Wet bulb temperature is the temperature of air recorded by a thermometer, when

A It is not affected by the moisture present in the air
B Its bulb is surrounded by a wet cloth exposed to the air
C The moisture present in it begins to condense
D None of the above

Correct Answer: Its bulb is surrounded by a wet cloth exposed to the air

Wet-bulb temperature. The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked cloth (wet-bulb thermometer) over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature (dry-bulb temperature) and it is lower at lower humidity.
Bissoy MCQ
#Mechanical Engineering #Refrigeration and Air Conditioning

Related Questions

The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
A 0
B 100
C 50
D None of these
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called
A Wet bulb temperature
B Dry bulb temperature
C Dew point temperature
D None of these
Dry bulb temperature is the temperature of air recorded by a thermometer, when
A It is not affected by the moisture present in the air
B Its bulb is surrounded by a wet cloth exposed to the air
C The moisture present in it begins to condense
D None of the above
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a
A Large area but small mass
B High thermal conductivity
C Small specific heat
D All of the above
The difference between dry bulb temperature and wet bulb temperature, is called
A Dry bulb depression
B Wet bulb depression
C Dew point depression
D Degree of saturation
Dry bulb temperature of the gas is __________ the wet bulb temperature.
A Less than
B More than
C Equal to
D None of these
The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called
A Wet bulb temperature
B Dry bulb temperature
C Dew point temperature
D None of these
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
A Making the volume of thermometer bulb as large as conveniently possible
B Reducing the volume of the capillary to a minimum
C Reducing the volume of the receiving element to a minimum
D All of the above
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will
A decrease
B increase
C remain same
D heater will burn out
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.
A 100
B 50
C 78
D None of these

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