RETA Industrial Refrigeration Book 1 Exam
RETA INDUSTRIAL REFRIGERATION BOOK 1 EXAM NEWEST 2025
COMPLETE 200 QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
Getting more pumping capacity out of smaller reciprocating compressors vs. older and larger
compressors was achieved by? (pg. 5-12)
A) Increasing rpm and the number of cylinders
B) Increasing motor horsepower
C) Enlarging suction valve diameter
D) Reducing rpm and the number of cylinders - ANSWER-A) Increasing rpm and the number of
cylinders
The compression part of the stroke on a reciprocating compressor ends? (pg. 5-8)
A) When the suction valve opens
B) When the piston reaches top dead center
C) When the discharge valve closes
D) When the discharge valve opens - ANSWER-D) When the discharge valve opens
Compression ends on a rotary vane or rotary screw compressor? (pg. 5-14)
A) When the vapor leaves the suction port
B) When the vapor leaves the oil separator
C) When the vapor reaches the discharge port
D) When the vapor exits the discharge port - ANSWER-C) When the vapor reaches the discharge
port
What are the three types of positive displacement compressors used in refrigeration systems?
(pg. 5-3)
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, RETA Industrial Refrigeration Book 1 Exam
A) Piston, reciprocating, rotary screw
B) Reciprocating, rotary vane, rotary screw
C) Screw, piston, hermetically sealed
D) Reciprocating, vane, piston - ANSWER-B) Reciprocating, rotary vane, rotary screw
Which category of compressor "traps" a volume of refrigerant vapor prior to compression? (pg.
5-3)
A) Reciprocating
B) Dynamic displacement
C) Positive displacement
D) Rotary screw - ANSWER-C) Positive displacement
An advantage of owning a screw compressor over a reciprocating compressor would be? (pg. 5-
15)
A) Higher capacity for footprint of room space taken
B) Higher discharge temperatures
C) Operational maintenance costs over time are eliminated
D) Lower capacity for footprint of room space taken - ANSWER-A) Higher capacity for footprint
of room space taken
A rotary vane compressor has no significant starting load because? (pg. 6-13)
A) Rotary vane compressors are cooled by an oil jacket
B) Blades in the compressor form a seal
C) Centrifugal force allows the blades to seal only when the compressor is up to speed
D) Pumping takes place on start up - ANSWER-C) Centrifugal force allows the blades to seal only
when the compressor is up to speed
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, RETA Industrial Refrigeration Book 1 Exam
The operator in the engine room can estimate evaporator temperatures by checking: (assuming
no evaporator pressure control valves and minimal pressure drop) (pg. 6-3)
A) Compressor suction pressure
B) Compressor suction temperature
C) Compressor discharge pressure
D) Compressor discharge temperature - ANSWER-A) Compressor suction pressure
When suction pressure rises, the operator should? (pg. 6-3)
A) Put more water on the condenser
B) Start another compressor
C) Partially close the suction stop valve
D) Partially open the suction stop valve - ANSWER-B) Start another compressor
Slugging can cause compressor damage because? (pg. 6-20)
A) The compressor temperature is lowered
B) The oil temperature is lowered
C) The compressor is designed to pump liquid and vapor
D) The compressor is designed to pump vapor only - ANSWER-D) The compressor is designed to
pump vapor only
How can an operator get thoroughly acquainted with an unfamiliar refrigeration plant? (pg. 6-
4/5)
A) By studying the P&ID's and confirming them against the actual system
B) By a brief review of the SOPs and experimentation
C) By asking questions of the personnel director and the plant manager
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, RETA Industrial Refrigeration Book 1 Exam
D) It is not necessary to become thoroughly familiar with a plant as all refrigeration systems are
operated the same - ANSWER-A) By studying the P&ID's and confirming them against the actual
system
A crankcase oil heater is to be "ON" when? (pg. 6-9)
A) The suction temperature is less than 80°F
B) The compressor is "OFF"
C) The compressor is running
D) The ambient temperature is below 60°F - ANSWER-B) The compressor is "OFF"
When coming on duty, the operator should? (pg. 6-8)
A) Review the log sheet which should reflect what has happened during the previous shift
B) Perform their own evaluation without allowing the log record to influence their impartial
evaluation
C) Immediately begin work as the outgoing operator would inform you of any problems or
issues
D) Quickly check the logs and begin work order as the alarms will notify you of any problems -
ANSWER-A) Review the log sheet which should reflect what has happened during the previous
shift
An operator should check all pressures and temperatures when first coming on duty? (pg. 6-8)
A) To verify the previous operator has properly recorded his logs
B) To understand the operating condition of the system
C) Because the walkthrough will show everyone who is on duty
D) Because it is required by the regulations - ANSWER-B) To understand the operating condition
of the system
An operator should check all pressures and temperatures before leaving a shift? (pg. 6-8)
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RETA INDUSTRIAL REFRIGERATION BOOK 1 EXAM NEWEST 2025
COMPLETE 200 QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
Getting more pumping capacity out of smaller reciprocating compressors vs. older and larger
compressors was achieved by? (pg. 5-12)
A) Increasing rpm and the number of cylinders
B) Increasing motor horsepower
C) Enlarging suction valve diameter
D) Reducing rpm and the number of cylinders - ANSWER-A) Increasing rpm and the number of
cylinders
The compression part of the stroke on a reciprocating compressor ends? (pg. 5-8)
A) When the suction valve opens
B) When the piston reaches top dead center
C) When the discharge valve closes
D) When the discharge valve opens - ANSWER-D) When the discharge valve opens
Compression ends on a rotary vane or rotary screw compressor? (pg. 5-14)
A) When the vapor leaves the suction port
B) When the vapor leaves the oil separator
C) When the vapor reaches the discharge port
D) When the vapor exits the discharge port - ANSWER-C) When the vapor reaches the discharge
port
What are the three types of positive displacement compressors used in refrigeration systems?
