EPA 608 CERTIFICATION TEST 2026/2027 BANK
400 QUESTIONS WITH DETAILED VERIFIED
ANSWERS / EXAM QUESTIONS WILL COME
FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
When the refrigerant is put back into a Type III chiller,
following recovery and system repair, where is it added? -
....ANSWER...The charging valve on the evaporator.
What method is used to find suspected water tube leaks in
chillers? - ....ANSWER...Hydrostatic (tube) test
What temperature should be attained when removing oil
from a low pressure system to ensure a lower level of
refrigerants in the oil? - ....ANSWER...130-Degrees F
The typical design burst pressure for a rupture disc is what? -
....ANSWER...15 PSIG
,Excessive moisture collection in the purge unit can indicate
what? - ....ANSWER...Tube Leakage
Vacuum pumps need to be capable of pulling what level of
vacuum? - ....ANSWER...500 microns
All refrigeration systems containing more than 50 lbs. of
refrigerant must be repaired when the annual leak rate
exceeds___? - ....ANSWER...35%
The most efficient method of leak checking a charged low-
pressure system is to use? - ....ANSWER...Controlled hot
water or heater blankets.
Systems with open drive compressors are prone to leak
where? - ....ANSWER...At the shaft seal.
What does ASHRAE standard 15 require? - ....ANSWER...A
refrigerant monitor that will sound and alarm and
automatically start a ventilation system in equipment
rooms before the refrigerant concentration reaches the
TLV-TWA.
,TLV-TWA - ....ANSWER...Threshold Limit Value, Time
Weighted Average
A-1 Group Refrigerants only require what? -
....ANSWER...Oxygen Deprivation Sensor
All "B" rated refrigerants require what? -
....ANSWER..."Refrigerant Specific" Mechanical Room
Sensor.
What are Cooling Towers? - ....ANSWER...They are heat
removal devices used to transfer process waste heat to the
atmosphere.
What is the maximum test pressure to use for pressurizing
Type III centrifugal systems with nitrogen? -
....ANSWER...10 psig
Enough vapor has entered the system and you may begin
charging liquid refrigerant when the refrigerant saturation
temperature increases to? - ....ANSWER...36F
, What date was the sale of CFC's & HCFC's restricted to
technicians certified in refrigerant recovery? -
....ANSWER...November 14, 1994
1989-
Montreal Protocol
July 1 1992-
Violation to vent CFCs or HCFCs
Nov 15 1993-
Recovery/Recycling equipment must be certified and labeled
by EPA
AND
Before this date recovery equipment needed to be capable of
removing 80% of the refrigerant, w or wo compressor, or 4
in Hg
After this date recovery equipment needs to be capable of
removing 90%, or 80% without working compressor, or 4 in
Hg
AND
400 QUESTIONS WITH DETAILED VERIFIED
ANSWERS / EXAM QUESTIONS WILL COME
FROM HERE (100% CORRECT ANSWERS/ A+
GRADED
When the refrigerant is put back into a Type III chiller,
following recovery and system repair, where is it added? -
....ANSWER...The charging valve on the evaporator.
What method is used to find suspected water tube leaks in
chillers? - ....ANSWER...Hydrostatic (tube) test
What temperature should be attained when removing oil
from a low pressure system to ensure a lower level of
refrigerants in the oil? - ....ANSWER...130-Degrees F
The typical design burst pressure for a rupture disc is what? -
....ANSWER...15 PSIG
,Excessive moisture collection in the purge unit can indicate
what? - ....ANSWER...Tube Leakage
Vacuum pumps need to be capable of pulling what level of
vacuum? - ....ANSWER...500 microns
All refrigeration systems containing more than 50 lbs. of
refrigerant must be repaired when the annual leak rate
exceeds___? - ....ANSWER...35%
The most efficient method of leak checking a charged low-
pressure system is to use? - ....ANSWER...Controlled hot
water or heater blankets.
Systems with open drive compressors are prone to leak
where? - ....ANSWER...At the shaft seal.
What does ASHRAE standard 15 require? - ....ANSWER...A
refrigerant monitor that will sound and alarm and
automatically start a ventilation system in equipment
rooms before the refrigerant concentration reaches the
TLV-TWA.
,TLV-TWA - ....ANSWER...Threshold Limit Value, Time
Weighted Average
A-1 Group Refrigerants only require what? -
....ANSWER...Oxygen Deprivation Sensor
All "B" rated refrigerants require what? -
....ANSWER..."Refrigerant Specific" Mechanical Room
Sensor.
What are Cooling Towers? - ....ANSWER...They are heat
removal devices used to transfer process waste heat to the
atmosphere.
What is the maximum test pressure to use for pressurizing
Type III centrifugal systems with nitrogen? -
....ANSWER...10 psig
Enough vapor has entered the system and you may begin
charging liquid refrigerant when the refrigerant saturation
temperature increases to? - ....ANSWER...36F
, What date was the sale of CFC's & HCFC's restricted to
technicians certified in refrigerant recovery? -
....ANSWER...November 14, 1994
1989-
Montreal Protocol
July 1 1992-
Violation to vent CFCs or HCFCs
Nov 15 1993-
Recovery/Recycling equipment must be certified and labeled
by EPA
AND
Before this date recovery equipment needed to be capable of
removing 80% of the refrigerant, w or wo compressor, or 4
in Hg
After this date recovery equipment needs to be capable of
removing 90%, or 80% without working compressor, or 4 in
Hg
AND
