal/m3

Correct : C. 278000kcal/m3

78. Boiling point of LPG is

A. 546k

B. 373k

C. above room temperature

D. below room temperature

Correct : D. below room temperature

79. CNG has high auto-ignition temperature of

A. 813k

B. 993k

C. 1163k

D. 1273k

Correct : A. 813k

80. To calculate HCV of the fuel, the products of combustion are cooled down to

A. 600f

B. 700f

C. 400f

D. 200f

Correct : A. 600f

81. When the coal is completely burnt in air, then the maximum temperature reached is called

A. calorific value of coal

B. gross calorific value

C. calorific intensity of coal

D. net calorific value

Correct : C. calorific intensity of coal

82. The Bomb calorimeter is used to determine the calorific value of

A. solids and liquid fuels

B. solid and gaseous fuels

C. liquid fuels that can be easily vaporized

D. solid fuels only

Correct : A. solids and liquid fuels

83. Which of the following fuel gas will have the highest calorific value?

A. water gas

B. bio gas

C. producer gas

D. natural gas

Correct : D. natural gas

84. On which property of fuel it’s calorific value is based?

A. specific heat

B. efficiency

C. cost

D. ignition temperature

Correct : B. efficiency

85. What is the unit of calorific value in fps(foot pound sec)?

A. gram calorie (g cal)

B. pound calorie

C. british thermal unit/ft3

D. calorie/gram2

Correct : B. pound calorie

86. At how much temperature does the products of combustion should be cooled down to get Gross Calorific Value?

A. 288 k

B. 315 k

C. 390 k

D. 350 k

Correct : A. 288 k

87. What happens to the hydrogen present in fuel for calculating gross calorific value?

A. it combines with carbon to form methane

B. it combines with chlorine to form hydrochloric acid

C. it combines with oxygen to form hydrogen per oxide

D. it gets converted into steam

Correct : D. it gets converted into steam

88. How does the latent heat of condensation is included in gross calorific value?

A. by the steam produced by the combustion of hydrogen

B. by the combustion of products other than carbon and hydrogen

C. by the combustion of carbon

D. by the total heat produced in the system

Correct : A. by the steam produced by the combustion of hydrogen

89. Net Calorific Value is greater than Gross Calorific Value.

A. true

B. false

Correct : B. false

90. Which of the following properties a good fuel should have?

A. low calorific value

B. moderate calorific value

C. high calorific value

D. high ignition temperature

Correct : C. high calorific value

91. Which of the fuel has the highest calorific value?

A. butane

B. wood

C. kerosene

D. natural gas

Correct : A. butane

92. How should be the ignition temperature of an ideal fuel?

A. moderate

B. low

C. very low

D. very high

Correct : A. moderate

93. Fuel should have low moisture content.

A. true

B. false

Correct : A. true

94. In which type of fuel given below, risk of fire hazard is greatest?

A. solid fuel

B. gaseous fuel

C. liquid fuel

D. peat

Correct : B. gaseous fuel

95. is easy in terms of storage.

A. solid fuel

B. liquid fuel

C. gaseous fuel

D. natural gas

Correct : A. solid fuel

96. Rate of combustion should be

A. very rapid

B. moderate

C. slow

D. very slow

Correct : B. moderate

97. Handling cost of solid fuel is high compared to liquid and gaseous fuel.

A. true

B. false

Correct : A. true

98. The lowest temperature to which the fuel must be preheated so that it starts burning smoothly is called temperature.

A. ignition

B. combustion

C. boiling point of fuel

D. preheating

Correct : A. ignition

99. Which of the following fuel cannot be used in the internal combustion engine?

A. gasoline

B. diesel

C. fuel oil

D. anthracite coal

Correct : D. anthracite coal

100. In which of the following, smoke is produced maximum?

A. solid fuel

B. liquid fuel

C. gaseous fuel

D. coal gas

Correct : A. solid fuel