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Refrigeration License Written Test Study Material #2 Exam Questions and Answers
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  • Refrigeration machine operator
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  • Refrigeration Machine Operator

What may be the cause of compressor knocking? - Answer-Liquid refrigerant slugging in the compressor. What will happen if the Spring on the TEV was to break ? - Answer-Flood the evaporator and raise suction pressure. What happens in the TEV equalizer line when pressure drops in the evaporator...

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  • September 10, 2024
  • 3
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • refrigeration license written test study material
  • what may be the cause of compressor knocking an

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  • Refrigeration machine operator
  • Refrigeration machine operator

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Refrigeration License Written Test Study
Material #2 Exam Questions and
Answers
What may be the cause of compressor knocking? - Answer-Liquid refrigerant slugging
in the compressor.

What will happen if the Spring on the TEV was to break ? - Answer-Flood the
evaporator and raise suction pressure.

What happens in the TEV equalizer line when pressure drops in the evaporator ? -
Answer-The TEV equalizer compensates for the loss in pressure.

What is the function of the Service Valve Stem Cap ? - Answer-To protect the valve
from leaking the refrigerant.

What is the primary advantage of Semi Hermetic compressors over fully Hermetic ones.
- Answer-That a Semi Hermetic compressor can be serviced or repaired.

What happens when a portable compressor recovery unit is used to recover vapor from
the system ? - Answer-The vapor density is decreased.

What is the purpose of using un-loaders ? - Answer-To decrease capacity in the
compressor.

What determines the amount of pressure that flows through the orifice plates ? -
Answer-The pressure differential between the high and low sides.

The best way to test a thermometer is ? - Answer-By testing in it in ice cold water or
placing it in the freezer.

How many Phases will a 3 HP electric motor use ? - Answer-It will use 3 phases.

What causes a restriction of refrigerant flow from the high side to the low side ? -
Answer-The TEV, TEV.

When a Halide torch turns from blue to green or purple, it means that: - Answer-A leak
was detected.

How is AC voltage turned into DC voltage ? - Answer-With a Rectifier>

What device is used to cycle a compressor On and Off ? - Answer-A Thermostat.

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