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 13 of 50

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Q121.
Very __________ coals are completely devoid of cokability i.e, it is non coking.

a.

young

b.

mature

c.

both 'a' & 'b'

d.

neither 'a' nor 'b'

Discuss
Answer: (c).both 'a' & 'b'
Q122.
Nitrogen in coal

a.

is present upto 1-2%.

b.

comes from protein in parent vegetable matter.

c.

is recovered as ammonia during its carbonisation.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q123.
Advantages of fluidised bed combustion are

a.

reduced NOₓ formation in flue gas.

b.

lower furnace operating temperature.

c.

high heat transfer rate.

d.

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

Discuss
Answer: (d).all (a), (b) & (c).
Q124.
The fuel ratio of a coal is

a.

the ratio of its percentage of fixed carbon to that of volatile matter.

b.

helpful in estimation of its rank.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q125.
Which will have the least volatile matter and hence will be the most difficult to ignite?

a.

Bituminous coal

b.

Coke

c.

Semi-bituminous coal

d.

Aanthracite

Discuss
Answer: (b).Coke
Q126.
Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around __________ percent.

a.

4

b.

96

c.

20

d.

40

Discuss
Answer: (c).20
Q127.
As time passes, the calorific value of stored coal

a.

decreases

b.

increases

c.

remains unaltered

d.

may increase or decrease (depends on the method of storage).

Discuss
Answer: (a).decreases
Q128.
Stack (chimney) height in a big thermal power plant is dictated by the

a.

pollution control aspect.

b.

draught to be created.

c.

limitation of constructional facilities.

d.

none of these.

Discuss
Answer: (b).draught to be created.
Q129.
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

a.

is less liable to spontaneous combustion on storage.

b.

is more difficult to ignite and produces a shorter flame.

c.

requires smaller combustion space and less secondary air.

d.

none of these.

Discuss
Answer: (d).none of these.
Q130.
A travelling grate stoker is meant for the efficient burning of __________ coal.

a.

caking

b.

pulverised

c.

non-caking

d.

high ash

Discuss
Answer: (c).non-caking
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