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 30 of 50

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Q291.
Which of the following has the highest gross calorific value ?

a.

Blast furnace gas

b.

Coke oven gas

c.

Carburetted water gas

d.

Oil refinery gas

Discuss
Answer: (d).Oil refinery gas
Q292.
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

a.

presence of large quantity of hydrogen in the fuel.

b.

low calorific value of the fuel.

c.

high sulphur content in the fuel.

d.

lack of thorough mixing of fuel with air.

Discuss
Answer: (d).lack of thorough mixing of fuel with air.
Q293.
Efficient burning of anthracite coal requires

a.

low preheat of air.

b.

fine grinding.

c.

high excess air.

d.

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

Discuss
Answer: (b).fine grinding.
Q294.
C/H ratio is the minimum in case of

a.

furnace oil

b.

natural gas

c.

coal

d.

naphtha

Discuss
Answer: (b).natural gas
Q295.
Ignition temperature decreases progressively from anthracite to lignite, because

a.

volatile matter content increases.

b.

carbon content decreases.

c.

moisture content increases.

d.

ash content increases.

Discuss
Answer: (a).volatile matter content increases.
Q296.
Which of the following fuel gases is heavier than air ?

a.

Blast furnace gas

b.

Coke oven gas

c.

Natural gas

d.

Water gas

Discuss
Answer: (a).Blast furnace gas
Q297.
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

a.

70

b.

85

c.

105

d.

145

Discuss
Answer: (c).105
Q298.
Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt using theoretical amount of air in

a.

air

b.

oxygen

c.

either (a) or (b)

d.

either (a) or (b) without gain or loss of heat

Discuss
Answer: (d).either (a) or (b) without gain or loss of heat
Q299.
Use of preheated air for combustion of fuel in the furnace, increases the

a.

scale losses of the furnace stock.

b.

calorific value of the fuel.

c.

flame temperature.

d.

none of these.

Discuss
Answer: (c).flame temperature.
Q300.
Which of the following can be made into briquettes without the use of a binder ?

a.

lignite

b.

Bituminous coal

c.

Anthracite coal

d.

None of these

Discuss
Answer: (a).lignite
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