#1
Which refrigerant is commonly used in modern air conditioning systems?
R-22
R-134a
R-410A
Ammonia (NH3)
#2
Which component of a refrigeration system is responsible for rejecting heat to the surroundings?
Evaporator
Condenser
Compressor
Expansion valve
#3
In a vapor compression refrigeration cycle, which component functions as a heat exchanger where heat is rejected?
Evaporator
Condenser
Compressor
Expansion valve
#4
What is the main purpose of the evaporator coil in an air conditioning system?
To reject heat
To compress the refrigerant
To absorb heat from the indoor air
To regulate the flow of refrigerant
#5
What is the role of the compressor in a refrigeration system?
To regulate the flow of refrigerant
To increase the pressure of the refrigerant
To absorb heat from the surroundings
To control the temperature of the refrigerant
#6
What does the term 'COP' stand for in the context of refrigeration systems?
Cooling Operating Parameter
Coefficient of Power
Coefficient of Performance
Cooling Output Pressure
#7
What is the function of an expansion valve in a refrigeration cycle?
To increase the pressure of the refrigerant
To regulate the flow of refrigerant into the evaporator
To cool down the refrigerant
To increase the efficiency of the compressor
#8
What is the ideal gas law equation used in refrigeration and air conditioning?
PV = nRT
PV = RT
PV = nT
PV = R/T
#9
Which refrigerant has zero ozone depletion potential (ODP)?
#10
What is the purpose of the accumulator in a refrigeration system?
To store excess refrigerant
To regulate the flow of refrigerant
To increase the pressure of the refrigerant
To cool down the refrigerant
#11
What is the purpose of a desiccant in an air conditioning system?
To cool down the air
To dehumidify the air
To increase the pressure of the refrigerant
To lubricate the compressor
#12
What is the role of the superheat in a refrigeration cycle?
To ensure complete vaporization of the refrigerant
To cool down the refrigerant
To increase the pressure of the refrigerant
To absorb heat from the surroundings
#13
Which refrigerant has the highest Global Warming Potential (GWP)?
#14
What is the function of a reversing valve in a heat pump system?
To control the flow of refrigerant
To regulate the compressor speed
To switch between heating and cooling modes
To adjust the temperature setpoint
#15
Which of the following is a refrigerant used in cascade refrigeration systems?
R-22
R-134a
R-404A
Ammonia (NH3)