1
RETA CARO EXAM PRACTICE TEST
QUESTIONS WITH VERIFIED
SOLUTIONS
Conduction is defined as heat energy that is - correct-answer - moving through a
solid substance
What is the primary purpose of a refrigeration system ? - correct-answer - achieve
and maintain a temperature
What is a hazard of trapping liquid ? - correct-answer - A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of
temperature increase - correct-answer - 100 to 150 psi
How can an operator get thoroughly acquainted with an unfamiliar refrigeration
plant ? - correct-answer - They can study the P & IDs and confirming against the
actual system
, 2
Why do rotary vane compressors have very little starting load ? - correct-answer -
The blades only seal when the compressor is up to speed
What are the three types of positive displacement compressors used in industrial
refrigeration systems ? - correct-answer - Reciprocating , rotary vane , rotary
screw
The compression part of the stroke of a reciprocating compressor ends when the -
correct-answer - discharge valve opens
Why is the discharge temperature of a screw compressor lower than a
reciprocating compressor - correct-answer - Large quantities of oil are circulated
through the compression chamber
What is the idea behind using hermetic compressors ? - correct-answer - To
eliminate the shaft seal and to prevent refrigerant leaks
What is the purpose of the refrigeration compressor ? - correct-answer - To draw
vapor away from the evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed
What is the published lower explosive limit for ammonia ? - correct-answer - 16 %
RETA CARO EXAM PRACTICE TEST
QUESTIONS WITH VERIFIED
SOLUTIONS
Conduction is defined as heat energy that is - correct-answer - moving through a
solid substance
What is the primary purpose of a refrigeration system ? - correct-answer - achieve
and maintain a temperature
What is a hazard of trapping liquid ? - correct-answer - A possible release
How much can the pressure of trapped liquid increase per degree Fahrenheit of
temperature increase - correct-answer - 100 to 150 psi
How can an operator get thoroughly acquainted with an unfamiliar refrigeration
plant ? - correct-answer - They can study the P & IDs and confirming against the
actual system
, 2
Why do rotary vane compressors have very little starting load ? - correct-answer -
The blades only seal when the compressor is up to speed
What are the three types of positive displacement compressors used in industrial
refrigeration systems ? - correct-answer - Reciprocating , rotary vane , rotary
screw
The compression part of the stroke of a reciprocating compressor ends when the -
correct-answer - discharge valve opens
Why is the discharge temperature of a screw compressor lower than a
reciprocating compressor - correct-answer - Large quantities of oil are circulated
through the compression chamber
What is the idea behind using hermetic compressors ? - correct-answer - To
eliminate the shaft seal and to prevent refrigerant leaks
What is the purpose of the refrigeration compressor ? - correct-answer - To draw
vapor away from the evaporator at the same rate it is being generated and to
raise the pressure of that vapor to a point where it can be condensed
What is the published lower explosive limit for ammonia ? - correct-answer - 16 %
