Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

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131.
With increases in carbonisation temperature

A. Coke even gas yield increases

B. Tar yield increases

C. Hydrogen percentage in the coke oven gas decreases

D. Methane percentage in the coke oven gas increases

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132.
Coke ovens in steel plant are heated by

A. Electricity

B. Coke oven gas

C. Mixed gas

D. Both B & C

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133.
Combustion reaction of fuels is a/an __________ reaction.

A. Auto catalytic

B. Exothermic

C. Endothermic

D. None of these

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134.
Which of the following has the highest flame velocity?

A. H₂

B. CO

C. CH₄

D. C₂H₆

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135.
Which of the following gaseous fuels has the lowest calorific value?

A. Gobar gas

B. Refinery gas

C. Converter gas

D. Blast furnace gas

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136.
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

A. Decreases

B. Increases

C. Remains same

D. May increase or decrease depending on the type of fuel

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137.
Which of the following would require least amount of secondary air for combustion?

A. Coke breeze containing 25% ash and 2% volatile matter

B. Anthracite containing 10% volatile matter and 8% ash

C. Bituminous coal containing 20% ash and 25% volatile matter

D. Semi-bituminous coal containing 25% ash and 20% volatile matter

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138.
The function of secondary combustion air is to

A. Pneumatically convey the pulverised coal

B. Completely burn the volatile matter

C. Burn the lumpy coal

D. None of these

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139.
KOH solution used in orsat apparatus absorbs

A. CO₂

B. SO₂

C. Both A & B

D. Neither A nor B

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140.
When the coal is heated in absence of air, it is called its

A. Deoxidation

B. Gasification

C. Coalification

D. Carbonisation

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

131. With increases in carbonisation temperature

Answer & Solution

132. Coke ovens in steel plant are heated by

Answer & Solution

133. Combustion reaction of fuels is a/an __________ reaction.

Answer & Solution

134. Which of the following has the highest flame velocity?

Answer & Solution

135. Which of the following gaseous fuels has the lowest calorific value?

Answer & Solution

136. As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion __________ for the same percentage of excess air.

Answer & Solution

137. Which of the following would require least amount of secondary air for combustion?

Answer & Solution

138. The function of secondary combustion air is to

Answer & Solution

139. KOH solution used in orsat apparatus absorbs

Answer & Solution

140. When the coal is heated in absence of air, it is called its

Answer & Solution

Read More Section(Fuels and Combustion)

131.
With increases in carbonisation temperature

132.
Coke ovens in steel plant are heated by

133.
Combustion reaction of fuels is a/an __________ reaction.

134.
Which of the following has the highest flame velocity?

135.
Which of the following gaseous fuels has the lowest calorific value?

136.
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

137.
Which of the following would require least amount of secondary air for combustion?

138.
The function of secondary combustion air is to

139.
KOH solution used in orsat apparatus absorbs

140.
When the coal is heated in absence of air, it is called its