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 42 of 53

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Q411.
Three material A, B and C of equal thick-nes and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of __________ °C.

a.

40

b.

95

c.

70

d.

50

Discuss
Answer: (c).70
Q412.
The unit of conductance in SI unit is

a.

W/m

b.

W/m²

c.

W/°K

d.

W/m°K

Discuss
Answer: (c).W/°K
Q413.
In a shell and tube heat exchanger, square pitch compared to triangular pitch

a.

gives a higher shell side pressure drop.

b.

gives a lower shell side pressure drop.

c.

can pack more surface area into a shell of given diameter.

d.

none of these.

Discuss
Answer: (b).gives a lower shell side pressure drop.
Q414.
Which of the following has maximum thermal conductivity ?

a.

Iron

b.

Coal

c.

Nitrogen

d.

Tar

Discuss
Answer: (a).Iron
Q415.
A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of materialA is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C.

a.

6

b.

12

c.

18

d.

24

Discuss
Answer: (b).12
Q416.
The film co-efficient between condensing vapour and metal wall increases with

a.

increasing temperature of the vapour.

b.

decreasing temperature of the vapour.

c.

increasing viscosity of the film of condensate.

d.

increasing temperature drop.

Discuss
Answer: (a).increasing temperature of the vapour.
Q417.
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of

a.

2

b.

2^0.8

c.

2^0.2

d.

2^0.5

Discuss
Answer: (b).2^0.8
Q418.
Heat sensitive materials can be concentrated in an evaporator employing

a.

vacuum

b.

high pressure

c.

high residence time

d.

none of these

Discuss
Answer: (a).vacuum
Q419.
A concentric double pipe heat exchanger as compared to the shell and tube heat exchanger for the same heat load requires

a.

less heating surface.

b.

more space.

c.

lower maintenance cost.

d.

none of these.

Discuss
Answer: (b).more space.
Q420.
In a shell and tube heat exchanger, floating head is used for

a.

large temperature differentials.

b.

high heat transfer co-efficient.

c.

low pressure drop.

d.

less corrosion of tubes.

Discuss
Answer: (a).large temperature differentials.
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