Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

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81.
Percentage of hydrogen in coke oven gas may be around

A. 10

B. 25

C. 45

D. 60

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82.
Percentage of methane in coke oven gas may be around

A. 5

B. 15

C. 25

D. 50

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83.
In Lurgi coal gasifier,

A. Coking coals cannot be used

B. Low carbon conversion efficiency is achieved

C. Entrainment of solids is higher

D. Larger quantity of coal can be processed

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84.
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

A. Density

B. Porosity

C. Electrical resistivity

D. None of these

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85.
__________ present in coal is not determined in its ultimate analysis.

A. Fixed carbon

B. Total carbon

C. Hydrogen

D. Nitrogen

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86.
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

A. To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls

B. Because, it alone produces unreactive coke

C. Both A & B

D. Neither A nor B

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87.
Which of the following is not a by-product fuel?

A. Pitch

B. Blast furnace gas

C. Petrol

D. Refinery gas

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88.
Which of the following is the most reactive (as regards the formation of CO + H₂ from C + H₂O)?

A. Blast furnace coke

B. Low temperature coke

C. Anthracite coal

D. Sub-bituminous coal

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89.
The combustion reaction, C + O₂ = CO₂, is

A. Exothermic

B. Endothermic

C. Autocatalytic

D. None of these

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90.
For long flame and easy ignition, the coal used should have

A. High volatile matter

B. Low ash

C. High calorific value

D. High ash

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

81. Percentage of hydrogen in coke oven gas may be around

Answer & Solution

82. Percentage of methane in coke oven gas may be around

Answer & Solution

83. In Lurgi coal gasifier,

Answer & Solution

84. During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

Answer & Solution

85. __________ present in coal is not determined in its ultimate analysis.

Answer & Solution

86. Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

Answer & Solution

87. Which of the following is not a by-product fuel?

Answer & Solution

88. Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)?

Answer & Solution

89. The combustion reaction, C + O2 = CO2, is

Answer & Solution

90. For long flame and easy ignition, the coal used should have

Answer & Solution

Read More Section(Fuels and Combustion)

81.
Percentage of hydrogen in coke oven gas may be around

82.
Percentage of methane in coke oven gas may be around

83.
In Lurgi coal gasifier,

84.
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

85.
__________ present in coal is not determined in its ultimate analysis.

86.
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

87.
Which of the following is not a by-product fuel?

88.
Which of the following is the most reactive (as regards the formation of CO + H₂ from C + H₂O)?

89.
The combustion reaction, C + O₂ = CO₂, is

90.
For long flame and easy ignition, the coal used should have