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 33 of 50

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Q321.
Which of the following has the least calorific value (kcal/Nm³) ?

a.

Blast furnace gas

b.

Coke oven gas

c.

Sewage gas

d.

Natural gas

Discuss
Answer: (a).Blast furnace gas
Q322.
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.

a.

hydrogenation

b.

gasification

c.

carbonisation

d.

none of these

Discuss
Answer: (a).hydrogenation
Q323.
The combustion reaction, C + O₂ = CO₂, is

a.

exothermic

b.

endothermic

c.

autocatalytic

d.

none of these

Discuss
Answer: (a).exothermic
Q324.
For maximum discharge through a chimney, its height should be

a.

200 meters.

b.

infinitely long.

c.

more than 105.7 metres.

d.

equal to the height of the hot gas column producing draught.

Discuss
Answer: (d).equal to the height of the hot gas column producing draught.
Q325.
Oxygen required for theoretically complete combustion of 1 Nm³ methane is __________ Nm³.

a.

2

b.

4

c.

6

d.

1

Discuss
Answer: (a).2
Q326.
Bomb calorimeter is used for the determination of calorific value of the __________ fuels.

a.

gaseous

b.

solid

c.

liquid

d.

both (b) and (c)

Discuss
Answer: (d).both (b) and (c)
Q327.
As the C/H ratio of the fuel increases, the amount of CO₂ formed on combustion __________ for the same percentage of excess air.

a.

decreases

b.

increases

c.

remains same

d.

may increase or decrease depending on the type of fuel

Discuss
Answer: (b).increases
Q328.
Which of the following fuel gases has the highest calorific value ?

a.

Natural gas.

b.

Coal bed methane (CBM).

c.

Liquefied petroleum gas (LPG).

d.

Sewage gas.

Discuss
Answer: (c).Liquefied petroleum gas (LPG).
Q329.
Calorific value as determined by bomb calorimeter is the

a.

higher calorific value at constant volume.

b.

gross calorific value at constant pressure.

c.

lower calorific value at constant pressure.

d.

net calorific value at constant volume.

Discuss
Answer: (a).higher calorific value at constant volume.
Q330.
Fixed carbon in coal is defined as

a.

that present in volatile matters.

b.

the total quantity of carbon present in the coal.

c.

hundred minus the percentage of volatile matter, ash and moisture.

d.

the one which is present in the residue after combustion.

Discuss
Answer: (c).hundred minus the percentage of volatile matter, ash and moisture.
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