In case of sensible heating of air, the coil efficiency is given by (where B.P.F

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Question
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = By-pass factor)
Options
A. B.P.F. - 1
B. 1 - B.P.F.
C.
D. 1 + B.RF.

Correct Answer

1 - B.P.F.

Heat Transfer, Refrigeration and Air Conditioning problems

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4. 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
Options
A. h₁ + h₂ + h₃
B. (h₁h₂h₃)^1/3
C.
D. none of these

9. In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
Options
A. which lies between the dry bulb and wet bulb temperatures of the incoming stream
B. which lies between the wet bulb and dew point temperatures of the incoming stream
C. which is lower than the dew point temperature of the incoming stream
D. of adiabatic saturation of incoming stream

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