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GATE 2023 || Refrigeration & Air Conditioning || Quiz 37
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Question 1
A rigid container of volume 0.5 m3 contains 1.0 kg of water at 120 °C (vf = 0.00106 m3/kg. vg = 0.8908 m3/kg). The state of water is
Question 2
A moist air sample has dry bulb temperature of 30 ºC and specific humidity of 11.5 g water vapour per kg dry air. Assume molecular weight of air as 28.93. If the saturation vapour pressure of water at 30 ºC is 4.24 kPa and the total pressure is 90 kPa, then the relative humidity (in %) of air sample is ______.
Question 3
Air at 30 °C and 1 bar has a specific humidity of 0.016 kg/kg of dry air. By considering the saturation pressure of water vapour at 30 °C as 4.246 kPa, the relative humidity of the air will be
Question 4
The specific humidity of moist air is 0.0107 kg/kg of dry air . The total atmospheric pressure is 98.75 kPa. The saturation temperature (in °C) is______.(use linear interpolation if needed)
Question 5
Air in a room is at 35 °C and 60% relative humidity (RH) The pressure in the room is 0.1 MPa The saturation pressure of water at 35 °C is 5.63 kPa. The humidity ratio of the air (in grain/kg of dry air) is ________.
Question 6
Ambient air is at a pressure of 100 kPa, dry bulb temperature of 30oC and 60% relative humidity. The saturation pressure of water at 30oC is 4.24 kPa. The specific humidity of air (in g/kg of dry air) is __________ (correct to two decimal places).
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