#1
Which refrigeration expansion device controls the flow of refrigerant by varying the size of an orifice?
Thermostatic Expansion Valve (TXV)
ExplanationRegulates refrigerant flow by adjusting orifice size.
#2
What is the function of an expansion valve in a refrigeration system?
To decrease the pressure of the refrigerant
ExplanationReduces refrigerant pressure for efficient system operation.
#3
What is the purpose of a solenoid valve in a refrigeration system?
To control the flow of refrigerant to the evaporator
ExplanationManages refrigerant flow to the evaporator.
#4
Which of the following is NOT a type of expansion valve?
Pressure Relief Valve
ExplanationNot a type of expansion valve in refrigeration systems.
#5
What is the main purpose of an accumulator in a refrigeration system?
To store excess refrigerant during low load conditions
ExplanationReservoir for surplus refrigerant during low-demand situations.
#6
Which of the following is a common type of refrigeration expansion device used in household refrigerators?
Capillary Tube
ExplanationCommonly used in household refrigerators to control expansion.
#7
What is superheat in a refrigeration system?
The difference between the refrigerant temperature and the evaporator temperature
ExplanationTemperature difference between refrigerant and evaporator.
#8
What is the primary function of a thermostatic expansion valve (TXV) in a refrigeration system?
To control the flow of refrigerant into the evaporator
ExplanationRegulates refrigerant entry into the evaporator.
#9
What role does a receiver play in a refrigeration system?
To store excess refrigerant during low load conditions
ExplanationStores surplus refrigerant during low-demand periods.
#10
What is the function of a sight glass in a refrigeration system?
To observe the flow of refrigerant through the system
ExplanationAllows visual monitoring of refrigerant flow.
#11
Which type of refrigeration expansion device maintains a constant superheat at the evaporator outlet?
Thermostatic Expansion Valve (TXV)
ExplanationKeeps a consistent superheat level at the evaporator outlet.
#12
In a refrigeration system, what does the term 'subcooling' refer to?
The amount of heat removed from the refrigerant liquid after it has completely condensed
ExplanationHeat removal after complete condensation of refrigerant liquid.
#13
In a refrigeration cycle, what is the purpose of the evaporator?
To remove heat from the refrigerant
ExplanationRemoves heat from the refrigerant in the refrigeration cycle.
#14
In a refrigeration system, what is the purpose of a crankcase heater?
To heat the compressor oil and prevent it from thickening
ExplanationHeats compressor oil to prevent thickening.
#15
In a refrigeration system, what does the term 'flash gas' refer to?
The vaporization of refrigerant before it enters the compressor
ExplanationVaporization of refrigerant before entering the compressor.