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 4 of 50

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Q31.
A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

a.

21% excess air has been used for combustion.

b.

21% excess oxygen has been used for combustion.

c.

complete combustion of fuel has taken place.

d.

no excess air has been used for combustion.

Discuss
Answer: (c).complete combustion of fuel has taken place.
Q32.
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

a.

1100

b.

1250

c.

1350

d.

1400

Discuss
Answer: (a).1100
Q33.
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.

a.

80-170

b.

200-300

c.

250-270

d.

280-300

Discuss
Answer: (a).80-170
Q34.
Pick out the wrong statement.

a.

Main constituents of LPG are propane and butane.

b.

C.V. of natural gas is about 10000 KCal/Nm³.

c.

C.V. of LPG is about 26000 kcal/Nm³(11500 kcal/kg).

d.

L.P.G. is lighter than air.

Discuss
Answer: (d).L.P.G. is lighter than air.
Q35.
With increase in C/H ratio of a fuel, the dew point of flue gases

a.

increases

b.

decreases

c.

remains same

d.

may increase or decrease ; depends on the type of fuel

Discuss
Answer: (b).decreases
Q36.
Orsat apparatus

a.

gives flue gas analysis on dry basis.

b.

determines N₂ in flue gas indirectly.

c.

can't determine CO in flue gas, if it is < 0.2%.

d.

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

Discuss
Answer: (d).all (a), (b) & (c).
Q37.
In flue gas analysis by Orsat's apparatus, carbon dioxide is absorbed by

a.

potassium hydroxide.

b.

dilute potassium carbonate.

c.

cuporus chloride.

d.

alkaline pyragllol solution.

Discuss
Answer: (a).potassium hydroxide.
Q38.
Caking index of the coal blend used for the manufacture of metallurgical coke should be around

a.

5

b.

21

c.

40

d.

48

Discuss
Answer: (b).21
Q39.
With increase in moisture content of coal, its

a.

calorific value increases sometimes.

b.

bulk density always decreases.

c.

clinkering tendency during combustion increases.

d.

none of these.

Discuss
Answer: (d).none of these.
Q40.
Proximate analysis of coal determines its __________ content.

a.

moisture, ash, sulphur & volatile matter.

b.

moisture, volatile matter, ash & fixed carbon.

c.

moisture, sulphur, nitrogen & fixed carbon.

d.

none of these.

Discuss
Answer: (b).moisture, volatile matter, ash & fixed carbon.
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