The term "cooling range" in a cooling tower refers to the difference in the temperature of

The term "approach" in a cooling tower refers to the difference in the temperature of the

A

Cold water leaving the tower and the wet bulb temperature of the surrounding air

B

Hot water entering the tower and the wet bulb temperature of the surrounding air

C

Hot water entering and the cooled water leaving the cooling tower

D

None of these

In actual operation of a bubble cap distillation tower, the __________ at the bottom of the tower is more than that at the top of the tower.

A

Molal flow rate of vapour

B

Vapour molecular weight

C

Pressure and temperature

D

All of the above

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

A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

A

10-15

B

30-40

C

70-80

D

90-100

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

The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

A

Condenser efficiency

B

Vacuum efficiency

C

Nozzle efficiency

D

Boiler efficiency

The cooling effect in a cooling tower can not be increased by

A

Increasing the air velocity over the wet surfaces

B

Reducing the humidity of entering air

C

Lowering the barometric pressure

D

None of these

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

The cooling effect in a cooling tower can be speeded up by

A

Increasing the air velocity and area of exposed wet surface

B

Reducing the barometric pressure

C

Reducing the humidity of the air

D

All of the above

The term "cooling range" in a cooling tower refers to the difference in the temperature of

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