Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

21.
The wet bulb temperature lines, on the psychrometric chart, are curved lines.
True
False
Answer: Option
Explanation:
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22.
The sensible heat factor during cooling and dehumidification process is given by (where h1 = Enthalpy of air entering the cooling coil, h2 = Enthalpy of air leaving the cooling coil, and hA = Enthalpy of air at the end of dehumidification process)
Answer: Option
Explanation:
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23.
Thermal diffusivity is a
function of temperature
physical property of a substance
dimensionless parameter
all of these
Answer: Option
Explanation:
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24.
The condition of refrigerant after leaving the compressor and before entering the condenser is superheated vapour.
Yes
No
Answer: Option
Explanation:
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25.
The total radiation from a black body per second per unit area is __________ fourth power of the absolute temperature. This statement is known as Stefan-Boltzmann law.
equal to
directly proportional to
inversely proportional to
Answer: Option
Explanation:
No answer description is available. Let's discuss.