#1
Which refrigerant is commonly used in residential air conditioning systems?
R410A
ExplanationR410A is a common refrigerant used in residential AC systems.
#2
What is the purpose of an evaporator coil in an air conditioning system?
To absorb heat from indoor air
ExplanationThe evaporator coil's purpose is to absorb heat from indoor air in an AC system.
#3
In HVAC design, what is the role of a psychrometric chart?
To study the properties of moist air
ExplanationA psychrometric chart is used in HVAC design to study the properties of moist air.
#4
Which HVAC system is known for its zoning capabilities, allowing different areas to have individual temperature control?
Variable Refrigerant Flow (VRF) system
ExplanationVariable Refrigerant Flow (VRF) systems allow zoning for individual temperature control in different areas.
#5
What is the purpose of a thermostatic expansion valve (TXV) in an HVAC system?
To control the flow of refrigerant into the evaporator coil
ExplanationThe purpose of a thermostatic expansion valve (TXV) is to control the flow of refrigerant into the evaporator coil in an HVAC system.
#6
What does HVACR stand for?
Heating, Ventilation, and Air Conditioning Regulation
ExplanationHVACR stands for Heating, Ventilation, and Air Conditioning Regulation.
#7
Which professional association is known for setting standards in the HVACR industry?
ASHRAE
ExplanationASHRAE is a professional association setting standards in the HVACR industry.
#8
Which HVAC system is most commonly used in large commercial buildings and skyscrapers?
Packaged rooftop unit
ExplanationPackaged rooftop units are commonly used in large commercial buildings and skyscrapers as HVAC systems.
#9
What does SEER stand for in the context of air conditioning systems?
Seasonal Energy Efficiency Ratio
ExplanationSEER stands for Seasonal Energy Efficiency Ratio in the context of air conditioning systems.
#10
Which HVAC component is responsible for distributing conditioned air throughout a building?
Air handler
ExplanationAn air handler is responsible for distributing conditioned air throughout a building in an HVAC system.
#11
What is the purpose of a damper in an HVAC system?
To regulate airflow
ExplanationA damper's purpose in an HVAC system is to regulate airflow.
#12
What is the primary purpose of a condensate drain line in an HVAC system?
To drain condensed water from the evaporator coil
ExplanationThe primary purpose of a condensate drain line is to drain condensed water from the evaporator coil in an HVAC system.
#13
What is the primary function of a heat pump in HVAC systems?
To extract heat from indoor air and transfer it outside
ExplanationA heat pump's primary function is to extract indoor heat and transfer it outside in HVAC systems.
#14
Which refrigerant is classified as a hydrochlorofluorocarbon (HCFC)?
R22
ExplanationR22 is classified as a hydrochlorofluorocarbon (HCFC) refrigerant.
#15
Which refrigerant is commonly used in automotive air conditioning systems?
R1234yf
ExplanationR1234yf is commonly used in automotive air conditioning systems as a refrigerant.
#16
What is the purpose of a desiccant wheel in an HVAC system?
To absorb moisture from the air
ExplanationThe desiccant wheel's purpose is to absorb moisture from the air in an HVAC system.
#17
Which refrigerant is known for its low global warming potential (GWP)?
R1234ze
ExplanationR1234ze is known for its low global warming potential (GWP) as a refrigerant.
#18
What is the primary function of a compressor in an air conditioning system?
To circulate refrigerant
ExplanationThe primary function of a compressor in an air conditioning system is to circulate refrigerant.
#19
In HVAC systems, what does the term 'Economizer' refer to?
A device to minimize energy consumption
ExplanationAn economizer in HVAC systems refers to a device that minimizes energy consumption.