Related Questions

The natural convection air cooled condensers are used in
A Domestic refrigerators
B Water coolers
C Room air conditioners
D All of these
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
A 3, 3, 1, 7
B 3, 2, 1, none
C 3, 2, 1, 7
D 3, 3, 2, none
E All of the above
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.
A Equal to
B Less than
C Greater than
D None of these
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
A Cooled and humidified
B Cooled and dehumidified
C Heated and humidified
D Heated and dehumidified
The temperature of water cooled in cooling tower is always __________ temperature of entering air.
A More than the wet bulb
B Less than the wet bulb
C Equal to the wet bulb
D Equal to the dry bulb
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
A Ambient
B Dry bulb
C Dew point
D Wet bulb
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
A Wet bulb
B Dry bulb
C Saturation
D Dew point
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
A With greater number of blades
B Of increased diameter
C Both A & B
D Neither A nor B
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be
A High, of the order of 25°
B As low as possible (3 to 11°C)
C Zero
D Any value
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
A Cooled and dehumified
B Heated and humidified
C Cooled and humidified
D Heated and dehumidified

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