EPA 608 Type III EXAM QUESTIONS
WITH CORRECT SOLUTIONS||100%
GUARANTEED PASS||UPDATED
2026/2027 SYLLABUS||A+
GRADED!!!||<<NEWEST VERSION>>
ASHRAE Standard 15 - 1994 requires that each machinery room must activate an
alarm and mechanical ventilation before refrigerant concentrations exceed:
_________.
a) the Eel (Emergency Exposure Limit)
b) the TLV-TWA (Threshold Limit Value - Time Weighted Average)
c) the UTL (Upper Threshold Limit)
d) the COP (Coefficient of Performance) - ANSWER ✓ b) the TLV-TWA
(Threshold Limit Value - Time Weighted Average)
When evacuating a system, the use of too large a vacuum pump can cause:
_________.
a) trapped water to freeze
b) trapped oil to freeze
c) trapped refrigerant to freeze
d) valves to freeze - ANSWER ✓ a) trapped water to freeze
Where does refrigerant go after it leaves the purge unit of a low pressure
centrifugal system?
a) [To] the evaporator.
b) [To] the condenser.
c) [To] the compressor intercooler.
d) [To] the recovery service vessel. - ANSWER ✓ a) [To] the evaporator.
, If you are using a recovery machine manufactured AFTER November 15, 1993,
you must evacuate any low-pressure appliance to ________ before making a major
repair.
a) 0 psig
b) 15 inches of Hg vacuum
b) 25 inches of Hg vacuum
d) 25 mm of Hg absolute - ANSWER ✓ d) 25 mm of Hg absolute
A chiller's rupture disk is connected to the system's ___________.
1) low pressure side
2) high pressure side
3) never used - ANSWER ✓ 1) low pressure side
When leak testing a low pressure centrifugal, what is the maximum test pressure?
1) 0.1 psig
2) 10 psig
3) 10 inches of Mercury
4) 14.7 psia
5) 50 psig - ANSWER ✓ 2) 10 psig
What is the EPA's estimate for how much refrigerant vapor is left in an average
350 ton R-11 chiller at 0 psig pressure, once all the R-11 liquid has been removed?
1) 1.5 lbs
2) 3.0 lbs
3) 10 lbs
4) 20 lbs
5) 100 lbs
6) 1000 lbs - ANSWER ✓ 5) 100 lbs
How would you SAFELY reduce refrigerant loss from a purge-unit on a low
pressure unit?
1) Leak test and repair the chiller.
2) Seal the purge-unit discharge.
3) Plumb the purge-unit discharge back into the low side.
, 4) Plumb the purge-unit into the recovery unit. - ANSWER ✓ 1) Leak test and
repair the chiller.
When recharging a refrigeration system with R-11, why is refrigerant vapor added
first to raise the system pressure?
1) To prevent freezing of the water in the heat exchanger (water box).
2) To reduce the stress on the rupture disk.
3) To speed recharging.
4) To prevent condensation. - ANSWER ✓ 1) To prevent freezing of the water in
the heat exchanger (water box).
If you suspected a low pressure system leak at the water box, where would you
place your leak detector?
1) At the rupture disk.
2) At the recovery port.
3) At the vent valve.
4) At the service port.
5) At the water box drain port. - ANSWER ✓ 5) At the water box drain port.
A hydrostatic tube test kit will ________.
1) determine if a tube leaks
2) determine if there is water in the system
3) remove water from a machine
4) vent water - ANSWER ✓ 1) determine if a tube leaks
Leak testing at 20 psig would definitely cause which of the following to fail?
1) Condenser
2) Compressor
3) Purge-unit
4) Evaporator
5) Rupture disk - ANSWER ✓ 5) Rupture disk
EPA regulations require that all appliances containing more than 50 pounds of
refrigerant (except for commercial and industrial process refrigeration) be repaired
when the leak rate exceeds _________ of the charge per year.
WITH CORRECT SOLUTIONS||100%
GUARANTEED PASS||UPDATED
2026/2027 SYLLABUS||A+
GRADED!!!||<<NEWEST VERSION>>
ASHRAE Standard 15 - 1994 requires that each machinery room must activate an
alarm and mechanical ventilation before refrigerant concentrations exceed:
_________.
a) the Eel (Emergency Exposure Limit)
b) the TLV-TWA (Threshold Limit Value - Time Weighted Average)
c) the UTL (Upper Threshold Limit)
d) the COP (Coefficient of Performance) - ANSWER ✓ b) the TLV-TWA
(Threshold Limit Value - Time Weighted Average)
When evacuating a system, the use of too large a vacuum pump can cause:
_________.
a) trapped water to freeze
b) trapped oil to freeze
c) trapped refrigerant to freeze
d) valves to freeze - ANSWER ✓ a) trapped water to freeze
Where does refrigerant go after it leaves the purge unit of a low pressure
centrifugal system?
a) [To] the evaporator.
b) [To] the condenser.
c) [To] the compressor intercooler.
d) [To] the recovery service vessel. - ANSWER ✓ a) [To] the evaporator.
, If you are using a recovery machine manufactured AFTER November 15, 1993,
you must evacuate any low-pressure appliance to ________ before making a major
repair.
a) 0 psig
b) 15 inches of Hg vacuum
b) 25 inches of Hg vacuum
d) 25 mm of Hg absolute - ANSWER ✓ d) 25 mm of Hg absolute
A chiller's rupture disk is connected to the system's ___________.
1) low pressure side
2) high pressure side
3) never used - ANSWER ✓ 1) low pressure side
When leak testing a low pressure centrifugal, what is the maximum test pressure?
1) 0.1 psig
2) 10 psig
3) 10 inches of Mercury
4) 14.7 psia
5) 50 psig - ANSWER ✓ 2) 10 psig
What is the EPA's estimate for how much refrigerant vapor is left in an average
350 ton R-11 chiller at 0 psig pressure, once all the R-11 liquid has been removed?
1) 1.5 lbs
2) 3.0 lbs
3) 10 lbs
4) 20 lbs
5) 100 lbs
6) 1000 lbs - ANSWER ✓ 5) 100 lbs
How would you SAFELY reduce refrigerant loss from a purge-unit on a low
pressure unit?
1) Leak test and repair the chiller.
2) Seal the purge-unit discharge.
3) Plumb the purge-unit discharge back into the low side.
, 4) Plumb the purge-unit into the recovery unit. - ANSWER ✓ 1) Leak test and
repair the chiller.
When recharging a refrigeration system with R-11, why is refrigerant vapor added
first to raise the system pressure?
1) To prevent freezing of the water in the heat exchanger (water box).
2) To reduce the stress on the rupture disk.
3) To speed recharging.
4) To prevent condensation. - ANSWER ✓ 1) To prevent freezing of the water in
the heat exchanger (water box).
If you suspected a low pressure system leak at the water box, where would you
place your leak detector?
1) At the rupture disk.
2) At the recovery port.
3) At the vent valve.
4) At the service port.
5) At the water box drain port. - ANSWER ✓ 5) At the water box drain port.
A hydrostatic tube test kit will ________.
1) determine if a tube leaks
2) determine if there is water in the system
3) remove water from a machine
4) vent water - ANSWER ✓ 1) determine if a tube leaks
Leak testing at 20 psig would definitely cause which of the following to fail?
1) Condenser
2) Compressor
3) Purge-unit
4) Evaporator
5) Rupture disk - ANSWER ✓ 5) Rupture disk
EPA regulations require that all appliances containing more than 50 pounds of
refrigerant (except for commercial and industrial process refrigeration) be repaired
when the leak rate exceeds _________ of the charge per year.
