Fuels and Combustion - Section 1 (5)

Directions to Solve

Fuels and Combustion - Section 1

Fuels and Combustion is a field and there are problems available to
solve in this category. You will find the MCQs and can solve them easily.

33.

Laboratory gas is obtained by the cracking of

A.	gasoline
B.	diesel
C.	fuel oil
D.	kerosene

Answer: Option D

Explanation:

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34.

Stack heat losses can be minimised by

A.	controlling the excess air.
B.	oxygen enrichment of combustion air.
C.	using low c.v. fuels.
D.	maintaining proper draft in the furnace.

Answer: Option A

Explanation:

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35.

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.

Answer: Option B

Explanation:

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36.

High temperature in gasification of coal favours

A.	high production of CO2.
B.	low production of CO2.
C.	high production of CO.
D.	both (b) and (c).

Answer: Option D

Explanation:

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37.

Which of the following constituents of coal is the most important in the production of coke?

A.	Moisture
B.	Ash
C.	Volatiles
D.	Carbon

Answer: Option D

Explanation:

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38.

Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its

A.	caking index.
B.	yield of carbonised products.
C.	friability & oxygen content.
D.	calorific value.

Answer: Option C

Explanation:

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39.

Combustion reaction of fuels is a/an __________ reaction.

A.	auto catalytic
B.	exothermic
C.	endothermic
D.	none of these

Answer: Option B

Explanation:

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40.

Junker's calorimeter is used to determine the calorific value of

A.	pulverised coal
B.	gaseous fuels
C.	fuel oil
D.	none of these

Answer: Option B

Explanation:

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