Engineering :: Refrigeration and Air conditioning

@ : Home > Mechanical Engineering > Refrigeration and Air conditioning

191.

Sometimes refrigeration plants use cooling towers. The water cooled in those towers is supplied

A.	For defrosting evaporator coils	B.	To cool compressor cylinder only
C.	To cool refrigerant in evaporator	D.	To cool refrigerant in condenser
E.	None of the above

192.

During air conditioning whenever two or more streams of moist air are mixed they follow

A.	Adiabatic process	B.	Isothermal process
C.	Polytropic process	D.	Constant pressure process
E.	Polytropic process

193.

For a sensible heating the air is passed over a heating coil which may be

A.	Heated by electric resistance	B.	Heated by passing hot water through the coil
C.	Heated by passing steam through the coil	D.	Heated by direct solar radiations
E.	Heated by any of the above methods

194.

When moisture is removed from air at constant dry bulb temperature the process is known as

A.	Aeration	B.	Deionisation
C.	Dehumidification	D.	Drying
E.	Sensible cooling

195.

When moisture is added to air at constant dry bulb temperature, the process is known as

A.	Humidification	B.	Sensible cooling
C.	Wetting	D.	Chilling
E.	None of the above

196.

In case air is cooled by a process in which the humidity ratio of air does not change, the process is known as

A.	Humidification	B.	Dehumidification
C.	Ventilation	D.	Chilling
E.	Sensible cooling

197.

Which of the following are synonyms?

A.	Humidity ratio and specific humidity	B.	Degree of saturation and degree of reaction
C.	Sensible cooling and dehumidification	D.	Relative humidity and specific humidity
E.	Dehumidification

198.

The ratio of mass of water vapour associated with unit mass of dry air to the mass of water vapour associated with unit mass of dry air saturated at the same temperature is known as

A.	Relative humidity	B.	Specific humidity decreases
C.	Humidity ratio	D.	Degree of saturation
E.	None of the above

199.

The condension of moisture contained in air will take place at

A.	Dry bulb temperature	B.	Wet bulb temperature
C.	Any where between dry bulb temperature and wet bulb temperature	D.	Saturation temperature
E.	Dew point temperature

200.

The ratio of sensible heat to total heat is known as

A.	Dew point	B.	Humidification ratio
C.	Relative humidity	D.	Specific humidity
E.	Sensible heat factor