HVAC EXCELLENCE TEST QUESTIONS AND
ANSWERS 100% SOLVED
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
The state of the refrigerant entering the condenser is ✔️✔️High Pressure/ Highly Superheated
Vapor
The Evaporator ✔️✔️Transfers heat from the refrigerated space to the refrigerant
The Evaporator ✔️✔️Transfers heat from the refrigerated space to the refrigerant
Which of the following is not a Thermodynamic Property of refrigerant ✔️✔️Flammability
The sequential order of steps in the vapor-compression process are: ✔️✔️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 ✔️✔️201 Degrees Faranheit
Fan Airflow pressures are usually measured in ✔️✔️Inches of water column
Zero Psia (pounds per square inch absolute) is ✔️✔️a pressure which cannot be further
reduced
Zero Psig (pounds per square inch gauge) ✔️✔️The same as atmospheric pressure
ANSWERS 100% SOLVED
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
The state of the refrigerant entering the condenser is ✔️✔️High Pressure/ Highly Superheated
Vapor
The Evaporator ✔️✔️Transfers heat from the refrigerated space to the refrigerant
The Evaporator ✔️✔️Transfers heat from the refrigerated space to the refrigerant
Which of the following is not a Thermodynamic Property of refrigerant ✔️✔️Flammability
The sequential order of steps in the vapor-compression process are: ✔️✔️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 ✔️✔️201 Degrees Faranheit
Fan Airflow pressures are usually measured in ✔️✔️Inches of water column
Zero Psia (pounds per square inch absolute) is ✔️✔️a pressure which cannot be further
reduced
Zero Psig (pounds per square inch gauge) ✔️✔️The same as atmospheric pressure
