Refrigeration Basics Quiz Questions,Nate Core

Oxygen will explode when it comes into contact with oil 
True 
False

The presence of refrigerant vapor upstream of the _____ is very undesirable 
A:Condenser 
B:Evaporator 
C:Expansion device 
D:Compressor

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

Rolling vane type belongs to which type of compressor: 
A:Rotary Compressor 
B:Centrifugal Compressor
C: Reciprocating Compressor 
D:Scroll Compressors

The pressure drop caused in the suction filter will be ____: 
A:1 psi 
B:2 psi 
C:1.5 psi 
D:3 psi

The _______connects the evaporator to the compressor 
A:Suction Line 
B:Discharge Line 
C:Liquid Line 
D:Steam 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

The _____ the system refrigerant charge, the more reliably the refrigeration system performs: 
A:Higher 
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

Subcooling of the liquid refrigerant cause some pressure drop 
True 
False

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

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

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

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

Cool vapor flows in which of the following in a refrigeration system: 
A:Liquid line 
B:Suction line 
C:Discharge line 
D:Steam line

As the Suction pressure comes down, the compressor capacity will ______: 
A:Decrease 
B:Increase 
C:Remains same