HVAC EXCELLENCE TEST 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
Heat which causes a change in temperature of a substance is called - (answer)sensible heat,
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this
process la called? - (answer)latent heat
Heat added to the refrigerant in vapor state after the evaporation process is called, - (answer)superheat
A scroll compressor moves refrigerant by means of; - (answer)involute spirals
The movement of heat by way of fluid or is called; air - (answer)convection
The movement of heat through a solid object is called; - (answer)radiation
The standard unit for measuring the quantity of heat in a substance is - (answer)British Thermal Unit
A refrigerant gives up heat when it; - (answer)it condenses
Why must refrigerant in the suction line be slightly warmer than the saturation temperature? -
(answer)prevent liquid slugging of the compressor.
It is desirable for refrigerant in the suction line to be slightly superheated in order to; - (answer)insure
liquid refrigerant does not enter the compressor.,
The state of the refrigerant in the suction line should be - (answer)low pressure/ low temperature vapor
The state of the refrigerant entering the condenser is - (answer)High Pressure/ Highly Superheated
Vapor
The Evaporator - (answer)Transfers heat from the refrigerated space to the refrigerant
, HVAC EXCELLENCE TEST 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
The Evaporator - (answer)Transfers heat from the refrigerated space to the refrigerant
Which of the following is not a Thermodynamic Property of refrigerant - (answer)Flammability
The sequential order of steps in the vapor-compression process are: - (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 - (answer)201 Degrees Faranheit
Fan Airflow pressures are usually measured in - (answer)Inches of water column
Zero Psia (pounds per square inch absolute) is - (answer)a pressure which cannot be further reduced
Zero Psig (pounds per square inch gauge) - (answer)The same as atmospheric pressure
The Temperature at which moisture will start to condense from the air is called - (answer)Dew Point
Temperature
A Compound pressure gauge measures - (answer)Pressure and Vacuum
A Mechanical shaft seal is necesssary on a - (answer)Open drive compressor
Liquid slugging is - (answer)Liquid refrigerant in the compressor clearance space
The Clearance space in a reciprocating compressor - (answer)has an effect on compressor capacity
SOLUTIONS
Heat which causes a change in temperature of a substance is called - (answer)sensible heat,
Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this
process la called? - (answer)latent heat
Heat added to the refrigerant in vapor state after the evaporation process is called, - (answer)superheat
A scroll compressor moves refrigerant by means of; - (answer)involute spirals
The movement of heat by way of fluid or is called; air - (answer)convection
The movement of heat through a solid object is called; - (answer)radiation
The standard unit for measuring the quantity of heat in a substance is - (answer)British Thermal Unit
A refrigerant gives up heat when it; - (answer)it condenses
Why must refrigerant in the suction line be slightly warmer than the saturation temperature? -
(answer)prevent liquid slugging of the compressor.
It is desirable for refrigerant in the suction line to be slightly superheated in order to; - (answer)insure
liquid refrigerant does not enter the compressor.,
The state of the refrigerant in the suction line should be - (answer)low pressure/ low temperature vapor
The state of the refrigerant entering the condenser is - (answer)High Pressure/ Highly Superheated
Vapor
The Evaporator - (answer)Transfers heat from the refrigerated space to the refrigerant
, HVAC EXCELLENCE TEST 2026 QUESTIONS AND ANSWERS | A+ GRADED | WITH EXPERT
SOLUTIONS
The Evaporator - (answer)Transfers heat from the refrigerated space to the refrigerant
Which of the following is not a Thermodynamic Property of refrigerant - (answer)Flammability
The sequential order of steps in the vapor-compression process are: - (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 - (answer)201 Degrees Faranheit
Fan Airflow pressures are usually measured in - (answer)Inches of water column
Zero Psia (pounds per square inch absolute) is - (answer)a pressure which cannot be further reduced
Zero Psig (pounds per square inch gauge) - (answer)The same as atmospheric pressure
The Temperature at which moisture will start to condense from the air is called - (answer)Dew Point
Temperature
A Compound pressure gauge measures - (answer)Pressure and Vacuum
A Mechanical shaft seal is necesssary on a - (answer)Open drive compressor
Liquid slugging is - (answer)Liquid refrigerant in the compressor clearance space
The Clearance space in a reciprocating compressor - (answer)has an effect on compressor capacity
