COMPRESSORS MODULE 2 TEST
1 QUESTIONS WITH ALL
CORRECT ANSWERS
Piston displacement - Answer-The compressor displacement equals the rpm of the
drive motor multiplied by the ___.
Centrifugal compressor - Answer-Throttling valves are used for capacity control on a
___.
Screw compressor - Answer-A simple capacity control method that provides capacity
steps of 25 percent, 50 percent, and 75 percent using plug valve would be found on a
___.
Copper oxide formation - Answer-Purging refrigerant lines with nitrogen during their
installation prevents ___.
Temperature of system piping and components - Answer-Refrigerant migration into the
compressor crankcase will not usually occur if the temperature where the compressor is
located is kept well above the ___.
10 percent - Answer-The measured voltage to a compressor should not vary from the
nameplate value by more than ___.
Dirty condenser coil - Answer-The system condition that may cause a compressor
motor's overload device to open is a(n) ___.
A long liquid line - Answer-Which of the following system piping issues is likely to result
in a larger refrigerant charge?
Differential pressure - Answer-What type of oil pressure safety switch is used on many
semihermetic compressors?
Open drive - Answer-Which compressor type has the motor separated from the
compressor?
Suction valve closes - Answer-What happens in a reciprocating compressor when the
piston reaches its lowest?
Reciprocating compressor - Answer-Oil scoops can be found in a ____.
1 QUESTIONS WITH ALL
CORRECT ANSWERS
Piston displacement - Answer-The compressor displacement equals the rpm of the
drive motor multiplied by the ___.
Centrifugal compressor - Answer-Throttling valves are used for capacity control on a
___.
Screw compressor - Answer-A simple capacity control method that provides capacity
steps of 25 percent, 50 percent, and 75 percent using plug valve would be found on a
___.
Copper oxide formation - Answer-Purging refrigerant lines with nitrogen during their
installation prevents ___.
Temperature of system piping and components - Answer-Refrigerant migration into the
compressor crankcase will not usually occur if the temperature where the compressor is
located is kept well above the ___.
10 percent - Answer-The measured voltage to a compressor should not vary from the
nameplate value by more than ___.
Dirty condenser coil - Answer-The system condition that may cause a compressor
motor's overload device to open is a(n) ___.
A long liquid line - Answer-Which of the following system piping issues is likely to result
in a larger refrigerant charge?
Differential pressure - Answer-What type of oil pressure safety switch is used on many
semihermetic compressors?
Open drive - Answer-Which compressor type has the motor separated from the
compressor?
Suction valve closes - Answer-What happens in a reciprocating compressor when the
piston reaches its lowest?
Reciprocating compressor - Answer-Oil scoops can be found in a ____.
