Compressors Chapter 23 Exam
Questions with Revised Answers –
UPDATED!!
Describe The reciprocating compressor valve plate - Answer-Holds the suction and
discharge flapper valves. Located between the head of the compressor and the top of
the cylinder wall
Describe The reciprocating compressor head - Answer-The component that holds the
top of the cylinder and its assembly together
Describe The reciprocating compressor shaft seal - Answer-has a rubber surface to
keep the refrigerant and the atmosphere separated
Describe The reciprocating compressor internal motor overload device - Answer-Protect
the motor from overheating, they are embedded into or near the windings.
Describe The reciprocating compressor pilot duty overload device - Answer-Pilot duty
motor overload device: interrupts the controlled voltage
Describe The reciprocating compressor coupling - Answer-obtains the correct shaft
alignment
Describe The reciprocating compressor discus valve - Answer-allows a closer tolerance
inside the compressor cylinder at the top dead center = more efficient because it
reduces clearance volume
Name two things in the design of a reciprocating compressor that control its efficiency? -
Answer-clearance volume and bore size
In what speed in RPM does a hermetic compressor normally turn - Answer-1750 rpm
and 3450 rpm
What effect does a small amount of liquid have on a compressor over a long period of
time? - Answer-liquid slugging = oil dilution
What lubricates the refrigeration compressor? - Answer-Oil
What can a service technician do to keep the refrigeration system operating at peak
efficiency? - Answer-Keeping the evaporator and condenser clean will enhance the
Questions with Revised Answers –
UPDATED!!
Describe The reciprocating compressor valve plate - Answer-Holds the suction and
discharge flapper valves. Located between the head of the compressor and the top of
the cylinder wall
Describe The reciprocating compressor head - Answer-The component that holds the
top of the cylinder and its assembly together
Describe The reciprocating compressor shaft seal - Answer-has a rubber surface to
keep the refrigerant and the atmosphere separated
Describe The reciprocating compressor internal motor overload device - Answer-Protect
the motor from overheating, they are embedded into or near the windings.
Describe The reciprocating compressor pilot duty overload device - Answer-Pilot duty
motor overload device: interrupts the controlled voltage
Describe The reciprocating compressor coupling - Answer-obtains the correct shaft
alignment
Describe The reciprocating compressor discus valve - Answer-allows a closer tolerance
inside the compressor cylinder at the top dead center = more efficient because it
reduces clearance volume
Name two things in the design of a reciprocating compressor that control its efficiency? -
Answer-clearance volume and bore size
In what speed in RPM does a hermetic compressor normally turn - Answer-1750 rpm
and 3450 rpm
What effect does a small amount of liquid have on a compressor over a long period of
time? - Answer-liquid slugging = oil dilution
What lubricates the refrigeration compressor? - Answer-Oil
What can a service technician do to keep the refrigeration system operating at peak
efficiency? - Answer-Keeping the evaporator and condenser clean will enhance the
