Heat Radiation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Radiation, a fundamental topic in the field of Heat Transfer. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Heat Radiation 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 Heat Radiation mcq questions that explore various aspects of Heat Radiation problems. Each MCQ is crafted to challenge your understanding of Heat Radiation principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Heat Transfer tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Radiation MCQs are your pathway to success in mastering this essential Heat Transfer topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Radiation. 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 Heat Radiation knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Radiation MCQs | Page 16 of 21

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Q151.
A cavity in the shape of a frustum of a cone has diameter 30 cm and 60 cm and the height is 80 cm. If the cavity is maintained at temperature of 800 K, determine the heat loss from the cavity when the smaller diameter is at the bottom

a.

6577 W

b.

2367 W

c.

8794 W

d.

3675 W

Discuss
Answer: (a).6577 W
Q152.
A conical cavity of base diameter 15 cm and height 20 cm has inside surface temperature 650 K. If emissivity of each surface is 0.85, determine the net radiative heat transfer from the cavity

a.

168.3 W

b.

158.3 W

c.

148.3 W

d.

138.3 W

Discuss
Answer: (a).168.3 W
Q153.
When a gas or vapor is in the process of oxidation and combustion, it is called as

a.

Oxidation

b.

Flame

c.

Reduction

d.

Combustion

Discuss
Answer: (b).Flame
Q154.
The monochromatic absorption coefficient depends upon

(i) Temperature

(ii) Time

(iii) Pressure

(iv) Wavelength

Identify the correct option

a.

1, 2 and 4

b.

2, 3 and 4

c.

1 and 2

d.

1, 3 and 4

Discuss
Answer: (d).1, 3 and 4
Q155.
Which one of the following is not extremely inert to thermal radiation?

a.

Orgon

b.

Oxygen

c.

Methane

d.

Nitrogen

Discuss
Answer: (c).Methane
Q156.
Consider a beam of monochromatic radiation at wavelength ฮป that enters a layer of absorbing gas. As the beam passes through the gas layer, its intensity is given by

a.

d I ฮป X = โ€“ K ฮป I ฮป X d x

b.

d I ฮป X = โ€“ 2 K ฮป I ฮป X d x

c.

d I ฮป X = โ€“ 3 K ฮป I ฮป X d x

d.

d I ฮป X = โ€“ 4 K ฮป I ฮป X d x

Discuss
Answer: (a).d I ฮป X = โ€“ K ฮป I ฮป X d x
Q157.
Which one is having highest value of fouling factor?

a.

Sea water

b.

Distilled water

c.

Liquid gasoline

d.

Clean river

Discuss
Answer: (c).Liquid gasoline
Q158.
What is the value of fouling factor for sea water?

a.

0.0001-0.0002 m² K/W

b.

0.0002-0.0003 m² K/W

c.

0.0003-0.0004 m² K/W

d.

0.0004-0.0005 m² K/W

Discuss
Answer: (a).0.0001-0.0002 m² K/W
Q159.
What is the value of fouling factor for clean river?

a.

0.0014-0.0018 m² K/W

b.

0.0010-0.0014 m² K/W

c.

0.0006-0.0010 m² K/W

d.

0.0002-0.0006 m² K/W

Discuss
Answer: (d).0.0002-0.0006 m² K/W
Q160.
Which one is having lowest value of fouling factor?

a.

Lake river

b.

Distilled water

c.

Transformers

d.

Lubricating oil

Discuss
Answer: (b).Distilled water
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