1|Page
HVAC EPA 608 CERTIFICATION EXAM|| EPA 608
HVAC CERTIFICATION TEST WITH ALL
QUESTIONS AND 100% CORRECT ANSWERS
ALREADY GRADED A+|| LATEST AND COMPLETE
UPDATE 2025-2026 WITH EXPERT VERIFIED
SOLUTIONS|| ASSURED PASS!!!
How does a centrifugal purge unit work? ✔ A centrifugal purge unit
takes its suction from the top of the condenser, removes the air from
the system, and returns the refrigerant to the evaporator.
What are three visible ways to check for leaks in a low pressure
system?
✔ Excessive running of a purge system, continuous excessive
moisture in the purge unit could indicate a leak in the condenser or the
chiller barrel, high lead pressure.
What needs to be done to leak check a low pressure system? ✔
Increase the pressure in the system by use of controlled hot water or
heater blankets.
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What can happen if you exceed 10 psig while pressurizing the system?
✔ Can cause the rupture disc to fail
How should a water box be leak tested? ✔ Be certain water has been
removed, then place the leak detector probe in through the drain
valve.
What equipment should be used to leak test a tube? ✔ Hydrostatic
tube test kit What are the leak repair requirements for comfort
cooling appliances and commercial appliances containing 50lbs. or
more of refrigerant? ✔ The leak rate exceeds 15% in comfort cooling
appliances or the leak rate exceeds 35% in all commercial and
industrial process refrigeration
What are the typical pressure settings for rupture discs on low pressure
systems and recovery equipment? ✔ The rupture disc on a low
pressure system is set for 15 psig while the recovery unit's high
pressure cut-out is typically set for 10 psig in order to help prevent
damage to the low pressure
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How should a technician recover refrigerant from a system using R-11
or R-123? ✔ Remove the liquid first and recover the remaining vapor
After removal of liquid, about how much vapor will remain in the
system on a 350 ton R-11 chiller? ✔ 100lbs
How can you speed up the vapor recovery process on Type III systems?
✔ A heater on the recovery vessel side will help evacuate the vapor
faster
Where does the water typically come from in a water cooled
condensing system? ✔ Municipal water supply
What parts of the system should be drained of water before recovering
refrigerant?
✔ The water sides of the evaporator and condenser should be
drained prior to recovering the refrigerant
How should a technician treat the oil before removal and why? ✔ A
temperature of 130 degrees F should be attained first.
HVAC EPA 608 CERTIFICATION EXAM|| EPA 608
HVAC CERTIFICATION TEST WITH ALL
QUESTIONS AND 100% CORRECT ANSWERS
ALREADY GRADED A+|| LATEST AND COMPLETE
UPDATE 2025-2026 WITH EXPERT VERIFIED
SOLUTIONS|| ASSURED PASS!!!
How does a centrifugal purge unit work? ✔ A centrifugal purge unit
takes its suction from the top of the condenser, removes the air from
the system, and returns the refrigerant to the evaporator.
What are three visible ways to check for leaks in a low pressure
system?
✔ Excessive running of a purge system, continuous excessive
moisture in the purge unit could indicate a leak in the condenser or the
chiller barrel, high lead pressure.
What needs to be done to leak check a low pressure system? ✔
Increase the pressure in the system by use of controlled hot water or
heater blankets.
,2|Page
What can happen if you exceed 10 psig while pressurizing the system?
✔ Can cause the rupture disc to fail
How should a water box be leak tested? ✔ Be certain water has been
removed, then place the leak detector probe in through the drain
valve.
What equipment should be used to leak test a tube? ✔ Hydrostatic
tube test kit What are the leak repair requirements for comfort
cooling appliances and commercial appliances containing 50lbs. or
more of refrigerant? ✔ The leak rate exceeds 15% in comfort cooling
appliances or the leak rate exceeds 35% in all commercial and
industrial process refrigeration
What are the typical pressure settings for rupture discs on low pressure
systems and recovery equipment? ✔ The rupture disc on a low
pressure system is set for 15 psig while the recovery unit's high
pressure cut-out is typically set for 10 psig in order to help prevent
damage to the low pressure
, 3|Page
How should a technician recover refrigerant from a system using R-11
or R-123? ✔ Remove the liquid first and recover the remaining vapor
After removal of liquid, about how much vapor will remain in the
system on a 350 ton R-11 chiller? ✔ 100lbs
How can you speed up the vapor recovery process on Type III systems?
✔ A heater on the recovery vessel side will help evacuate the vapor
faster
Where does the water typically come from in a water cooled
condensing system? ✔ Municipal water supply
What parts of the system should be drained of water before recovering
refrigerant?
✔ The water sides of the evaporator and condenser should be
drained prior to recovering the refrigerant
How should a technician treat the oil before removal and why? ✔ A
temperature of 130 degrees F should be attained first.
