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 20 of 53

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Q191.
In Biot number, the characteristic length used is the ratio of the __________ of the solid.

a.

volume to surface area

b.

perimeter to surface area

c.

surface area to volume

d.

surface area to perimeter

Discuss
Answer: (a).volume to surface area
Q192.
Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

a.

Tar dolomite bricks followed by asbestos.

b.

Fireclay refractory followed by aluminium sheet.

c.

Cotton followed by aluminium foil.

d.

85% magnesia cement and glass wool.

Discuss
Answer: (d).85% magnesia cement and glass wool.
Q193.
Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re^0.8 . Prⁿ, is not valid, if the value of

a.

n = 0.4 is used for heating.

b.

n = 0.3 is used for cooling.

c.

Reynolds number for the flow involved is > 10000.

d.

Reynolds number for the flow involved is < 2100.

Discuss
Answer: (d).Reynolds number for the flow involved is < 2100.
Q194.
Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

a.

Square pitch

b.

Triangular pitch

c.

Diagonal square pitch

d.

None of these

Discuss
Answer: (b).Triangular pitch
Q195.
In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid

a.

is inversely proportional to the resistance across which the drop occurs.

b.

and the wall are proportional to individual resistances.

c.

and the wall is not related.

d.

none of these.

Discuss
Answer: (b).and the wall are proportional to individual resistances.
Q196.
Increasing the liquor level in the evaporator results in the

a.

decreased capacity.

b.

increase in liquor film co-efficient.

c.

decreased effect of hydrostatic head.

d.

increased true temperature drop.

Discuss
Answer: (a).decreased capacity.
Q197.
Pick out the wrong statement.

a.

Orifice baffles are never used in a shell and tube heat exchanger.

b.

Pressure drop on the shell side of a heat exchanger depends upon tube pitch also.

c.

In a horizontal tube evaporator, surface blanketing by air is avoided.

d.

Split ring type and pull through type floating heads are two commonly used floating heads is heat exchangers.

Discuss
Answer: (a).Orifice baffles are never used in a shell and tube heat exchanger.
Q198.
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

a.

laminar

b.

transition

c.

both 'a' & 'b'

d.

highly turbulent

Discuss
Answer: (d).highly turbulent
Q199.
The actual temperature drop across the heating surface in an evaporator depends on the

a.

feed.

b.

depth of liquid over heating surface.

c.

pressure difference between steam chest and vapour space.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q200.
Which of the following is not used as a medium for high temperature heating ?

a.

Dowtherm

b.

mercury

c.

liquid metal (e.g. molten sodium)

d.

fused salts (e.g., an eutectic mixture of 53% KNO₃, 40% NaNO₂and 7% NaNO₃)

Discuss
Answer: (b).mercury
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