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EPA 608 Certification, EPA UPDATE ACTUAL EXAM ALL QUESTIONS AND CORRECT DETAILED ANSWE
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EPA 608 Certification, EPA UPDATE ACTUAL EXAM ALL QUESTIONS AND CORRECT DETAILED ANSWE
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EPA 608 Certification, EPA 608 exam 2024The EPA definition of a small appliance includes: - answer>>Products manufactured, charged, and
hermetically sealed in a factory with 5 pounds of refrigerant or less.
What is the EPA requirement for leak repair for small appliances? - answer>>Leaks should be repaired
whenever possible.
Which type of leak detector works by drawing the vapor into the system and heating it? -
answer>>Electronic leak detector
Before beginning a refrigerant recovery procedure, it is necessary to know: - answer>>The type of
refrigerant that is in the system.
If a reclamation facility receives a tank of refrigerant, they will ________ - answer>>refine to new
refrigerant specifications.
The only way to measure refrigerant pressure temperature relationship accurately, is at a: -
answer>>Stable, known temperature.
After the installation of any type of system, the unit should first be _____ - answer>>pressurized with an
inert gas (nitrogen) and leak checked.
When performing refrigerant system service on a unit that has a receiver/storage tank, refrigerant
should be placed in the _____ - answer>>receiver/storage tank.
Although recovering refrigerant in the vapor phase will minimize the loss of oil, recovering as much as
possible in the liquid phase will _______ - answer>>reduce recovery time.
After recovery, refrigerant may be: - answer>>Returned to the appliance from which it was removed or
to another appliance owned by the same person without being recycled or reclaimed.
Disposable cylinders must be: - answer>>Discarded.
It is necessary to frequently check and change the recycling machine's: - answer>>Oil and filter.
,Quick couplers, self-sealing hoses, and hand valves should be used to _____ - answer>>minimize
refrigerant release when hoses are connected/disconnected.
A major repair involves removal of _______ - answer>>an auxiliary heat exchanger coil.
Because a low-pressure system operates below atmospheric pressure (vacuum), leaks in the gasket or
fittings will _______ - answer>>cause air and moisture to enter the system.
What can be used to pressurize a system for the purpose of opening the system for a non-major repair?
(Type III) - answer>>Controlled hot water
A recovery unit's high pressure cut-out is set for (Psig for Type III): - answer>>10 psig when evacuating
the refrigerant from a low pressure chiller (rupture disc at 15psig)
A substantial amount of vapor will remain in the appliance after all the liquid is removed. An average
350 ton R-11 chiller at 0 psig still contains what amount of vapor? - answer>>100 pounds of vapor
When removing oil from a low-pressure system, a temperature of what must be attained? -
answer>>130 degrees F
Refrigerant recovery from a system using R-11 or R-123 starts with recovery of (Type III): -
answer>>Liquid removal, followed by vapor.
Water must be circulated through the tubes when evacuating refrigerant in order to prevent ________ -
answer>>freezing of the water.
Most low-pressure recovery machines utilize a water-cooled condenser that is connected to the
________ - answer>>municipal water supply.
Before charging with liquid, how much pressure does an R-11 refrigeration system require (vapor
pressure), and how much saturation temperature? - answer>>16.9" hg. vacuum or 36 degrees F.
, Two refrigerants are not allowed to collect into one recovery cylinder because: - answer>>Recovering
two refrigerants back from mixture is not possible
What is one refrigerant used in low pressure refrigerated appliances? - answer>>R-123
Low pressure appliances uses a refrigerant with a liquid phase saturation pressure below 45 psia at
104°F.
Nitrogen reacts with hydrogen to form what? - answer>>Ammonia.
The ______ connects the condenser to the expansion device: - answer>>Liquid line
Recovery and recycling equipment intended for use manufactured after
_____ must be certified to meet the requirements of ARI 740. - answer>>Nov
15, 1993
Electronic leak detector works on the principle that when halogen vapor is heated, it increases the
positive ion concentration thereby increasing the conductivity of the air sample drawn between the ion
emitter and collector (anode and cathode). This increase in positive ion conductivity is magnified using
electrical circuit so that audio or visual signal is produced.
_____ breaks down the CFCs and frees the chlorine ion at stratosphere: - answer>>Ultraviolet radiation
If the vacuum pump used is too large, water removal from the system will become easier or more
difficult? - answer>>More difficult.
If large vacuum pump is used, vacuum in the system drops very fast causing the evaporating water to
cool and freeze rapidly. This results in removing water from the system more difficult.
Motor Vehicle Air Conditioning (MVAC) service technicians are governed under EPA _____ section: -
answer>>609
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