Applied Thermodynamics (3161910) MCQs

MCQs of Psychrometry

Showing 1 to 10 out of 60 Questions
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1.
The science of study of the thermodynamic properties of a mixture of dry air and water vapour in the atmosphere is called
(a) Refrigeration
(b) Psychrometry
(c) Air conditioning
(d) None of the above
Answer:

Option (b)

2.
The specific humidity is the mass of water vapour present in
(a) one cubic meter of wet air
(b) one cubic meter of dry air
(c) one kg of wet air
(d) one kg of dry air
Answer:

Option (d)

3.
The difference between dry bulb temperature and dew point temperature is called
(a) dry bulb depression
(b) wet bulb depression
(c) dew point depression
(d) degree of saturation
Answer:

Option (c)

4.
The sling psychrometer is used to measure
(a) dry bulb temperature only
(b) wet bulb temperature only
(c) specific humidity
(d) both A and B
Answer:

Option (d)

5.
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure is called
(a) humidity ratio
(b) relative humidity
(c) absolute humidity
(d) degree of saturation
Answer:

Option (b)

6.
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)

7.
The wet bulb temperature at 100% relative humidity is __________ dew point temperature.
(a) same as
(b) lower than
(c) higher than
(d) may lower or higher
Answer:

Option (a)

8.
Which of the following statement is correct?
(a) The constant enthalpy lines are also constant wet bulb temperature lines
(b) The wet bulb and dry bulb temperature are equal at saturation condition
(c) The wet-bulb temperature is a measure of enthalpy of moist air
(d) All of the above
Answer:

Option (d)

9.
The specific humidity during heating and humidification process
(a) remains constant
(b) increases
(c) decreases
(d) remains constant
Answer:

Option (b)

10.
The minimum temperature to which water can be cooled in a cooling tower is
(a) dew point temperature of air
(b) wet bulb temperature of air
(c) dry bulb temperature of air
(d) ambient air temperature
Answer:

Option (b)

Showing 1 to 10 out of 60 Questions
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