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 7 of 50

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Q61.
Blast furnace coke is made from coal by

a.

low temperature carbonisation.

b.

high temperature carbonisation.

c.

medium temperature carbonisation.

d.

heating the coal in an oven in presence of air.

Discuss
Answer: (b).high temperature carbonisation.
Q62.
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

a.

300

b.

2000

c.

5000

d.

10000

Discuss
Answer: (b).2000
Q63.
Coke oven gas is stripped of its H₂S and mercaptans content by

a.

absorption in wash oil.

b.

adsorption on bog iron bed.

c.

bubbling it through dilute sulphuric acid.

d.

adsorption on silica gel.

Discuss
Answer: (b).adsorption on bog iron bed.
Q64.
In Lurgi coal gasifier,

a.

coking coals cannot be used.

b.

low carbon conversion efficiency is achieved.

c.

entrainment of solids is higher.

d.

larger quantity of coal can be processed.

Discuss
Answer: (d).larger quantity of coal can be processed.
Q65.
Mineral matter content (M) and ash content (A) in coal are approximately related as

a.

M = 1.1A

b.

M = A

c.

M = 1.5A

d.

M = 2A

Discuss
Answer: (a).M = 1.1A
Q66.
Use of pulverised coal in boiler furnace provides

a.

high calorific value.

b.

better combustion.

c.

smokeless burning.

d.

less erosion on furnace walls.

Discuss
Answer: (b).better combustion.
Q67.
Deficiency of combustion air during combustion of a gaseous fuel

a.

lengthens the flame.

b.

causes heat loss of fuel by its partial combustion.

c.

both (a) & (b).

d.

shortens the flame.

Discuss
Answer: (c).both (a) & (b).
Q68.
Froth floatation is used for

a.

washing fine coal dust (< 0.5 mm size).

b.

washing lump coal (> 80 mm size).

c.

removing ash from the coal based on difference in specific gravity of coal and ash.

d.

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

Discuss
Answer: (a).washing fine coal dust (< 0.5 mm size).
Q69.
(64-132) rank coal (ASTM) means a coal with 64%

a.

fixed carbon and having a heat value of 13, 200 BTU/1b.

b.

ash and a heating value of 13, 200 BTU/1b.

c.

fixed carbon and a heating value of 132 BTU/1b.

d.

none of these.

Discuss
Answer: (a).fixed carbon and having a heat value of 13, 200 BTU/1b.
Q70.
The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively

a.

CO₂, O₂, CO

b.

CO, O₂, CO₂

c.

CO₂, CO, O₂

d.

O₂, CO₂, CO

Discuss
Answer: (a).CO₂, O₂, CO
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