Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
A:
equal to one
B:
greater than one
C:
less than one
D:
equal to Nusselt number
Answer: A
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During adiabatic saturation process on unsaturated air __________ remains constant.
A:
relative humidity
B:
dew point temperature
C:
dry bulb temperature
D:
wet bulb temperature
Answer: D
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Thermal conductivity of water __________ with rise in temperature.
A:
remains same
B:
decreases
C:
increases
D:
may increase or decrease depending upon temperature
Answer: D
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The heat transfer by radiation __________ a medium.
A:
requires
B:
does not require
C:
D:
Answer: B
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An electrolux refrigerator is called a __________ absorption system.
A:
single fluid
B:
two fluids
C:
three fluids
D:
Answer: C
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