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 26 of 53

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Q251.
A body is called grey if the monochromatic emissivity of the body is

a.

zero

b.

unity

c.

same for all wavelengths

d.

different for all wavelengths

Discuss
Answer: (c).same for all wavelengths
Q252.
In an extended surface heat exchanger, fluid having lower co-efficient

a.

flows through the tube.

b.

flows outside the tubes.

c.

can flow either inside or outside the tubes.

d.

should not be used as it gives very high pressure drop.

Discuss
Answer: (b).flows outside the tubes.
Q253.
In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is

a.

infinity.

b.

zero.

c.

same as average heat transfer co-efficient for tube side.

d.

none of these.

Discuss
Answer: (a).infinity.
Q254.
The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins.

a.

more

b.

less

c.

same

d.

unpredictable

Discuss
Answer: (b).less
Q255.
Natural convection is characterised by

a.

Grashhoff number

b.

Peclet number

c.

Reynolds number

d.

Prandtl number

Discuss
Answer: (a).Grashhoff number
Q256.
Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is

a.

0.72

b.

4.364

c.

18

d.

83

Discuss
Answer: (b).4.364
Q257.
Thickness of thermal boundary layer is more compared to that of hydrodynamic boundary layer, when the value of Prandtl number is

a.

1

b.

< 1

c.

> 1

d.

> 5

Discuss
Answer: (b).< 1
Q258.
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

a.

K/h0

b.

2K/h0

c.

hi/K

d.

2hi/K

Discuss
Answer: (a).K/h0
Q259.
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows __________ law.

a.

hyperbolic

b.

parabolic

c.

linear

d.

logarithmic

Discuss
Answer: (c).linear
Q260.
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred

a.

through a metallic wall.

b.

by direct contact of hot flue gas with air.

c.

by heating an intermediate material (like chequor bricks) and then heating the air from this hot material.

d.

none of these.

Discuss
Answer: (c).by heating an intermediate material (like chequor bricks) and then heating the air from this hot material.
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