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HVAC EXCELLENCE TEST 2026
QUESTIONS AND ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
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
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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
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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 ANSWERS | A+
GRADED | WITH EXPERT SOLUTIONS
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
, Page | 2
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
, Page | 3
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
