Air Conditioning Certification Exam (Exam Code A-02) Questions & 100% Verified Answers | Latest Update | Already Graded A+

Heat which causes a change in temperature of a substance is called; : sensible heat. Heat which causes a change in state of a material without a change in temperature is called; : latent heat. Heat which is added to a vapor after the change of state occurs is called; : superheat. Heat can travel by; : conduction, convection, radiation. The movement of heat by way of fluid (or air) is called; : convection . The movement of heat by direct contact is called; 2 | P a g e : conduction . The standard unit for measuring the quantity of heat in a substance is; : the British Thermal Unit (Btu). A refrigerat gives up heat when; : it condenses. It is desirable for refrigerant in the suction line to be slightly superheated in order to; : insure liquid refrigerant does not enter the compressor. The state of refrigerant in the suction line should be; : low pressure/ low temperature. The state of the refrigerant entering the condenser is; : high pressure/ highly superheated liquid. The evaporator;