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 14 of 53

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Q131.
In the free convection regime of pool boiling, the heat flux is proportional to

a.

ฮ”t^1/2

b.

ฮ”t²

c.

ฮ”t^5/4

d.

ฮ”t

Discuss
Answer: (c).ฮ”t^5/4
Q132.
With increase in temperature, the thermal conductivity of fresh lubricating oil

a.

increases

b.

decreases

c.

remains unchanged

d.

may increase or decrease; depends on its composition

Discuss
Answer: (b).decreases
Q133.
Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is

a.

0.4

b.

0.5

c.

0.6

d.

0.7

Discuss
Answer: (d).0.7
Q134.
Kg of liquid evaporated per hour in an evaporator is defined as its

a.

capacity

b.

economy

c.

steam load

d.

none of these

Discuss
Answer: (a).capacity
Q135.
Pick out the correct statement.

a.

1 kcal/hr.m.°C is equal to 1 BTU/hr. ft.°F.

b.

In steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity.

c.

In unsteady state heat conduction, heat flows in the direction of temperature rise.

d.

In heat transfer by forced convection, Grashoff number is very important.

Discuss
Answer: (b).In steady state heat conduction, the only property of the substance which determines the temperature distribution, is the thermal conductivity.
Q136.
Open pan evaporators are preferred to be used, when the solution to be concentrated is

a.

scaling

b.

highly viscous

c.

corrosive

d.

salty

Discuss
Answer: (b).highly viscous
Q137.
The maximum heat transfer co-efficient from steam heating will be attained when the steam is

a.

supersaturated

b.

saturated

c.

wet

d.

none of these

Discuss
Answer: (b).saturated
Q138.
Mode of heat transfer involved in the cooling of air cooled internal combustion engine is

a.

conduction

b.

natural convection

c.

forced convection

d.

none of these

Discuss
Answer: (b).natural convection
Q139.
Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that

a.

there is no internal heat generation.

b.

boundary surfaces are isothermal.

c.

material is anisotropic.

d.

constant temperature gradient exists.

Discuss
Answer: (c).material is anisotropic.
Q140.
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

a.

77.2

b.

71.2

c.

63.8

d.

48.7

Discuss
Answer: (d).48.7
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