Fuels And Combustion MCQ Questions & Answers | Chemical Engineering Page-7 section-2

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61.
Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

A. The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot

B. It reduces its calorific value tremendously

C. It reduces its flame temperature tremendously

D. There are chances of explosion during preheating

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62.
Pick out the wrong statement.

A. LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of metals

B. The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point

C. Each ton of petroleum oil on distillation produces about 30 - 50 Nm³ of gas

D. Maximum yield of naphthalene is obtained on distillation of crude oil

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63.
Benzene is used

A. As a motor fuel

B. As an explosive

C. For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)

D. As a perfume

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64.
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

A. Decolourisation of sugar

B. Solvent recovery from air and gases

C. Absorption of gases and vapor

D. Electrode manufacture

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65.
Bright coal

A. Contains more than 90% durain

B. Contains more than 90% fussain

C. Contains mainly vitrain & clarain and is generally coking

D. Is non-coking

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66.
'Fuel' can be defined as a substance which produces heat by

A. Combustion

B. Nuclear fission

C. Nuclear fusion

D. All of the above

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67.
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

A. 50

B. 1000

C. 5000

D. 10000

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68.
Caking coal is desirable for

A. Burning on travelling grate

B. Coke making

C. Burning on firebars

D. All of the above

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69.
When steam is passed over coal resulting in the endothermic reaction represent by, C + H₂O = CO + H₂, it is called the __________ of coal.

A. Carbonisation

B. Oxidation

C. Coalification

D. Gasification

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70.
Calorific value of

A. Light paraffinic fuel oils is equal to that of equivalent olefins

B. N-paraffin is lower than that of iso-paraffins of the same compounds

C. Light paraffinic fuel oils is higher than that of equivalent olefins

D. Light paraffinic fuel oils is lower than that of equivalent olefins

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

61. Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

Answer & Solution

62. Pick out the wrong statement.

Answer & Solution

63. Benzene is used

Answer & Solution

64. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

Answer & Solution

65. Bright coal

Answer & Solution

66. 'Fuel' can be defined as a substance which produces heat by

Answer & Solution

67. Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

Answer & Solution

68. Caking coal is desirable for

Answer & Solution

69. When steam is passed over coal resulting in the endothermic reaction represent by, C + H2O = CO + H2, it is called the __________ of coal.

Answer & Solution

70. Calorific value of

Answer & Solution

Read More Section(Fuels and Combustion)

61.
Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because

62.
Pick out the wrong statement.

63.
Benzene is used

64.
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

65.
Bright coal

66.
'Fuel' can be defined as a substance which produces heat by

67.
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

68.
Caking coal is desirable for

69.
When steam is passed over coal resulting in the endothermic reaction represent by, C + H₂O = CO + H₂, it is called the __________ of coal.

70.
Calorific value of