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!

So, are you ready to put your Heat Transfer Basics knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Transfer Basics MCQs | Page 10 of 53

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Q91.
The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as

a.

ha = 0.8hL

b.

ha = 2hL

c.

ha = hL

d.

ha = 5hL

Discuss
Answer: (b).ha = 2hL
Q92.
Maximum heat transfer rate is achieved in __________ flow.

a.

co-current

b.

counter-current

c.

turbulent

d.

laminar

Discuss
Answer: (c).turbulent
Q93.
Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law.

a.

Stefan's

b.

Dalton's

c.

Wien's

d.

Kirchoffs

Discuss
Answer: (c).Wien's
Q94.
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
Q95.
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
Q96.
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.
Q97.
Which of the following has maximum thermal conductivity ?

a.

Iron

b.

Coal

c.

Nitrogen

d.

Tar

Discuss
Answer: (a).Iron
Q98.
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
Q99.
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.
Q100.
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
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