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 44 of 50

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Q431.
When the coal is heated in absence of air, it is called its

a.

deoxidation

b.

gasification

c.

coalification

d.

carbonisation

Discuss
Answer: (d).carbonisation
Q432.
C.V. (kcal/Nm³) of gaseous fuels __________ with increase in molecular weight.

a.

decreases

b.

increases

c.

remains constant

d.

may increase or decrease, depends on combustibles.

Discuss
Answer: (d).may increase or decrease, depends on combustibles.
Q433.
Shatter index of the coke is a measure of its

a.

strength

b.

bulk density

c.

reactivity

d.

none of these

Discuss
Answer: (a).strength
Q434.
Narrow coke ovens as compared to wider coke ovens

a.

produce smaller coke.

b.

produce stronger coke.

c.

require less time of carbonisation.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q435.
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.

Discuss
Answer: (c).either the fuel or the air or both, increases
Q436.
Which of the following has the highest heat of combustion?

a.

H₂

b.

CO

c.

CH₄

d.

C₂H₆

Discuss
Answer: (d).C₂H₆
Q437.
Calorific value of wood gas is about __________ kcal/Nm³.

a.

1500

b.

3300

c.

5400

d.

8500

Discuss
Answer: (b).3300
Q438.
Which adsorbent is used for removing sulphur compounds (S Q, H₂S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

a.

Silica gel

b.

Diatomaceous earth

c.

Basalt

d.

Bog iron (i.e., moist ferric hydroxide)

Discuss
Answer: (d).Bog iron (i.e., moist ferric hydroxide)
Q439.
Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

a.

30

b.

65

c.

120

d.

180

Discuss
Answer: (b).65
Q440.
With increase in calorific value of fuels, their adiabatic flame temperatures

a.

increase

b.

decrease

c.

remain unchanged

d.

may increase or decrease ; depends on the quantity of products of combustion

Discuss
Answer: (d).may increase or decrease ; depends on the quantity of products of combustion
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