Air Conditioning Certification Exam (Exam Code A-02)100% Updated!

Heat which causes a change in temperature of a substance is called; - ANSWERsensible heat. Heat which causes a change in state of a material without a change in temperature is called; - ANSWERlatent heat. Heat which is added to a vapor after the change of state occurs is called; - ANSWERsuperheat. Heat can travel by; - ANSWERconduction, convection, radiation. The movement of heat by way of fluid (or air) is called; - ANSWERconvection . The movement of heat by direct contact is called; - ANSWERconduction . The standard unit for measuring the quantity of heat in a substance is; - ANSWERthe British Thermal Unit (Btu). A refrigerat gives up heat when; - ANSWERit condenses. It is desirable for refrigerant in the suction line to be slightly superheated in order to; - ANSWERinsure liquid refrigerant does not enter the compressor. The state of refrigerant in the suction line should be; - ANSWERlow pressure/ low temperature. The state of the refrigerant entering the condenser is; - ANSWERhigh pressure/ highly superheated liquid. The evaporator; - ANSWERTransfers heat from the refrigerant to the ambient air. Which of the following is NOT a thermodynamic property of refrigerants? a) Critical point. b) Saturation point.