173) The rato of energy transferred by convection to that by conduction is called

174) A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of

175) Wet bulb temperature indicates the moisture content in air.

176) A designer chooses the values of fluid flow rates and specific heats in such a manner that the heat capacities of the two fluids are equal. A hot fluid enters the counter flow heat exchanger at 100 Degree Centigrade and leaves at 60 Degree Centigrade. A co

177) The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.