#1
Which of the following is a commonly used refrigerant in HVAC systems?
R-22
ExplanationR-22 is a commonly used refrigerant in HVAC systems.
#2
What does HVAC stand for?
Heating, Ventilation, and Air Conditioning
ExplanationHVAC stands for Heating, Ventilation, and Air Conditioning.
#3
What is the purpose of the condenser coil in an HVAC system?
To release heat to the outside environment
ExplanationThe purpose of the condenser coil is to release heat to the outside environment in an HVAC system.
#4
What does SEER stand for in relation to HVAC systems?
Seasonal Energy Efficiency Ratio
ExplanationSEER stands for Seasonal Energy Efficiency Ratio in relation to HVAC systems.
#5
What is the purpose of the blower motor in an HVAC system?
To regulate airflow
ExplanationThe purpose of the blower motor is to regulate airflow in an HVAC system.
#6
Which of the following is a greenhouse gas and a commonly used refrigerant?
Ammonia (NH3)
ExplanationAmmonia (NH3) is both a greenhouse gas and a commonly used refrigerant.
#7
What is the main function of an evaporator coil in an HVAC system?
To absorb heat from the air
ExplanationThe main function of an evaporator coil is to absorb heat from the air in an HVAC system.
#8
What is the typical operating pressure range for low-pressure refrigerants in HVAC systems?
Below 5 psi
ExplanationThe typical operating pressure range for low-pressure refrigerants in HVAC systems is below 5 psi.
#9
Which of the following is a characteristic of an ideal refrigerant?
Non-toxic and non-flammable
ExplanationAn ideal refrigerant is non-toxic and non-flammable.
#10
What is the primary purpose of a compressor in an HVAC system?
To maintain pressure difference between evaporator and condenser
ExplanationThe primary purpose of a compressor is to maintain the pressure difference between the evaporator and condenser.
#11
Which refrigerant has been widely adopted to replace R-22 due to its lower ozone depletion potential?
R-410A
ExplanationR-410A has been widely adopted to replace R-22 due to its lower ozone depletion potential.
#12
Which type of refrigerant has been phased out due to its high ozone depletion potential?
CFCs (Chlorofluorocarbons)
ExplanationCFCs (Chlorofluorocarbons) have been phased out due to their high ozone depletion potential.
#13
Which refrigerant has a lower global warming potential (GWP) compared to R-410A?
R-1234yf
ExplanationR-1234yf has a lower global warming potential (GWP) compared to R-410A.
#14
Which refrigerant has zero ozone depletion potential (ODP)?
R-32
ExplanationR-32 has zero ozone depletion potential (ODP).
#15
Which of the following is a non-azeotropic refrigerant blend?
R-404A
ExplanationR-404A is a non-azeotropic refrigerant blend.