Fuels And Combustion MCQ Questions & Answers

1

__________ is used as jet engine fuel.

A) Petrol B) Diesel C) Kerosene D) LPG

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Answer & Solution

Answer: Option C

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2

Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

A) 150 B) 1500 C) 3500 D) 5000

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Answer & Solution

Answer: Option B

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3

Coal containing large quantity of __________ are difficult to wash.

A) Ash B) Inherent mineral matter C) Free impurities D) Volatile matter

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Answer & Solution

Answer: Option B

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4

Gobar gas is produced by the __________ of 'gobar' (cow dung).

A) Hydrolysis B) Fermentation C) Oxidation D) Dehydration

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Answer & Solution

Answer: Option B

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5

Preheating of __________ the flame temperature.

A) The gaseous fuel before combustion decreases B) Combustion air decreases C) Either the fuel or the air or both, increases D) Either the fuel or the air does not affect

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Answer & Solution

Answer: Option C

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6

Gross heating value of coal is __________ the net heating value.

A) Higher than B) Lower than C) Same as D) None of these

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Answer & Solution

Answer: Option A

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7

Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm³/ton of dry coal.

A) 60 B) 160 C) 500 D) 750

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Answer & Solution

Answer: Option B

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8

Yield of blast furnace gas is about __________ Nm³/ton of pig iron.

A) 300 B) 2000 C) 5000 D) 10000

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Answer & Solution

Answer: Option B

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9

Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

A) Colour B) Moisture content C) Ash content D) Volatile matter

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Answer & Solution

Answer: Option D

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10

With increase in moisture content of coal, its

A) Calorific value increases B) Caking properties diminish C) Swelling during carbonisation becomes excessive D) None of these

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Answer & Solution

Answer: Option B

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering