Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)

Refrigeration and Air Conditioning
Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)

[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]

0.622 Pv / (Pb - Pv)

None of these

μ/[1 - (1 - μ) (Ps/Pb)]

[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]

0.622 Pv / (Pb - Pv)

None of these

μ/[1 - (1 - μ) (Ps/Pb)]

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Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Copper

Brass

Steel

Aluminium

Copper

Brass

Steel

Aluminium

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Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

T₂/(T₂ - T₁)

T₁/(T₂ - T₁)

(T₁ - T₂)/T₁

(T₂ - T₁)/T₁

T₂/(T₂ - T₁)

T₁/(T₂ - T₁)

(T₁ - T₂)/T₁

(T₂ - T₁)/T₁

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Wet vapour

Saturated liquid

Superheated vapour

Dry saturated vapour

Wet vapour

Saturated liquid

Superheated vapour

Dry saturated vapour

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant

Decreases

None of these

Increases

Remains constant

Decreases

None of these

Increases

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Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Same

None of these

Higher

Lower

Same

None of these

Higher

Lower

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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning The material of pipe lines for a system using Freon as a refrigerant should be

Refrigeration and Air Conditioning The C.O.P. of a heat pump working on a reversed Carnot cycle is

Refrigeration and Air Conditioning In a vapour compression system, the condition of refrigerant before passing through the condenser is

Refrigeration and Air Conditioning The wet bulb temperature during sensible heating of air

Refrigeration and Air Conditioning The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.

Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Refrigeration and Air Conditioning
The C.O.P. of a Carnot refrigerator in winter will be _________ as compared to C.O.P. in summer.