Oxygen will explode when it comes into contact with oil
True
False
True
The presence of refrigerant vapor upstream of the _____ is very undesirable
A:Condenser
B:Evaporator
C:Expansion device
D:Compressor
C:Expansion device
Oil used in refrigeration system is used for which of the following:
A:Both the options are correct
B:For lubrication only
C:Seal the moving parts of a compressor only
A:Both the options are correct
Rolling vane type belongs to which type of compressor:
A:Rotary Compressor
B:Centrifugal Compressor
C: Reciprocating Compressor
D:Scroll Compressors
A:Rotary Compressor
The pressure drop caused in the suction filter will be ____:
A:1 psi
B:2 psi
C:1.5 psi
D:3 psi
B:2 psi
The _______connects the evaporator to the compressor
A:Suction Line
B:Discharge Line
C:Liquid Line
D:Steam Line
A:Suction Line
The refrigerant velocity inside a pipe depends on which of the following: (multiple answer question)
A:The mass flow rate
B:Density of the refrigerant
C:Inside diameter of the pipe
D: All of the above
A:The mass flow rate
B:Density of the refrigerant
C:Inside diameter of the pipe
D: All of the above
The _____ the system refrigerant charge, the more reliably the refrigeration system performs:
A:Higher
B:Lower
B:Lower
Which of the following helps in maintaining the pressure difference between the high-pressure (condenser) and low-pressure (evaporator) sides of the refrigeration system
A:Solenoid valves
B:TXV
C:Suction line filter
D:Hot gas muffler
B:TXV
Subcooling of the liquid refrigerant cause some pressure drop
True
False
True
In which of the following pipes the higher-velocity refrigerant is closer to the inner walls of the pipe:
A: Large diameter pipe
B:Small diameter pipe
B:Small diameter pipe
The recommended maximum-velocity limit of refrigerant flow in suction line is:
A:5 m/s
B:20 m/s
C:10 m/s
D:25 m/s
B:20 m/s
Which of the following is used for testing the leaks in the entire refrigeration circuit before it can be charged with refrigerant:
A:Dry Oxygen gas
B:Dry Carbon dioxide gas
C:Dry Nitrogen gas
D:Dry Hydrogen gas
C:Dry Nitrogen gas
A low pressure switch is provided to stop the compressor when the compressor _______ pressure falls below the safety limits:
A:Discharge
B:Either Suction or Discharge
C:Suction
C:Suction
Cool vapor flows in which of the following in a refrigeration system:
A:Liquid line
B:Suction line
C:Discharge line
D:Steam line
B:Suction line
As the Suction pressure comes down, the compressor capacity will ______:
A:Decrease
B:Increase
C:Remains same