(pg. 5-3)
1|Page
, RETA Industrial Refrigeration Book 1 Exam
A) Piston, reciprocating, rotary screw
B) Reciprocating, rotary vane, rotary screw
C) Screw, piston, hermetically sealed
D) Reciprocating, vane, piston - ANSWER-B) Reciprocating, rotary vane, rotary screw
Which category of compressor "traps" a volume of refrigerant vapor prior to compression? (pg.
5-3)
A) Reciprocating
B) Dynamic displacement
C) Positive displacement
D) Rotary screw - ANSWER-C) Positive displacement
An advantage of owning a screw compressor over a reciprocating compressor would be? (pg. 5-
15)
A) Higher capacity for footprint of room space taken
B) Higher discharge temperatures
C) Operational maintenance costs over time are eliminated
D) Lower capacity for footprint of room space taken - ANSWER-A) Higher capacity for footprint
of room space taken
A rotary vane compressor has no significant starting load because? (pg. 6-13)
A) Rotary vane compressors are cooled by an oil jacket
B) Blades in the compressor form a seal
C) Centrifugal force allows the blades to seal only when the compressor is up to speed
D) Pumping takes place on start up - ANSWER-C) Centrifugal force allows the blades to seal only
when the compressor is up to speed
2|Page
, RETA Industrial Refrigeration Book 1 Exam
The operator in the engine room can estimate evaporator temperatures by checking: (assuming
no evaporator pressure control valves and minimal pressure drop) (pg. 6-3)
A) Compressor suction pressure
B) Compressor suction temperature
C) Compressor discharge pressure
D) Compressor discharge temperature - ANSWER-A) Compressor suction pressure
When suction pressure rises, the operator should? (pg. 6-3)
A) Put more water on the condenser
B) Start another compressor
C) Partially close the suction stop valve
D) Partially open the suction stop valve - ANSWER-B) Start another compressor
Slugging can cause compressor damage because? (pg. 6-20)
A) The compressor temperature is lowered
B) The oil temperature is lowered
C) The compressor is designed to pump liquid and vapor
D) The compressor is designed to pump vapor only - ANSWER-D) The compressor is designed to
pump vapor only
How can an operator get thoroughly acquainted with an unfamiliar refrigeration plant? (pg. 6-
4/5)
A) By studying the P&ID's and confirming them against the actual system
B) By a brief review of the SOPs and experimentation
C) By asking questions of the personnel director and the plant manager
3|Page
, RETA Industrial Refrigeration Book 1 Exam
D) It is not necessary to become thoroughly familiar with a plant as all refrigeration systems are
operated the same - ANSWER-A) By studying the P&ID's and confirming them against the actual
system
A crankcase oil heater is to be "ON" when? (pg. 6-9)
A) The suction temperature is less than 80°F
B) The compressor is "OFF"
C) The compressor is running
D) The ambient temperature is below 60°F - ANSWER-B) The compressor is "OFF"
When coming on duty, the operator should? (pg. 6-8)
A) Review the log sheet which should reflect what has happened during the previous shift
B) Perform their own evaluation without allowing the log record to influence their impartial
evaluation
C) Immediately begin work as the outgoing operator would inform you of any problems or
issues
D) Quickly check the logs and begin work order as the alarms will notify you of any problems -
ANSWER-A) Review the log sheet which should reflect what has happened during the previous
shift
An operator should check all pressures and temperatures when first coming on duty? (pg. 6-8)
A) To verify the previous operator has properly recorded his logs
B) To understand the operating condition of the system
C) Because the walkthrough will show everyone who is on duty
D) Because it is required by the regulations - ANSWER-B) To understand the operating condition
of the system
An operator should check all pressures and temperatures before leaving a shift? (pg. 6-8)
4|Page
