Fuels and Combustion MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Fuels and Combustion, a fundamental topic in the field of Power Plant Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Fuels and Combustion MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Fuels and Combustion mcq questions that explore various aspects of Fuels and Combustion problems. Each MCQ is crafted to challenge your understanding of Fuels and Combustion principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Power Plant Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Fuels and Combustion MCQs are your pathway to success in mastering this essential Power Plant Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Fuels and Combustion. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Fuels and Combustion knowledge to the test? Let's get started with our carefully curated MCQs!

Fuels and Combustion MCQs | Page 6 of 50

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Q51.
When incomplete combustion loss is high, the flue gas analysis shows large amount of

a.

CO₂

b.

CO

c.

O₂

d.

C

Discuss
Answer: (b).CO
Q52.
The gas which contributes maximum to the heating value of natural gas is

a.

CO

b.

CO₂

c.

H₂

d.

CH₄

Discuss
Answer: (d).CH₄
Q53.
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.

a.

100 to 150

b.

350 to 450

c.

550 to 650

d.

700 to 850

Discuss
Answer: (b).350 to 450
Q54.
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

Discuss
Answer: (b).160
Q55.
Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the

a.

requirement of large volume combustion chamber.

b.

risk of explosion.

c.

chances of clinker formation.

d.

incomplete combustion of coal.

Discuss
Answer: (b).risk of explosion.
Q56.
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.

Discuss
Answer: (b).The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn, is called its flash point.
Q57.
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.

Discuss
Answer: (a).controlling the excess air.
Q58.
Laboratory gas is obtained by the cracking of

a.

gasoline

b.

diesel

c.

fuel oil

d.

kerosene

Discuss
Answer: (d).kerosene
Q59.
Bituminous coal

a.

ignites less easily than anthracite.

b.

is generally coking.

c.

burns with smoky yellow flame.

d.

both (b) and (c).

Discuss
Answer: (d).both (b) and (c).
Q60.
Ratio of primary air to secondary air increases with increase in the rank of coal, because the

a.

high rank coals have higher amount of volatile matter.

b.

ratio of fixed carbon to volatile matter increases.

c.

oxygen content progressively decreases.

d.

calorific value of the coal increases.

Discuss
Answer: (b).ratio of fixed carbon to volatile matter increases.
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