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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High sensible heat
High latent heat
Low latent heat
High total heat

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Refrigeration and Air Conditioning
The capillary tube is not used in large capacity refrigeration systems because

It is made of copper
Cost is too high
Capacity control is not possible
Required pressure drop cannot be achieved

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

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

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

210 kJ/ min
420 kJ/ min
840 kJ/ min
21 kJ/ min

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Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

(e₁ + e₂)/ e₁ + e₂ - e₁e₂
e₁ + e₂
1/e₁ + 1/e₂
e₁e₂

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Ammonia
CO2
Freon-11
Freon-22

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MORE MCQ ON Refrigeration and Air Conditioning

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