#1
What is the function of an expansion valve in an air conditioning system?
To control the flow of refrigerant into the evaporator
ExplanationThe expansion valve regulates refrigerant flow into the evaporator, controlling the cooling process.
#2
Which of the following statements about HVAC systems is true?
HVAC stands for Heat, Ventilation, and Air Conditioning
ExplanationHVAC stands for Heat, Ventilation, and Air Conditioning.
#3
What is the function of a compressor in an air conditioning system?
To remove heat from the refrigerant
ExplanationThe compressor removes heat from the refrigerant, facilitating the cooling process.
#4
In an HVAC system, what does the term 'ventilation' refer to?
The process of removing or exchanging air to control indoor air quality
ExplanationVentilation involves managing indoor air quality by exchanging or removing air.
#5
Which of the following refrigerants has the lowest global warming potential (GWP)?
R-1234yf
ExplanationR-1234yf has the lowest GWP among the listed refrigerants.
#6
What is a split air conditioning system?
A system where the indoor and outdoor units are separate
ExplanationA split AC has separate indoor and outdoor units for more flexible installation.
#7
Which of the following is NOT a type of air conditioning system?
Hydraulic cooling
ExplanationHydraulic cooling is not a recognized type of air conditioning system.
#8
What does SEER stand for in relation to air conditioning systems?
Seasonal Energy Efficiency Ratio
ExplanationSEER stands for Seasonal Energy Efficiency Ratio, measuring AC system efficiency.
#9
What is the purpose of a desiccant in a dehumidification process?
To remove moisture from the air
ExplanationA desiccant is used to extract moisture from the air during dehumidification.