SKILLCAT TYPE 3 EPA 608 Latest real exam
questions and correct answers review 2026-2027/
EPA 608 TYPE 3 Exam prep / EPA 608
SKILLCAT TYPE 3 Exam review
1: What type of equipment can be worked on with Type III certification?
A. High-pressure appliances
B. Low-pressure appliances
C. Small appliances
D. Medium-pressure appliances
-ANSWER- B
Rationale: Type III certification covers low-pressure appliances.
2: The most efficient method of leak checking a charged low-pressure refrigeration
unit is to:
A. Pressurize the system using controlled hot water or heater blankets
B. Use compressed air to pressurize the system
C. Use oxygen to pressurize the system
D. Pull a deep vacuum and check for pressure rise
-ANSWER- A
Rationale: Controlled hot water or heater blankets pressurize the system efficiently
for leak checking without introducing contaminants.
3: When pressurizing a low-pressure system for leak detection, do not exceed:
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
-ANSWER- B
Rationale: Do not exceed 10 psig when pressurizing a low-pressure system for leak
detection.
4: After reaching the required vacuum on an appliance when servicing, moisture is
indicated by:
1
,A. A steady vacuum reading
B. Multiple rises in pressure over a period of time with increase of pauses between
rises
C. A single pressure rise that stabilizes
D. A drop in pressure below the required vacuum
-ANSWER- B
Rationale: Multiple rises in pressure over time with increasing pauses between
rises indicate moisture in the system.
5: EPA required evacuation levels for recovery or recycling equipment
manufactured or imported before Nov. 15, 1993 is:
A. 25 inches Hg
B. 25 mm Hg absolute
C. 15 inches Hg
D. 10 inches Hg
-ANSWER- A
Rationale: Equipment manufactured before Nov. 15, 1993 must evacuate to 25
inches Hg.
6: EPA required evacuation levels for recovery or recycling equipment
manufactured or imported on or after Nov. 15, 1993 is:
A. 25 inches Hg
B. 25 mm Hg absolute
C. 15 inches Hg
D. 10 inches Hg
-ANSWER- B
Rationale: Equipment manufactured on or after Nov. 15, 1993 must evacuate to 25
mm Hg absolute.
7: What can be used to pressurize a chiller system before opening the system for a
non-major repair?
A. Compressed air
B. Controlled hot water
C. Oxygen
D. Nitrogen at 50 psig
-ANSWER- B
Rationale: Controlled hot water can be used to pressurize a chiller system before
opening it for a non-major repair.
2
,8: Refrigerant recovery from a system using R-11 or R-123 starts with:
A. Vapor recovery followed by liquid removal
B. Liquid removal and is followed by vapor recovery
C. Simultaneous liquid and vapor recovery
D. Only vapor recovery
-ANSWER- B
Rationale: Refrigerant recovery from a system using R-11 or R-123 starts with
liquid removal and is followed by vapor recovery.
9: If a strong odor is detected during the recovery process:
A. A compressor burnout may have occurred
B. The refrigerant is pure
C. The system is operating normally
D. The recovery unit is malfunctioning
-ANSWER- A
Rationale: A strong odor during recovery may indicate a compressor burnout has
occurred.
10: When installing more than one, pressure relief valves must be installed:
A. In series
B. In parallel
C. At opposite ends of the system
D. Vertically
-ANSWER- B
Rationale: Pressure relief valves must be installed in parallel when more than one
is used.
11: The owner must keep records of refrigerant added during service and
maintenance on equipment with charges of:
A. 5 lbs. or greater
B. 15 lbs. or greater
C. 50 lbs. or greater
D. 100 lbs. or greater
-ANSWER- C
Rationale: Records of refrigerant added during service and maintenance must be
kept for equipment with charges of 50 lbs. or greater.
12: After all the liquid has been removed from an average 350 ton chiller,
approximately how much vapor refrigerant remains in the system?
3
, A. 25 lbs.
B. 50 lbs.
C. 100 lbs.
D. 200 lbs.
-ANSWER- C
Rationale: Approximately 100 lbs. of vapor refrigerant remains in the system after
all liquid has been removed from an average 350 ton chiller.
13: When charging a system with a low-pressure refrigerant, it should be
introduced as a vapor to raise saturation temperature to a minimum of:
A. 28 degrees
B. 32 degrees
C. 36 degrees
D. 40 degrees
-ANSWER- C
Rationale: Refrigerant should be introduced as a vapor to raise saturation
temperature to a minimum of 36 degrees.
14: Where is the purge unit located in a low-pressure system?
A. The bottom of the evaporator
B. The top of the condenser
C. The side of the compressor
D. The liquid line
-ANSWER- B
Rationale: The purge unit is located at the top of the condenser in a low-pressure
system.
15: In a chiller, air and other noncondensables collect:
A. At the bottom of the evaporator
B. At the top section of the condenser
C. In the compressor
D. In the liquid line
-ANSWER- B
Rationale: Air and other noncondensables collect at the top section of the
condenser in a chiller.
