192) A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

193) The atmospheric air at dry bulb temperature of 15 Degree Centigrade enters a heating coil maintained at 40 Degree Centigrade. The air leaves the heating coil at 25 Degree Centigrade. The by-pass factor of the heating coil is

194) The final relative humidity of the air during cooling and dehumidification is generally __________ than that of entering air.

195) The emissivity of a polished silver body is __________ as compared to black body.

196) In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.