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 9 of 50

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Q81.
Gray King Assay and Swelling Index of a coal is a measure of its

a.

swelling characteristics.

b.

abradability.

c.

agglutinating properties.

d.

resistance to impact breakage.

Discuss
Answer: (a).swelling characteristics.
Q82.
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

a.

< 37%

b.

>71%

c.

in between 37 & 71%

d.

none of these

Discuss
Answer: (c).in between 37 & 71%
Q83.
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

a.

to check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls.

b.

because, it alone produces unreactive coke.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q84.
Actual flame temperature is always lower than the adiabatic flame temperature, because there is

a.

no possibility of obtaining complete combustion at high temperature.

b.

always loss of heat from the flame.

c.

both (a) and (b).

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) and (b).
Q85.
Coke oven gas consists mainly of

a.

H₂ & CH₄

b.

CO & CO₂

c.

H₂ & CO

d.

CH₄ & CO

Discuss
Answer: (a).H₂ & CH₄
Q86.
Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm³ .

a.

30

b.

300

c.

3000

d.

30, 000

Discuss
Answer: (b).300
Q87.
Coking coals are invariably

a.

lignites

b.

bituminous coals

c.

semi-anthracites

d.

anthracites

Discuss
Answer: (b).bituminous coals
Q88.
Which of the following accounts for maximum energy loss in a boiler ?

a.

Flue gases.

b.

Ash content in the fuel.

c.

Incomplete combustion.

d.

Unburnt carbon in flue gases.

Discuss
Answer: (a).Flue gases.
Q89.
'Fuel' can be defined as a substance which produces heat by

a.

combustion.

b.

nuclear fission.

c.

nuclear fusion.

d.

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

Discuss
Answer: (d).all (a), (b) & (c).
Q90.
Washing of coal

a.

reduces its sulphur and ash content.

b.

controls its ash fusibility and increases its calorific value.

c.

improves its coking properties.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
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