Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The coefficient of performance (C.O.P.) is the reciprocal of the efficiency of a heat engine.
A:
True
B:
False
C:
D:
Answer: A
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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:
D:
1 + B.RF.
Answer: B
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The vertical and uniformly spaced lines on a psychrometric chart indicates
A:
dry bulb temperature
B:
wet bulb temperature
C:
dew point temperature
D:
specific humidity
Answer: A
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The dehumidification process, on the psychrometric chart, is shown by
A:
horizontal Sine
B:
vertical line
C:
inclined line
D:
curved line
Answer: B
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A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
A:
h1 + h2 + h3
B:
(h1h2h3)1/3
C:
D:
none of these
Answer: D
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