Heat Transfer Basics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer Basics, 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 Heat Transfer Basics 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 Transfer Basics mcq questions that explore various aspects of Heat Transfer Basics problems. Each MCQ is crafted to challenge your understanding of Heat Transfer Basics 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 Heat Transfer Basics 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 Heat Transfer Basics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Heat Transfer Basics MCQs | Page 15 of 53

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Q141.
A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number.

a.

Condensation

b.

Grashoff

c.

Stantan

d.

Brinkman

Discuss
Answer: (d).Brinkman
Q142.
Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be

a.

0.35

b.

0.45

c.

0.55

d.

0.85

Discuss
Answer: (b).0.45
Q143.
The purpose of providing a 'catchall' in the vapor line of an evaporator is to

a.

create vacuum

b.

regulate the vapor flow

c.

vent the non-condensible gases

d.

arrest the entrained liquid

Discuss
Answer: (d).arrest the entrained liquid
Q144.
What is the thermal conductivity of a perfect heat insulator ?

a.

zero

b.

one

c.

∞

d.

between 0 and ∞

Discuss
Answer: (a).zero
Q145.
In a single effect evaporator, the economy is

a.

1

b.

< 1

c.

> 1

d.

none of these

Discuss
Answer: (b).< 1
Q146.
LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is

a.

0

b.

1

c.

>1

d.

<1

Discuss
Answer: (d).<1
Q147.
Which of the following is not concerned with the heat transfer?

a.

Brinkman number

b.

Stanton number

c.

Schmidt number

d.

Peclet number

Discuss
Answer: (c).Schmidt number
Q148.
Latent heat absorbed by 1 lb of water at 212°F, when it is changed to steam at 212°F, may be around __________ BTU.

a.

180

b.

970

c.

3.97

d.

none of these

Discuss
Answer: (a).180
Q149.
In counter flow compared to parallel flow,

a.

LMTD is greater.

b.

less surface area is required for a given heat transfer rate.

c.

both (a) and (b).

d.

more surface area is required for a given heat transfer rate.

Discuss
Answer: (c).both (a) and (b).
Q150.
The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m². The approximate surface temperature (K) is (Stefan-Boltzman constant = 5.67x10⁻⁸ W/m².K⁴)

a.

1000

b.

727

c.

800

d.

1200

Discuss
Answer: (a).1000
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