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 Basic Chemical 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 Basic Chemical 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 Basic Chemical Engineering topic.

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Fuels and Combustion MCQs | Page 14 of 50

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Q131.
Pick out the wrong statement.

a.

Angle of repose of coal increases with its increasing size.

b.

Specific gravity of coal increases with its increasing maturity.

c.

Refractive index and reflectance of coal increases with the increasing rank of coal.

d.

Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal.

Discuss
Answer: (d).Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal.
Q132.
Percentage of carbon monoxide in blast furnace gas may be around

a.

8

b.

14

c.

22

d.

52

Discuss
Answer: (c).22
Q133.
The main drawback of supplying more excess air in the combustion of fuel is the

a.

excessive power requirement of air blower.

b.

enhanced sensible heat loss in the flue gas.

c.

intermittant and uncontrolled combustion of the fuel.

d.

high exit flue gas temperature from the furnace.

Discuss
Answer: (b).enhanced sensible heat loss in the flue gas.
Q134.
Width of the coke oven towards coke side is slightly more than that on pusher side to

a.

facilitate easy discharging of coke as it swells during carbonisation.

b.

facilitate uniform heating of the oven.

c.

increase the output of the coke.

d.

none of these.

Discuss
Answer: (a).facilitate easy discharging of coke as it swells during carbonisation.
Q135.
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ?

a.

Blast furnace gas

b.

Natural gas

c.

Producer gas

d.

Water gas

Discuss
Answer: (b).Natural gas
Q136.
High rate of heating of coke ovens

a.

may damage its walls due to abrupt excessive swelling of coal.

b.

produces larger size coke.

c.

increases the time of carbonisation.

d.

none of these.

Discuss
Answer: (a).may damage its walls due to abrupt excessive swelling of coal.
Q137.
A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms.

a.

1 to 2

b.

3 to 4

c.

5 to 15

d.

20 to 40

Discuss
Answer: (c).5 to 15
Q138.
Coalification means the

a.

process of conversion of lignite into anthracite.

b.

underground gasification of coal.

c.

complete combustion of coal.

d.

direct hydrogenation of coal.

Discuss
Answer: (a).process of conversion of lignite into anthracite.
Q139.
Hard coke is manufactured from

a.

lignite

b.

bituminous coal

c.

semi-anthracite

d.

anthracite

Discuss
Answer: (b).bituminous coal
Q140.
In low temperature carbonisation of coal, the

a.

yield of coke oven gas is 290 Nm³ /ton dry coal.

b.

volatile matter in coke is zero.

c.

temperature maintained is 700°C.

d.

yield of tar is about 3% of dry coal.

Discuss
Answer: (c).temperature maintained is 700°C.
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