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.

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 42 of 50

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Q411.
The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be

a.

21

b.

77

c.

79

d.

29

Discuss
Answer: (a).21
Q412.
A good quality coal should have

a.

low fusion point of ash

b.

high ash content

c.

high sulphur

d.

none of these

Discuss
Answer: (d).none of these
Q413.
High amount of sulphur and phosphorous in coke causes

a.

decrease in its calorific value.

b.

increase in its strength.

c.

brittleness of steel made by using it.

d.

none of these.

Discuss
Answer: (c).brittleness of steel made by using it.
Q414.
The difference between total carbon and fixed carbon of coal will be minimum in case of

a.

lignite

b.

bituminous coal

c.

anthracite

d.

high temperature coke (V.M < 0.5%)

Discuss
Answer: (d).high temperature coke (V.M < 0.5%)
Q415.
A sample of natural gas containing 80% methane (CH₄) and rest nitrogen (N₂) is burnt with 20% excess air. With 80% of the combustibles producing CO₂ and the reminder going to CO, the Orsat analysis in volume percent is

a.

CO₂ : 6.26, CO : 1.56, O₂ : 3.91, H₂O :15.66, N₂ : 72.60

b.

CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02

c.

CO₂ : 6.39, CO : 1.60, O₂ : 3.99, H₂O:25.96, N₂:72.06

d.

CO₂ : 7.60, CO : 1.90, O₂ : 4.75, N₂ : 85.74

Discuss
Answer: (b).CO₂ : 7.42, CO : 1.86, O₂ : 4.64, N₂:86.02
Q416.
Which of the following would require maximum amount of % excess air for complete combustion ?

a.

Coke oven gas

b.

Furnace oil

c.

Pulverised coal

d.

Lump coal (fixed on chain grate).

Discuss
Answer: (d).Lump coal (fixed on chain grate).
Q417.
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

a.

incomplete combustion.

b.

complete combustion.

c.

high oxygen in flue gas.

d.

none of these.

Discuss
Answer: (b).complete combustion.
Q418.
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain

a.

CO

b.

CO₂

c.

H₂O

d.

both (b) & (c)

Discuss
Answer: (d).both (b) & (c)
Q419.
Low temperature oxidation of coal is accelerated by the

a.

storage in large heaps.

b.

storage in compressed piles.

c.

absence of porous or friable particles.

d.

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

Discuss
Answer: (a).storage in large heaps.
Q420.
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of

a.

tar

b.

benzol

c.

ammonia

d.

none of these

Discuss
Answer: (c).ammonia
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