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HVAC EXCELLENCE TEST 2026
QUESTIONS AND CORRECT ANSWERS
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
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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
HVAC EXCELLENCE TEST 2026
QUESTIONS AND CORRECT ANSWERS
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
, 2 |Page
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
