1|Page
EPA 608 CERTIFICATION EXAM QUESTIONS
WITH COMPLETE SOLUTIONS GUARANTEED
PASS 2025/2026
To Convert From Inches of Mercury To Millimeters of Mercury Absolute
the Inches of Mercury by 25.4 and the result from 760
Divide, Subtract Multiply, Add Multiply, Subtract
Divide, Add - ANSWER->Multiply, Subtract
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? -
ANSWERM>Hydrostatic (tube) test
,2|Page
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.
,3|Page
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.
, 4|Page
What is the maximum test pressure to use for pressurizing Type III
centrifugal systems with nitrogen? - ANSWER->10 psig
The objective of the Clean Air Act is to protect what? - ANSWER->The
earth's stratosphere.
HFC's - ANSWER->HydroFlouroCarbon's
CFC's - ANSWER->ChloroFluoroCarbon's
ODP - ANSWER->Ozone Depletion Potential
EPA 608 CERTIFICATION EXAM QUESTIONS
WITH COMPLETE SOLUTIONS GUARANTEED
PASS 2025/2026
To Convert From Inches of Mercury To Millimeters of Mercury Absolute
the Inches of Mercury by 25.4 and the result from 760
Divide, Subtract Multiply, Add Multiply, Subtract
Divide, Add - ANSWER->Multiply, Subtract
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? -
ANSWERM>Hydrostatic (tube) test
,2|Page
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.
,3|Page
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.
, 4|Page
What is the maximum test pressure to use for pressurizing Type III
centrifugal systems with nitrogen? - ANSWER->10 psig
The objective of the Clean Air Act is to protect what? - ANSWER->The
earth's stratosphere.
HFC's - ANSWER->HydroFlouroCarbon's
CFC's - ANSWER->ChloroFluoroCarbon's
ODP - ANSWER->Ozone Depletion Potential
