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.

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Heat Transfer Basics MCQs | Page 23 of 53

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Q221.
The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature)

a.

(ΔT)²

b.

(ΔT)⁴

c.

(ΔT)³

d.

√(ΔT)

Discuss
Answer: (c).(ΔT)³
Q222.
In a 1-1 cocurrent heat exchanger, if the tube side fluid outlet temperature is equal to the shell side fluid outlet temperature, then the LMTD is

a.

∞

b.

0

c.

equal to the difference between hot and cold fluids inlet temperature.

d.

equal to the difference between hot fluid inlet temperature and cold fluid outlet temperature.

Discuss
Answer: (b).0
Q223.
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
Q224.
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.
Q225.
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.
Q226.
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
Q227.
Natural convection is characterised by

a.

Grashhoff number

b.

Peclet number

c.

Reynolds number

d.

Prandtl number

Discuss
Answer: (a).Grashhoff number
Q228.
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
Q229.
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
Q230.
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
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