169. When air is adiabatically saturated, the temperature attained is known as
A.Dry bulb temperature
B.Wet bulb temperature
C.Dew point temperature
D.Critical temperature

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170. Dehydration is a form of dehumidifying process
A.Without the removal of heat at the same time
B.With removal of heat at the same time
C.Converting latent heat of entering air into sensible heat in the leaving air
D.(a) and (c) above

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171. When a mixture of air and water vapour is cooled at constant pressure upto saturation temperature of water vapour, the temperature attained is known as
A.Dry bulb temperature
B.Wet bulb temperature
C.Dew point temperawre
D.Critical temperature

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172. For completely dry air, total heat is
A.Sum of latent heat and sensible heat
B.Same as sensible heat
C.Same as latent heat
D.More than sensible heat

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173. Psychrometric chart
A.Is seldom used for air conditioning design
B.Provides plots for moist air conditions
C.Enables to determine wet bulb, and dew point temperature
D.Is a chart for conversion of British system into metric.system

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174. On psychrometric chart, dry bulb temperature lines are
A.Horizontal
B.Vertical
C.Straight inclined sloping downward to the right
D.Curved

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175. Central air conditioning system is normally employed where refrigeration and air conditioned air requirements respectively are more than
A.1 ton and 500 m3/min.
B.10 tons and 1000 m3/min.
C.25 tons_and 2500 m3/min.
D.50 tons and 5000 m3/min

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