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 27 of 50

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Q261.
Insitu theory and drift theory are related to the

a.

origin of petroleum oil.

b.

origin of coal.

c.

coalification.

d.

variation of coal quality with depth.

Discuss
Answer: (b).origin of coal.
Q262.
Pick out the wrong statement.

a.

Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal.

b.

Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery.

c.

A high swelling index number of coking coal indicates poor caking properties of coal.

d.

Wash oil is used for scrubbing benzol from coke oven gas.

Discuss
Answer: (c).A high swelling index number of coking coal indicates poor caking properties of coal.
Q263.
Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.

a.

2.5

b.

0.5

c.

10

d.

20

Discuss
Answer: (a).2.5
Q264.
Which of the following will generate maximum volume of product of complete combustion (Nm³/Nm³ of fuel) ?

a.

Carburetted water gas

b.

Blast furnace gas

c.

Natural gas

d.

Producers' gas

Discuss
Answer: (c).Natural gas
Q265.
Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?

a.

Multicyclones

b.

Bag filter

c.

Wet scrubber

d.

Hydrocyclones.

Discuss
Answer: (b).Bag filter
Q266.
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of

a.

less air for combustion.

b.

correct amount of air for combustion.

c.

too much air for combustion.

d.

pulverised coal in boilers.

Discuss
Answer: (c).too much air for combustion.
Q267.
Pick out the wrong statement.:

a.

Carburetted water gas is also called blue gas.

b.

Coals are divided in four species according to their carbon content in Seylor's classification.

c.

Carbonisation time in a by-product coke oven is about 16 hours.

d.

Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons.

Discuss
Answer: (a).Carburetted water gas is also called blue gas.
Q268.
A good metallurgical coke should have very low

a.

sulphur & phosphorous content

b.

porosity

c.

fusion point of its ash

d.

hardness & strength

Discuss
Answer: (a).sulphur & phosphorous content
Q269.
Cannel coal

a.

is non-coking.

b.

has a high volatile matter content and burns with a luminous smoky flame.

c.

is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q270.
Coals used for the generation of producer gas should have

a.

high caking index.

b.

low fusion point of ash.

c.

high volatile matter content.

d.

very low ash content (8-10%).

Discuss
Answer: (c).high volatile matter content.
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