Heat Transfer,Refrigeration and Air Conditioning MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer,Refrigeration and Air Conditioning, a fundamental topic in the field of Mechanical 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,Refrigeration and Air Conditioning 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,Refrigeration and Air Conditioning mcq questions that explore various aspects of Heat Transfer,Refrigeration and Air Conditioning problems. Each MCQ is crafted to challenge your understanding of Heat Transfer,Refrigeration and Air Conditioning principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Transfer,Refrigeration and Air Conditioning MCQs are your pathway to success in mastering this essential Mechanical 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,Refrigeration and Air Conditioning. 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,Refrigeration and Air Conditioning knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Transfer,Refrigeration and Air Conditioning MCQs | Page 33 of 40

Discover more Topics under Mechanical Engineering

Q321.
In a refrigeration system, the expansion device is connected between the

a.

compressor and condenser

b.

condenser and receiver

c.

receiver and evaporator

d.

evaporator and compressor

Discuss
Answer: (c).receiver and evaporator
Q322.
The heat rejection factor (HRF) is given by

a.

1 + C.O.P

b.

1 - C.O.P.

c.

1 + (1/C.O.P)

d.

1 - (1/C.O.P)

Discuss
Answer: (c).1 + (1/C.O.P)
Q323.
Wein's law states that the wave length corresponding to __________ is proportional to the absolute temperature.

a.

minimum energy

b.

maximum energy

c.

Can't say

d.

None of these

Discuss
Answer: (b).maximum energy
Q324.
In a domestic vapour compression refrigerator, the refrigerant commonly used is

a.

CO₂

b.

Ammonia

c.

R-12

d.

all of these

Discuss
Answer: (c).R-12
Q325.
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = By-pass factor)

a.

B.P.F. - 1

b.

1 - B.P.F.

c.

1 + B.RF.

d.

None of these

Discuss
Answer: (b).1 - B.P.F.
Q326.
The coefficient of performance (C.O.P.) is the reciprocal of the efficiency of a heat engine.

a.

True

b.

False

c.

Can't say

d.

None of these

Discuss
Answer: (a).True
Q327.
The wet bulb temperature at 100% relative humidity is __________ dry bulb temperature.

a.

same as

b.

lower than

c.

higher than

d.

None of these

Discuss
Answer: (a).same as
Q328.
The freezing point of sulphur dioxide is

a.

-56.6°C

b.

-75.2°C

c.

-77.7°C

d.

-135.8°C

Discuss
Answer: (b).-75.2°C
Q329.
The ratio of the energy absorbed by the body to the total energy falling on it, is called

a.

absorptive power

b.

emissive power

c.

emissivity

d.

none of these

Discuss
Answer: (a).absorptive power
Q330.
In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

a.

which lies between the dry bulb and wet bulb temperatures of the incoming stream

b.

which lies between the wet bulb and dew point temperatures of the incoming stream

c.

which is lower than the dew point temperature of the incoming stream

d.

of adiabatic saturation of incoming stream

Discuss
Answer: (c).which is lower than the dew point temperature of the incoming stream
Page 33 of 40