Evaporative cooling process employs a combination of cooling and humidification in which the

The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil and h_A = Enthalpy of air at the end of humidification process)

A

$$\frac{{{{\text{h}}_{\text{A}}} - {{\text{h}}_2}}}{{{{\text{h}}_1} - {{\text{h}}_2}}}$$

B

$$\frac{{{{\text{h}}_2} - {{\text{h}}_{\text{A}}}}}{{{{\text{h}}_1} - {{\text{h}}_2}}}$$

C

$$\frac{{{{\text{h}}_1} - {{\text{h}}_2}}}{{{{\text{h}}_{\text{A}}} - {{\text{h}}_2}}}$$

D

$$\frac{{{{\text{h}}_{\text{A}}} - {{\text{h}}_1}}}{{{{\text{h}}_2} - {{\text{h}}_1}}}$$

What is the main difference between simple air cooling system and simple air evaporative cooling system?

A

Simple air evaporative cooling system has an evaporator

B

Simple air evaporative cooling system has two evaporators

C

Simple air evaporative cooling system has an extra compressor

D

Simple air evaporative cooling system has three evaporators

What is the difference between Boot-strap air cooling system and Boot-strap evaporative cooling system?

A

Boot strap evaporative system has an evaporator

B

Boot strap evaporative system has two evaporators

C

Boot-strap evaporator eliminates the need for evaporator

D

Boot-strap evaporator system has three evaporators

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 tower uses the phenomenon of evaporative cooling to cool warm water above the dbt of air.

A

true

B

false

If cooling of 45 minutes or less is required, it may be advantageous to use evaporative cooling system.

A

True

B

False

Q.(1-4): Answer the questions on the basis of the information given below. * F,G and H are insurance companies , Q,R,S and T are private detectives .Each detective works for at least one of the insurance companies. * Q always works for F and at least one of the other companies. Some of the time G employs only one of these detectives,' the rest of the time it employs exactly two of them. *F and H each employ exactly two of these detectives all the time. If R works for H only, and if S works for G and H only, T works for--

A

F only

B

G only

C

H only

D

both F and G

Which of the following remains constant during evaporative cooling process with recirculated water supply?

A

Relative humidity

B

Partial pressure of vapour

C

Wet bulb temperature

D

None of these

Which of the following increases during evaporative cooling process with recirculated water supply?

A

Wet bulb temperature

B

Relative humidity

C

Partial pressure of vapour

D

Both B and C

Which of the following decreases during evaporative cooling process with recirculated water supply?

A

Wet bulb temperature

B

Relative humidity

C

Partial pressure of vapour

D

None of these

Evaporative cooling process employs a combination of cooling and humidification in which the

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