HVAC EXCELLENCE 102 QUESTIONS AND ANSWERS

Heat which causes a change in temperature of a substance is called - ️️sensible heat, Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this process la called? - ️️latent heat Heat added to the refrigerant in vapor state after the evaporation process is called, - ️️superheat A scroll compressor moves refrigerant by means of; - ️️involute spirals The movement of heat by way of fluid or is called; air - ️️convection The movement of heat through a solid object is called; - ️️radiation The standard unit for measuring the quantity of heat in a substance is - ️️British Thermal Unit A refrigerant gives up heat when it; - ️️it condenses Why must refrigerant in the suction line be slightly warmer than the saturation temperature? - ️️prevent liquid slugging of the compressor. 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 the refrigerant in the suction line should be - ️️low pressure/ low temperature vapor