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 11 of 50

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Q101.
Higher fuel combustion efficiency can not be achieved by

a.

preheating of fuel gases & combustion air.

b.

reducing sulphur content in the fuel.

c.

adopting proper fuel firing technique & fuel preparation.

d.

supplying correct amount of combustion air.

Discuss
Answer: (b).reducing sulphur content in the fuel.
Q102.
Softening temperature of coal ash is a measure of the __________ of coal.

a.

caking tendency

b.

coking tendency

c.

clinkering tendency

d.

size stability

Discuss
Answer: (c).clinkering tendency
Q103.
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

a.

more

b.

less

c.

same

d.

data insufficient; can't be predicted.

Discuss
Answer: (c).same
Q104.
Presence of phosphorous in metallurgical coal

a.

is not undersirable.

b.

reduces its calorific value.

c.

badly affects the quality of steel.

d.

increases its caking power.

Discuss
Answer: (c).badly affects the quality of steel.
Q105.
Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

a.

3-5

b.

25-30

c.

60-65

d.

95-100

Discuss
Answer: (b).25-30
Q106.
Fat coal' means a coal having

a.

low calorific value.

b.

high volatile matter,

c.

low ash content.

d.

non smoking tendency.

Discuss
Answer: (b).high volatile matter,
Q107.
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

a.

0.1

b.

2

c.

5

d.

10

Discuss
Answer: (a).0.1
Q108.
Fusion point of coal ash increases with increase in its __________ content.

a.

iron sulphate

b.

iron silicate

c.

lime and magnesia

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q109.
Pick out the wrong statement.

a.

Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal.

b.

Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel.

c.

Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing.

d.

none of these.

Discuss
Answer: (d).none of these.
Q110.
Dry air required to burn 1 kg of carbon completely may be around __________ kg.

a.

11

b.

2

c.

20

d.

38

Discuss
Answer: (a).11
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