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 9 of 50

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Q81.
Narrow coke ovens as compared to wider coke ovens

a.

produce smaller coke.

b.

produce stronger coke.

c.

require less time of carbonisation.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q82.
Preheating of __________ the flame temperature.

a.

the gaseous fuel before combustion decreases

b.

combustion air decreases

c.

either the fuel or the air or both, increases

d.

either the fuel or the air does not affect.

Discuss
Answer: (c).either the fuel or the air or both, increases
Q83.
Which of the following has the highest heat of combustion?

a.

H₂

b.

CO

c.

CH₄

d.

C₂H₆

Discuss
Answer: (d).C₂H₆
Q84.
Calorific value of wood gas is about __________ kcal/Nm³.

a.

1500

b.

3300

c.

5400

d.

8500

Discuss
Answer: (b).3300
Q85.
Which adsorbent is used for removing sulphur compounds (S Q, H₂S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

a.

Silica gel

b.

Diatomaceous earth

c.

Basalt

d.

Bog iron (i.e., moist ferric hydroxide)

Discuss
Answer: (d).Bog iron (i.e., moist ferric hydroxide)
Q86.
Deficiency of combustion air during combustion of a gaseous fuel

a.

lengthens the flame.

b.

causes heat loss of fuel by its partial combustion.

c.

both (a) & (b).

d.

shortens the flame.

Discuss
Answer: (c).both (a) & (b).
Q87.
Froth floatation is used for

a.

washing fine coal dust (< 0.5 mm size).

b.

washing lump coal (> 80 mm size).

c.

removing ash from the coal based on difference in specific gravity of coal and ash.

d.

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

Discuss
Answer: (a).washing fine coal dust (< 0.5 mm size).
Q88.
(64-132) rank coal (ASTM) means a coal with 64%

a.

fixed carbon and having a heat value of 13, 200 BTU/1b.

b.

ash and a heating value of 13, 200 BTU/1b.

c.

fixed carbon and a heating value of 132 BTU/1b.

d.

none of these.

Discuss
Answer: (a).fixed carbon and having a heat value of 13, 200 BTU/1b.
Q89.
The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

a.

CO₂, O₂, CO

b.

CO, O₂, CO₂

c.

CO₂, CO, O₂

d.

O₂, CO₂, CO

Discuss
Answer: (a).CO₂, O₂, CO
Q90.
Which of the following is not a 'manufactured' fuel ?

a.

LPG

b.

Coal briquettes

c.

Tar

d.

Colloidal fuels

Discuss
Answer: (c).Tar
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