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 8 of 50

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Q71.
Which of the following is not a 'manufactured' fuel ?

a.

LPG

b.

Coal briquettes

c.

Tar

d.

Colloidal fuels

Discuss
Answer: (c).Tar
Q72.
Use of excess of combustion air in the combustion of fuels results in

a.

heat losses.

b.

long flame.

c.

condensation of water vapour from the fuel gas.

d.

none of these.

Discuss
Answer: (a).heat losses.
Q73.
Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?

a.

Ash disposal problem.

b.

Excessive fly-ash discharge from the stack.

c.

High power consumption in its transportation.

d.

Erosion of induced draft fan blades.

Discuss
Answer: (a).Ash disposal problem.
Q74.
Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter.

a.

Junker's

b.

Bomb

c.

Boy's

d.

none of these

Discuss
Answer: (b).Bomb
Q75.
Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has

a.

higher calorific value.

b.

lower hydrogen content.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (d).neither (a) nor (b).
Q76.
The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be

a.

y

b.

0.95 y

c.

1.05 y

d.

1.8 y

Discuss
Answer: (a).y
Q77.
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³ ), while the C.V. is same on weight basis (i.e., kcal/kg) ?

a.

Propane and acetylene

b.

Propane and LPG

c.

Sewage gas and gobar gas

d.

B.F. gas and coke oven gas

Discuss
Answer: (a).Propane and acetylene
Q78.
One kg of carbon for theoretically complete combustion requires __________ kg of air.

a.

11.5

b.

0.5

c.

23

d.

12

Discuss
Answer: (a).11.5
Q79.
If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as

a.

O₂

b.

CO

c.

N₂

d.

SO₂

Discuss
Answer: (d).SO₂
Q80.
By-products are __________ recovered in 'Beehive ovens'.

a.

fully

b.

partially

c.

not at all

d.

negligibly

Discuss
Answer: (c).not at all
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