Heat Transfer, Refrigeration and Air Conditioning Questions

• When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
• The critical temperature is the temperature
• In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
• The expression is used for calculating relative humidity.
• In a vapour compression system, the condition of refrigerant before passing through the condenser is
• The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called
• A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called
• For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is
• Dry bulb temperature is the temperature of air recorded by a thermometer, when
• For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is
• The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as
• The average value of thermal conductivity for water at 20° C saturate is about 0.51.
• The heat of sun reaches to us according to
• Which of the following statement is wrong?
• Kirchhoff's law states that
• Film coefficient is defined as the ratio of
• The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
• In a reversed Brayton cycle, the heat is absorbed by the air during
• In mechanical refrigeration system, the refrigerant has the maximum temperature
• Moisture should be removed from refrigerants to avoid