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Mechanical Engineering

A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
[A].

heat dissipated to the surroundings

[B].

heat stored in the human body

[C].

sum of (a) and (b)

[D].

difference of (a) and (b)

Answer: Option C

Explanation:

No answer description available for this question.

A human body feels comfortable when the heat produced by the metabolism of human body is equal to the Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be
[A].

dehumidification

[B].

cooling and humidification

[C].

cooling and dehumidification

[D].

dehumidification and pure sensible cooling

Answer: Option C

Explanation:

No answer description available for this question.

It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
[A].

which lies between the dry bulb and wet bulb temperatures of the incoming stream

[B].

which lies between the wet bulb and dew point temperatures of the incoming stream

[C].

which is lower than the dew point temperature of the incoming stream

[D].

of adiabatic saturation of incoming stream

Answer: Option C

Explanation:

No answer description available for this question.

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is
[A].

heated and dehumidified

[B].

heated and humidified

[C].

cooled and humidified

[D].

cooled and dehumidified

Answer: Option B

Explanation:

No answer description available for this question.

In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

In chemical dehumidification process,

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: In chemical dehumidification process,
[A].

dew point temperature decreases

[B].

wet bulb temperature decreases

[C].

dry bulb temperature increases

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

In chemical dehumidification process, Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

During adiabatic saturation process on unsaturated air __________ remains constant.

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: During adiabatic saturation process on unsaturated air __________ remains constant.
[A].

relative humidity

[B].

dew point temperature

[C].

dry bulb temperature

[D].

wet bulb temperature

Answer: Option D

Explanation:

No answer description available for this question.

During adiabatic saturation process on unsaturated air __________ remains constant. Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

During heating and humidification, the final relative humidity of air

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: During heating and humidification, the final relative humidity of air
[A].

is higher than that of the entering air

[B].

is lower than that of the entering air

[C].

can be lower or higher than that of the entering air

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

During heating and humidification, the final relative humidity of air Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

During heating and dehumidification process, dry bulb temperature

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: During heating and dehumidification process, dry bulb temperature
[A].

remains constant

[B].

increases

[C].

decreases

Answer: Option B

Explanation:

No answer description available for this question.

During heating and dehumidification process, dry bulb temperature Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning