Refrigeration Basics Quiz Questions,Nate Core

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salvatorefricano
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304898
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Refrigeration Basics Quiz Questions,Nate Core
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2015-07-07 13:00:58
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Refrigeration Basics Quiz Questions Nate Core
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Refrigeration Basics Quiz Questions,Nate Core
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  1. Oxygen will explode when it comes into contact with oil 
    True 
    False
    True
  2. The presence of refrigerant vapor upstream of the _____ is very undesirable 
    A:Condenser 
    B:Evaporator 
    C:Expansion device 
    D:Compressor
    C:Expansion device
  3. 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
  4. Rolling vane type belongs to which type of compressor: 
    A:Rotary Compressor 
    B:Centrifugal Compressor
    C: Reciprocating Compressor 
    D:Scroll Compressors
    A:Rotary Compressor
  5. 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
  6. The _______connects the evaporator to the compressor 
    A:Suction Line 
    B:Discharge Line 
    C:Liquid Line 
    D:Steam Line
    A:Suction Line
  7. 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
  8. The _____ the system refrigerant charge, the more reliably the refrigeration system performs: 
    A:Higher 
    B:Lower
    B:Lower
  9. 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
  10. Subcooling of the liquid refrigerant cause some pressure drop 
    True 
    False
    True
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. As the Suction pressure comes down, the compressor capacity will ______: 
    A:Decrease 
    B:Increase 
    C:Remains same
    A:Decrease

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