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 17 of 21

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Q161.
What is the value of solar absorptivity for polished stainless steel?

a.

0.37

b.

0.36

c.

0.35

d.

0.34

Discuss
Answer: (a).0.37
Q162.
What is the value of solar absorptivity for white marble?

a.

0.45

b.

0.46

c.

0.47

d.

0.48

Discuss
Answer: (b).0.46
Q163.
What is the value of solar absorptivity for asphalt?

a.

0.90

b.

0.80

c.

0.70

d.

0.60

Discuss
Answer: (a).0.90
Q164.
What is the value of solar absorptivity for snow?

a.

0.25

b.

0.26

c.

0.27

d.

0.28

Discuss
Answer: (d).0.28
Q165.
Engineering problems of practical interest are involved with heat exchange between two or more surfaces, and this exchange is strongly dependent upon

(i) Radiative properties

(ii) Temperature levels

(iii) Surface geometrics

Identify the correct statements

a.

1 and 2

b.

1 and 3

c.

2 and 3

d.

1, 2 and 3

Discuss
Answer: (d).1, 2 and 3
Q166.
The fraction of the radiative energy that is diffused from one surface element and strikes the other surface directly with no intervening reflections is called

(i) Radiation shape factor

(ii) Geometrical factor

(iii) Configuration factor

Choose the correct answer

a.

1 only

b.

2 only

c.

1, 2 and 3

d.

3 only

Discuss
Answer: (c).1, 2 and 3
Q167.
The interchange factor is also known as

a.

Equivalent emissivity

b.

Irradiation

c.

Radiosity

d.

Shape factor

Discuss
Answer: (a).Equivalent emissivity
Q168.
For the same type of shapes, the value of radiation shape factor will be higher when

a.

Surfaces are closer

b.

Surfaces are larger and held closer

c.

Surfaces are moved further apart

d.

Surfaces are smaller and held closer

Discuss
Answer: (b).Surfaces are larger and held closer
Q169.
A thin shield of emissivity E3 on both sides is placed between two infinite parallel plates of emissivities E1 and E2 and temperatures T1 and T2. If E1 = E2 = E3, then the fraction radiant energy transfer without shield takes the value

a.

0.25

b.

0.50

c.

0.75

d.

1.25

Discuss
Answer: (b).0.50
Q170.
The grey body shape factor for radiant heat exchange between a small body (emissivity = 0.4) in a large enclosure (emissivity = 0.5) is

a.

0.1

b.

0.2

c.

0.4

d.

0.5

Discuss
Answer: (c).0.4
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