Refrigeration Cycle
In a typical refrigeration system, where is the temperature of the refrigerant gas at the highest? A) at the compressor discharger B) at the compressor suction C) in the expansion valve D) in the reciever
A
In order of direction of flow, the LP side of the refrigeration system is considered to exist between what two components? A) expansion valve to the compressor B) receiver to the expansion coil C) expansion valve to the evaporator D) condenser to the expansion valve
A
The refrigerant gas returning to the compressor should be in what condition? A) superheated B) saturated C) dense D) flooded
A
The temperature of the refrigerant in the evaporator coil depends most upon what factor? A) refrigerant pressure in the evaporator B) cooling water temp to the condenser C) heat load in the refrigerator compartment D) solenoid valve in the liquid line
A
What would the pressure and physical state of the refrigerant residing in the system receiver? A) High pressure vapor on top of high pressure liquid B) High pressure liquid on top of high pressure vapor C) Low pressure vapor on top of low pressure liquid D) Low pressure liquid on top of low pressure vapor
A
In a small reefer appliance using HFC-134a the greatest temp drop is across what? A) evaporator B) thermal expansion valve C) compressor D) reciever
B
In a typical refrigeration system, refrigerant leaving the reciever will then flow to what system component? A) evaporator coils B) liquid line strainer C) back pressure regulator D) condenser
B
In which of the listed refrigeration system componnents does the superheating of refrigerant take place? A) expansion valve B) evaporator C) drier D) Receiver
B
In a vapor compression refrigeration cycle, the temperature of a liquid refrigerant experiences its greatest decrease flowing through what component? A) evaporator B) compressor C) expansion valve D) condenser
C
In the order of direction of flow, which of the listed components is considered to separate the HP side of the refrigeration cycle from the LP side of the cycle? A) the condenser and the expansion valve B) the king valve and the solenoid valve C) the compressor and the expansion valve D) the condenser and the solenoid valve
C
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions? A) High pressure liquid B) High pressure vapor C) Low pressure vapor D) Low pressure liquid
C
Refrigerant enters the condenser in what condition? A) HP liquid B) LP vapor C) HP vapor D) LP liquid
C
Refrigerant leaving the metering device in a refrigeration system is in which of the following conditions? A) sub cooled liquid B) superheated vapor C) saturated liquid/ vapor mixture D) superheated liquid/ vapor mixture
C
When multiple refrigeration evaporators are served by the same compressor and operate at different temperatures, what is true concerning the pressure of the coldest evaporator? A) It is higher than the pressure in the warmest evaporator B) It is the same as any other evaporator in the system C) It is lower than the pressure in the warmest evaporator D) It is controlled by adjusting the thermal expansion valve
C
Which of the following statement is correct concering a multi coil reefer system? A) liquid receiver functions to collect and remove the non condensable gases B) a thermostatic expansion valve is used to control reefer space temp C) refrigeration temp in an evaporator is directly related to refrigerant pressure D) dehydrators must be used continuously in a reefer system
C
In a small appliance HFC-134a the greatest temperature drop is across what? A) evaporator B) receiver C) compressor D) condenser
D
In a vapor compression type refrigeration cycle, the refrigerant temp decreases the most when passing through which system component? A) evaporator B) condenser receiver C) compressor D) expansion valve
D
The LP refrigerant leaves the evaporator of a refrigeration system in what condition? A) sub cooled liquid B) high temp liquid C) oil saturated liquid D) superheated vapor
D
The component of a reefer system in which the refrigerant vaporizes and absorbs heat is known as what? A) condenser B) vapor generator C) accumulator D) evaportator
D
Under normal conditions, the refrigerant enters the compressor in an operating refrigeration system in what condition and or state? A) liquid B) dry saturated gas C) wet saturated gas D) superheated vapor
D
Where would you find the greatest amount of refrigerant superheat in an operating refrigeration system? A) evaporator outlet B) condenser outlet C) receiver outlet D) compressor outlet
D
Which of the listed refrigeration components keeps the refrigerant circulating throughout the system? A) expansion valve B) condenser C) evaporator D) compressor
D
