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 19 of 53

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Q181.
Baffles are provided in heat exchangers to increase the

a.

fouling factor

b.

heat transfer area

c.

heat transfer co-efficient

d.

heat transfer rate

Discuss
Answer: (c).heat transfer co-efficient
Q182.
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
Q183.
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.
Q184.
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
Q185.
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
Q186.
Mechanical recompression evaporation is used in the production of

a.

alcohol

b.

distilled water

c.

salt

d.

fruits jam

Discuss
Answer: (b).distilled water
Q187.
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
Q188.
A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,

a.

the cooling rate will be the same for the two spheres and hence the two spheres will have equal temperatures at any instant.

b.

both the spheres will emit equal amount of radiation per unit time in the beginning.

c.

both will absorb equal amount of radiation from the surrounding in the beginning.

d.

both(b) & (c).

Discuss
Answer: (d).both(b) & (c).
Q189.
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

a.

higher condensing film co-efficient is desired.

b.

condensate is corrosive in nature.

c.

lower pressure drop through the exchanger is desired.

d.

temperature of the incoming vapor is very high.

Discuss
Answer: (b).condensate is corrosive in nature.
Q190.
Viscosity of gases __________ with increase in temperature.

a.

increase very rapidly

b.

increase slowly

c.

decrease slowly

d.

remain unaffected

Discuss
Answer: (b).increase slowly
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