162. For a given dry bulb temperature, as the relative humidity decreases, the wet bulb temperature will
A.Increase
B.Decrease
C.Be same
D.Increase/decrease depending on other factors
163. The difference between dry bulb and wet bulb temperature increases as
A.Air becomes wetter
B.Air becomes drier
C.Atmospheric temperature rises
D.Atmospheric temperature decreases
164. The ratio of kg of moisture actually contained per kg of dry air to the kg of moisture required to-saturate 1 kg of air at the same dry bulb temperature is known as
A.Humidity ratio
B.Relative humidity
C.Degree of saturation
D.Specific humidity
165. At 100% relative humidity, the temperatures?dry bulb, wet bulb, dew point and , saturation are
A.Equal
B.Different
C.Two equal, two different
D.Three equal, one different
166. Sensible heat is the heat needed to
A.Vaporise water into steam and vice versa
B.Change the temperature of a liquid or vapour
C.Convert water into steam and superheat it
D.Measure dew point temperature
167. Adiabatic saturation is the process of
A.Increasing humidity ratio without change in heat content
B.Keeping humidity ratio constant with change in dry bulb temperature -
C.Heating air without changing humidity ratio
D.Adding moisture at same wet bulb temperature
168. Air is dehumidified by
A.Heating
B.(c) above
C.Chemical absorption
D.(a) and
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