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.
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.
