1. The wet bulb depression is zero when relative humidity is
zero
0.5
0.75
1
✅ The correct answer is option D.
Heat Transfer, Refrigeration and Air Conditioning MCQs
2. The cooling of air, without any change in its specific humidity, is known as sensible cooling.
Correct
Incorrect
✅ The correct answer is option A.
3. The condition of refrigerant as it leaves the compressor in a vapour compression system is
saturated liquid
wet vapour
dry saturated vapour
superheated vapour
✅ The correct answer is option D.
4. The drier in a refrigeration system removes moisture in the system.
Correct
Incorrect
✅ The correct answer is option A.
5. The power per tonne of refrigeration is
3.5/C.O.P.
C.O.P/3.5
3.5 x C.O.P.
none of these
✅ The correct answer is option A.
6. The process of heat transfer from one particle of the body to another is called conduction, when the particles of the body
move actually
do not move actually
affect the intervening medium
does not affect the in
✅ The correct answer is option B.
7. The use of heat exchangers is made in
radiators in automobile
condensers and boilers in steam plants
condensers and evaporators in refrigeration and air conditioning units
all of the above
✅ The correct answer is option D.
8. The emissivity of a polished silver body is __________ as compared to black body.
same
low
very low
high
✅ The correct answer is option C.
9. When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Correct
Incorrect
✅ The correct answer is option A.
10. The sensible heat during humidification process decreases.
TRUE
FALSE
✅ The correct answer is option B.