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 5 of 50

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Q41.
Higher efficiency in the combustion of solid fuel can not be achieved by

a.

proper fuel preparation.

b.

keeping the flue gas exhaust temperature very high.

c.

adopting efficient-fuel firing technique & equipment.

d.

supplying correct quantity of combustion air.

Discuss
Answer: (b).keeping the flue gas exhaust temperature very high.
Q42.
A coal containing very high percentage of durain is called __________ coal.

a.

bright

b.

splint

c.

non-banded

d.

boghead

Discuss
Answer: (b).splint
Q43.
During combustion of gaseous fuels, deficiency of air

a.

lengthens the flame.

b.

tends to shorten the flame.

c.

does not affect the flame length.

d.

increases the flame temperature.

Discuss
Answer: (a).lengthens the flame.
Q44.
Gross and net calorific value of a fuel will be the same

a.

if its ash content is zero.

b.

ifits carbon content is very low.

c.

if its hydrogen/hydrogen compound content is zero.

d.

under no circumstances.

Discuss
Answer: (c).if its hydrogen/hydrogen compound content is zero.
Q45.
Low temperature carbonisation

a.

is mainly for producing the smokeless domestic coke.

b.

is meant for the production of 'metallurgical coke'.

c.

produces higher quantity of gas than high temperature carbonisation.

d.

produces less quantity of tar than high temperature carbonisation.

Discuss
Answer: (a).is mainly for producing the smokeless domestic coke.
Q46.
Gray King Assay and Swelling Index of a coal is a measure of its

a.

swelling characteristics.

b.

abradability.

c.

agglutinating properties.

d.

resistance to impact breakage.

Discuss
Answer: (a).swelling characteristics.
Q47.
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

a.

< 37%

b.

>71%

c.

in between 37 & 71%

d.

none of these

Discuss
Answer: (c).in between 37 & 71%
Q48.
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

a.

to check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls.

b.

because, it alone produces unreactive coke.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q49.
Actual flame temperature is always lower than the adiabatic flame temperature, because there is

a.

no possibility of obtaining complete combustion at high temperature.

b.

always loss of heat from the flame.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q50.
Coke oven gas consists mainly of

a.

H₂ & CH₄

b.

CO & CO₂

c.

H₂ & CO

d.

CH₄ & CO

Discuss
Answer: (a).H₂ & CH₄
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