Which one of the following processes is responsible for the glittering of air bubble rising through water?

Diamonds are glittering and attractive because light incident on them undergoes

A

Highest refraction

B

Multiple internal reflections

C

Multiple surface reflections

D

Hundred percent transmission

For a given design of bubble cap, the number of bubble caps to be used per tray is set by the

A

Allowable gas velocity through the slots

B

Plate spacing

C

Diameter of the column

D

All of the above

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

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

Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

A

Cooling and dehumidification

B

Heating and dehumidification at almost constant wet bulb temperature

C

Dehumidification with dry bulb temperature remaining constant

D

None of these

Which of the following will increase in a rising parcel of air?

A

Saturation vapor pressure

B

Relative humidity

C

Mixing ratio

D

Air temperature

E

None of the above

Which of the following will decrease in a rising parcel of air?

A

Relative humidity

B

Absolute humidity

C

Specific humidity

D

All of the above

Logically, what does a continually rising air pressure indicate?

A

Advent of unsettled and cloudy weather

B

Advent of a cyclone

C

Fine and settled weather

D

Fine and unsettled weather

When a barometer is rising air pressure is

A

Increasing

B

Decreasing

C

Constant

D

Zero

Water flows into an empty 64-gallon drum through pipe A and flows out through pipe B. If the rate of flow through A is 2 gallons/hour, how many gallons per hour must flow out through pipe B so that the drum is full in exactly 96 hours?

A

3/8

B

1/2

C

2/3

D

4/3

Which one of the following processes is responsible for the glittering of air bubble rising through water?

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