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181.

Which of the following refrigerant has the freezing point?

A.	Ammonia	B.	Carbondioxide
C.	Freon 11	D.	Freon 22

182.

In which section of a vapour compression system, the refrigerant is generally in the form of a wet vapour?

183.

In case the relative humidity of atmospheric air is 100% the rate of evaporation of water will be

184.

On a particular time of a day if dry bulb temperature is equal to the wet bulb temperature, then it can be safely concluded that

A.	Specific humidity of air was 0.010 kg per kg of dry air	B.	Dew point was less than 20?C
C.	Relative humidity of air was 100%	D.	Atmospheric air was free from moisture
E.	Rain had occurred one or two hours earlier

185.

If dry bulb temperature is 25?C and wet bulb temperature is 18?C, then which of the following temperatures could possibly represent dew point?

186.

During sensible of cooling of air

A.	Wet bulb temperature decreases and relative humidity increases	B.	Wet bulb temperatures increases and relative humidity decreases
C.	Both wet bulb temperatures as well as relative humidity increase	D.	Both wet bulb temperature as well as relative humidity decrease
E.	Both humidity ratio as well as relative humidity remain constant

187.

No liquid can exist as a liquid at

A.	0?C	B.	100?C
C.	Zero pressure	D.	Zero viscosity
E.	10,000 m height above the surface of earth

188.

During sensible heating of air

A.	Dry bulb temperature increases while enthalpy of moist air decreases	B.	Dry bulb temperature decreases while enthalpy of moist air increases
C.	Both dry bulb temperature as well as enthalpy decrease	D.	Both dry bulb temperature as well as enthalpy increase

189.

Reversed Carnot cycle assumes that all processes in the cycle are

A.	Non-flow only	B.	Steady flow only
C.	Non flow or steady flow	D.	Transient flow

190.

The difference between wet and dry bulb temperatures

A.	Increases at atmospheric temperature	B.	Increases as air gets wet
C.	Increases as air gets drier	D.	remains constant always
E.	None of the above