13) In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively

14) As relative humidity decreases, the dew point temperature will be __________ wet bulb temperature.

15) The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.

16) The optimum effective temperature for human comfort is

17) The wet bulb temperature lines, on the psychrometric chart, are curved lines.