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 32 of 53

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Q311.
200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 x 10⁻³ kg/m².s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m²/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)

a.

0.5

b.

0.05

c.

0.1

d.

0.15

Discuss
Answer: (c).0.1
Q312.
In case of a vertical tube evaporator, with increase in the liquor level, the

a.

capacity of the evaporator is decreased.

b.

capacity of the evaporator is increased.

c.

true temperature drop increases.

d.

both (b) and (c).

Discuss
Answer: (a).capacity of the evaporator is decreased.
Q313.
The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law.

a.

wavelength of radiation

b.

nature of the body

c.

temperature of the body

d.

none of these

Discuss
Answer: (c).temperature of the body
Q314.
For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally

a.

decreases

b.

increases

c.

remains unchanged

d.

increases exponentially

Discuss
Answer: (a).decreases
Q315.
Mechanical recompression evaporation is used in the production of

a.

alcohol

b.

distilled water

c.

salt

d.

fruits jam

Discuss
Answer: (b).distilled water
Q316.
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
Q317.
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
Q318.
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
Q319.
What is the thermal conductivity of a perfect heat insulator ?

a.

zero

b.

one

c.

∞

d.

between 0 and ∞

Discuss
Answer: (a).zero
Q320.
In a single effect evaporator, the economy is

a.

1

b.

< 1

c.

> 1

d.

none of these

Discuss
Answer: (b).< 1
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