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 9 of 53

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Q81.
Radiation energy is emitted by all the substances, which are above

a.

0°K

b.

0°C

c.

100°C

d.

room temperature

Discuss
Answer: (a).0°K
Q82.
Which one gives the monochromatic emissive power for black body radiation ?

a.

Planck's law

b.

Kirchhoffs law

c.

Wien's law

d.

Stefan-Boltzman law

Discuss
Answer: (a).Planck's law
Q83.
For what value of Prandtl number, St = f/2?

a.

1.5

b.

1

c.

> 1

d.

< 1

Discuss
Answer: (b).1
Q84.
In a shell and tube heat exchanger,

a.

the temperature drops in the two fluids and the wall are proportional to individual resistances.

b.

the temperature drop is inversely proportional to the resistance across which the drop occurs.

c.

there is no relationship between temperature drop and resistance.

d.

the relationship is not generalised.

Discuss
Answer: (a).the temperature drops in the two fluids and the wall are proportional to individual resistances.
Q85.
Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid

a.

for fluids in laminar flow.

b.

for fluids in tubulent flow.

c.

when Grashhoff number is very important.

d.

for liquid metals.

Discuss
Answer: (b).for fluids in tubulent flow.
Q86.
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.

a.

0.38-0.78

b.

0.5-50

c.

100-1000

d.

5-50

Discuss
Answer: (b).0.5-50
Q87.
Use of transverse baffles in a shell and tube heat exchanger is done to increase the

a.

rate of heat transfer.

b.

flow velocity.

c.

turbulence of shell side fluid.

d.

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

Discuss
Answer: (d).all (a), (b) and (c).
Q88.
The actual temperature drop across the heating surface of an evaporator depends on the

a.

liquid depth over the heating surface.

b.

solution being evaporated.

c.

pressure difference between the steam chest and the vapor space above the boiling liquid.

d.

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

Discuss
Answer: (d).all (a), (b) and (c)
Q89.
Economy of a multiple effect evaporator depends upon the

a.

heat balance consideration

b.

rate of heat transfer

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (a).heat balance consideration
Q90.
For the same heat load and mass flow rate in the tube side of a shell and tube heat exchanger, one may use multipass on the tube side, because it

a.

decreases the pressure drop.

b.

decreases the outlet temperature of cooling medium.

c.

increases the overall heat transfer coefficient.

d.

none of these.

Discuss
Answer: (c).increases the overall heat transfer coefficient.
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