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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Condenser tubes
Evaporator tubes
Capillary tubes
Refrigerant cooling tubes

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Refrigeration and Air Conditioning
During sensible cooling,

Specific humidity increases
Wet bulb temperature increases
Relative humidity remains constant
Partial pressure of vapour remains constant

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Refrigeration and Air Conditioning
In a psychrometric chart, specific humidity (moisture content) lines are

Horizontal and uniformly spaced
Vertical and uniformly spaced
Curved lines
Horizontal and non-uniformly spaced

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Refrigeration and Air Conditioning
The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

Dalton's law of partial pressures
Newton's law of gases
Avogadro's hypothesis
Kinetic theory of gases

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Sulphur dioxide
Carbon dioxide
R-12
Ammonia

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Power per TR is low
System has high C.O.P.
Mass of refrigerant circulated in the system is low
Mass of the refrigeration equipment is low

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