HVAC EXCELLENCE EXAM QUESTIONS AND ANSWERS 100% PASS

HVAC EXCELLENCE EXAM QUESTIONS AND ANSWERS 100% PASS Heat which causes a change in temperature of a substance is called - Correct Answer ️️ -sensible heat, Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this process la called? - Correct Answer ️️ -latent heat Heat added to the refrigerant in vapor state after the evaporation process is called, - Correct Answer ️️ -superheat A scroll compressor moves refrigerant by means of; - Correct Answer ️️ -involute spirals The movement of heat by way of fluid or is called; air - Correct Answer ️️ -convection The movement of heat through a solid object is called; - Correct Answer ️️ -radiation The standard unit for measuring the quantity of heat in a substance is - Correct Answer ️️ -British Thermal Unit A refrigerant gives up heat when it; - Correct Answer ️️ -it condenses Why must refrigerant in the suction line be slightly warmer than the saturation temperature? - Correct Answer ️️ -prevent liquid slugging of the compressor. It is desirable for refrigerant in the suction line to be slightly superheated in order to; - Correct Answer ️️ -insure liquid refrigerant does not enter the compressor., The state of the refrigerant in the suction line should be - Correct Answer ️️ -low pressure/ low temperature vapor The state of the refrigerant entering the condenser is - Correct Answer ️️ -High Pressure/ Highly Superheated Vapor The Evaporator - Correct Answer ️️ -Transfers heat from the refrigerated space to the refrigerant The Evaporator - Correct Answer ️️ -Transfers heat from the refrigerated space to the refrigerant Which of the following is not a Thermodynamic Property of refrigerant - Correct Answer ️️ -Flammability The sequential order of steps in the vapor-compression process are: - Correct Answer ️️ -Compression, Condensation, Expansion, Vaporization If a 30 lb container of $-410A refrigerant has been stored over night at 70 degrees F, the pressure in the cylinder should be approximately - Correct Answer ️️ -201 Degrees Faranheit Fan Airflow pressures are usually measured in - Correct Answer ️️ -Inches of water column Zero Psia (pounds per square inch absolute) is - Correct Answer ️️ -a pressure which cannot be further reduced Zero Psig (pounds per square inch gauge) - Correct Answer ️️ -The same as atmospheric pressure The Temperature at which moisture will start to condense from the air is called - Correct Answer ️️ -Dew Point Temperature A Compound pressure gauge measures - Correct Answer ️️ -Pressure and Vacuum A Mechanical shaft seal is necesssary on a - Correct Answer ️️ -Open drive compressor Liquid slugging is - Correct Answer ️️ -Liquid refrigerant in the compressor clearance space The Clearance space in a reciprocating compressor - Correct Answer ️️ -has an effect on compressor capacity Which of the following types of air conditioning compressors is more efficient - Correct Answer ️️ -Centrifugal Which of the following represnet the right order for the functionsof a condenser - Cor