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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The difference between dry bulb temperature and wet bulb temperature, is called

Wet bulb depression
Degree of saturation
Dew point depression
Dry bulb depression

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

None of the listed here
Mean radiant temperature
Effective temperature
Dew point temperature

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Equalize
Increase
None of these
Reduce

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 3
1: 9
9: 1
1: 1

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Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Higher in winter than in summer
Lower in winter than in summer
Same in winter and summer
Not dependent on season

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Ammonia vapour goes into solution
Lithium bromide mixes with ammonia
Weak solution mixes with strong solution
Ammonia vapour is driven out of solution

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