#1
Which refrigeration expansion device controls the flow of refrigerant by varying the size of an orifice?
Thermostatic Expansion Valve (TXV)
Capillary Tube
Float Valve
Automatic Expansion Valve (AEV)
#2
What is the function of an expansion valve in a refrigeration system?
To increase the pressure of the refrigerant
To decrease the pressure of the refrigerant
To regulate the compressor speed
To control the evaporator temperature
#3
What is the purpose of a solenoid valve in a refrigeration system?
To regulate the flow of refrigerant to the condenser
To control the flow of refrigerant to the evaporator
To regulate the flow of oil to the compressor
To adjust the temperature of the refrigerant
#4
Which of the following is NOT a type of expansion valve?
Thermostatic Expansion Valve (TXV)
Capillary Tube
Float Valve
Pressure Relief Valve
#5
What is the main purpose of an accumulator in a refrigeration system?
To store excess refrigerant during low load conditions
To regulate the flow of refrigerant to the compressor
To maintain a constant evaporator temperature
To remove moisture from the refrigerant
#6
Which of the following is a common type of refrigeration expansion device used in household refrigerators?
Thermostatic Expansion Valve (TXV)
Capillary Tube
Float Valve
Automatic Expansion Valve (AEV)
#7
What is superheat in a refrigeration system?
The difference between the refrigerant temperature and the evaporator temperature
The temperature at which refrigerant changes from liquid to vapor
The additional heat absorbed by the refrigerant vapor after it has completely evaporated
The amount of heat required to change refrigerant from liquid to vapor
#8
What is the primary function of a thermostatic expansion valve (TXV) in a refrigeration system?
To maintain a constant evaporator pressure
To control the flow of refrigerant into the evaporator
To regulate the condenser temperature
To prevent compressor overheating
#9
What role does a receiver play in a refrigeration system?
To store excess refrigerant during low load conditions
To regulate the flow of refrigerant to the compressor
To control the flow of refrigerant to the evaporator
To increase the pressure of the refrigerant before it enters the condenser
#10
What is the function of a sight glass in a refrigeration system?
To monitor the refrigerant level in the condenser
To indicate the temperature of the refrigerant
To detect leaks in the refrigeration circuit
To observe the flow of refrigerant through the system
#11
Which type of refrigeration expansion device maintains a constant superheat at the evaporator outlet?
Thermostatic Expansion Valve (TXV)
Capillary Tube
Float Valve
Automatic Expansion Valve (AEV)
#12
In a refrigeration system, what does the term 'subcooling' refer to?
The additional heat absorbed by the refrigerant vapor after it has completely evaporated
The temperature at which refrigerant changes from liquid to vapor
The difference between the refrigerant temperature and the condenser temperature
The amount of heat removed from the refrigerant liquid after it has completely condensed
#13
In a refrigeration cycle, what is the purpose of the evaporator?
To remove heat from the refrigerant
To increase the pressure of the refrigerant
To store excess refrigerant during low load conditions
To control the flow of refrigerant to the condenser
#14
In a refrigeration system, what is the purpose of a crankcase heater?
To regulate the flow of refrigerant to the compressor
To heat the compressor oil and prevent it from thickening
To maintain a constant evaporator temperature
To control the flow of refrigerant to the condenser
#15
In a refrigeration system, what does the term 'flash gas' refer to?
The rapid expansion of liquid refrigerant in the evaporator
The vaporization of refrigerant before it enters the compressor
The sudden increase in pressure in the condenser
The conversion of refrigerant from vapor to liquid