Make up water is required in a cooling tower to replace the water lost by

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

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

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

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

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 the tower and the cooled water leaving the tower

D

None of these

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

Make up water is supplied during cooling tower operation to compensate for water losses due to

A

Evaporation

B

Blowdown

C

Entrainment

D

All of the above

The correct combination of the following groups of sentences "The boy climbed up to the top of the tower. The tower was steep and tall. The boy was my younger brother. There was none other" would be --

A

The boy having climbed up to the top, steep tower was my younger brother

B

The boy who climbed up to the top, steep tower was my younger brother

C

The boy who climbed up to the tall tower all alone was my younger brother

D

The boy climbing the top, steep tower was my younger brother

A boy is standing at the top of the tower and another boy is at the ground at some distance from the foot of the tower, then the angle of elevation and depression between the boys when both look at a each other will be-

A

Equal

B

Angle of elevation will be greater

C

Cannot be predicted for relation

D

Angle of depression will be greater

Make up water is required in a cooling tower to replace the water lost by

Related Questions