Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

1.
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)
25°C DBT and 100% RH
20°C DBT and 80% RH
22°C DBT and 60% RH
25°C DBT and 40% RH
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The dry bulb temperature lines, on the psychrometric chart are
vertical and uniformly spaced
horizontal and uniformly spaced
horizontal and non-uniformly spaced
curved lines
Answer: Option
Explanation:
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3.
The pressure at the outlet of a refrigerant compressor is called
suction pressure
discharge pressure
critical pressure
back pressure
Answer: Option
Explanation:
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4.
A simple air cooling system is good for __________ flight speeds.
low
high
Answer: Option
Explanation:
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5.
The highest temperature during the cycle in a vapour compression system occurs after evaporation.
True
False
Answer: Option
Explanation:
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