16: A rupture disk for a low-pressure chiller will rupture at:
A. 10 psig
B. 15 psig
4
questions and correct answers review 2026-2027/
EPA 608 TYPE 3 Exam prep / EPA 608
SKILLCAT TYPE 3 Exam review
1: What type of equipment can be worked on with Type III certification?
A. High-pressure appliances
B. Low-pressure appliances
C. Small appliances
D. Medium-pressure appliances
-ANSWER- B
Rationale: Type III certification covers low-pressure appliances.
2: The most efficient method of leak checking a charged low-pressure refrigeration
unit is to:
A. Pressurize the system using controlled hot water or heater blankets
B. Use compressed air to pressurize the system
C. Use oxygen to pressurize the system
D. Pull a deep vacuum and check for pressure rise
-ANSWER- A
Rationale: Controlled hot water or heater blankets pressurize the system efficiently
for leak checking without introducing contaminants.
3: When pressurizing a low-pressure system for leak detection, do not exceed:
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
-ANSWER- B
Rationale: Do not exceed 10 psig when pressurizing a low-pressure system for leak
detection.
4: After reaching the required vacuum on an appliance when servicing, moisture is
indicated by:
1
,A. A steady vacuum reading
B. Multiple rises in pressure over a period of time with increase of pauses between
rises
C. A single pressure rise that stabilizes
D. A drop in pressure below the required vacuum
-ANSWER- B
Rationale: Multiple rises in pressure over time with increasing pauses between
rises indicate moisture in the system.
5: EPA required evacuation levels for recovery or recycling equipment
manufactured or imported before Nov. 15, 1993 is:
A. 25 inches Hg
B. 25 mm Hg absolute
C. 15 inches Hg
D. 10 inches Hg
-ANSWER- A
Rationale: Equipment manufactured before Nov. 15, 1993 must evacuate to 25
inches Hg.
6: EPA required evacuation levels for recovery or recycling equipment
manufactured or imported on or after Nov. 15, 1993 is:
A. 25 inches Hg
B. 25 mm Hg absolute
C. 15 inches Hg
D. 10 inches Hg
-ANSWER- B
Rationale: Equipment manufactured on or after Nov. 15, 1993 must evacuate to 25
mm Hg absolute.
7: What can be used to pressurize a chiller system before opening the system for a
non-major repair?
A. Compressed air
B. Controlled hot water
C. Oxygen
D. Nitrogen at 50 psig
-ANSWER- B
Rationale: Controlled hot water can be used to pressurize a chiller system before
opening it for a non-major repair.
2
,8: Refrigerant recovery from a system using R-11 or R-123 starts with:
A. Vapor recovery followed by liquid removal
B. Liquid removal and is followed by vapor recovery
C. Simultaneous liquid and vapor recovery
D. Only vapor recovery
-ANSWER- B
Rationale: Refrigerant recovery from a system using R-11 or R-123 starts with
liquid removal and is followed by vapor recovery.
9: If a strong odor is detected during the recovery process:
A. A compressor burnout may have occurred
B. The refrigerant is pure
C. The system is operating normally
D. The recovery unit is malfunctioning
-ANSWER- A
Rationale: A strong odor during recovery may indicate a compressor burnout has
occurred.
10: When installing more than one, pressure relief valves must be installed:
A. In series
B. In parallel
C. At opposite ends of the system
D. Vertically
-ANSWER- B
Rationale: Pressure relief valves must be installed in parallel when more than one
is used.
11: The owner must keep records of refrigerant added during service and
maintenance on equipment with charges of:
A. 5 lbs. or greater
B. 15 lbs. or greater
C. 50 lbs. or greater
D. 100 lbs. or greater
-ANSWER- C
Rationale: Records of refrigerant added during service and maintenance must be
kept for equipment with charges of 50 lbs. or greater.
12: After all the liquid has been removed from an average 350 ton chiller,
approximately how much vapor refrigerant remains in the system?
3
, A. 25 lbs.
B. 50 lbs.
C. 100 lbs.
D. 200 lbs.
-ANSWER- C
Rationale: Approximately 100 lbs. of vapor refrigerant remains in the system after
all liquid has been removed from an average 350 ton chiller.
13: When charging a system with a low-pressure refrigerant, it should be
introduced as a vapor to raise saturation temperature to a minimum of:
A. 28 degrees
B. 32 degrees
C. 36 degrees
D. 40 degrees
-ANSWER- C
Rationale: Refrigerant should be introduced as a vapor to raise saturation
temperature to a minimum of 36 degrees.
14: Where is the purge unit located in a low-pressure system?
A. The bottom of the evaporator
B. The top of the condenser
C. The side of the compressor
D. The liquid line
-ANSWER- B
Rationale: The purge unit is located at the top of the condenser in a low-pressure
system.
15: In a chiller, air and other noncondensables collect:
A. At the bottom of the evaporator
B. At the top section of the condenser
C. In the compressor
D. In the liquid line
-ANSWER- B
Rationale: Air and other noncondensables collect at the top section of the
condenser in a chiller.
16: A rupture disk for a low-pressure chiller will rupture at:
A. 10 psig
B. 15 psig
4
