Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

41.
Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.
True
False
Answer: Option
Explanation:
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42.
Moisture should be removed from refrigerants to avoid
freezing at the expansion valve
restriction to refrigerant flow
corrosion of steel plates
all of these
Answer: Option
Explanation:
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43.
Which of the following statement is wrong?
The value of C.O.P. is always greater than one.
In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour.
The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region.
none of the above
Answer: Option
Explanation:
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44.
During humidification process, dry bulb temperature
remains constant
increases
decreases
Answer: Option
Explanation:
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45.
Fourier's law of heat conduction gives the heat flow for
irregular surfaces
non-uniform temperature surfaces
one dimensional cases only
two dimensional cases only
Answer: Option
Explanation:
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