Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The thermostatic expansion valve is also called
A:
constant pressure valve
B:
constant temperature valve
C:
constant superheat valve
D:
none of these
Answer: C
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The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
A:
conduction
B:
free convection
C:
forced convection
D:
radiation
Answer: B
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The power per tonne of refrigeration is
A:
3.5/C.O.P.
B:
C.O.P/3.5
C:
3.5 x C.O.P.
D:
none of these
Answer: A
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R-12 has the __________ freezing point.
A:
lowest
B:
highest
C:
D:
Answer: A
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The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called
A:
sub-cooling or under-cooling
B:
super-cooling
C:
normal cooling
D:
none of these
Answer: A
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