same
low
very low
high
✅ The correct answer is option C.
Heat Transfer
The drier in a refrigeration system removes moisture in the system.
Correct
Incorrect
✅ The correct answer is option A.
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.
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.
The cooling of air, without any change in its specific humidity, is known as sensible cooling.
Correct
Incorrect
✅ The correct answer is option A.
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.
The wet bulb depression is zero when relative humidity is
zero
0.5
0.75
1
✅ The correct answer is option D.
In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
ammonia
carbon dioxide
sulphur dioxide
R-12
✅ The correct answer is option A.
When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by
operating the machine at higher speeds
operating the machine at lower speeds
raising the higher temperature
lowering the higher te
✅ The correct answer is option D.
The overall coefficient of heat transfer is used in problems of
conduction
convection
radiation
conduction and convect
✅ The correct answer is option D.