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EPA 608 CERTIFICATION EXAM QUESTIONS AND ANSWERS 2024
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EPA 608 CERTIFICATION EXAM QUESTIONS AND ANSWERS 2024
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EPA 608 CERTIFICATION EXAMThe displacement of oxygen in a room by the denser refrigerant. - ANSWERS-
Asphyxia
A blend of two or more components whose equilibrium vapor phase and liquid
phase composition are the same at a given pressure. These refrigerants are given
a 500-series ASHRAE designation and behave like a single refrigerant. They can be
charged as a liquid or vapor. - ANSWERS-Azeotrope
The temperature at which the non-azeotropic blend first begins to evaporate
(boil). - ANSWERS-Bubble Point
A passive throttling device comprised of a very small diameter long tube located
upstream of the evaporator that drops the pressure in the system, causing
refrigerant to flash into a two- phase mixture. It does not actively control the
pressure drop to maintain a prescribed superheat at the exit of the evaporator. -
ANSWERS-Capillary Tube
Any device that contains and uses a refrigerant for household or commercial
purposes, including any air conditioner, refrigerant, chiller, or freezer. EPA
interprets this definition to include all air-conditioning and refrigeration
equipment except units designed and uses exclusively for military purposes. -
ANSWERS-Appliance
,Refrigerant that have an ozone depletion potential (ODP) greater than 0.2, and
consist of all chlorofluorocarbons (CFCs). - ANSWERS-Class I Refrigerant
Refrigerants that have an ozone depletion potential (ODP) of less than 0.2 and
consist of all hydrochlorofluorocarbons (HCFCs). - ANSWERS-Class II Refrigerant
Refrigerant appliances used in retail food and cold storage warehouse sectors.
"Retail food" includes the refrigeration equipment found I. Supermarkets,
convenience stores, restaurants, and other food services establishments. "Cold
storage" includes the equipment used to store meat, produce, fairly products, and
other perishable goods. All of this type of equipment contains large refrigerant
charges, typically more than 75 pounds. - ANSWERS-Commercial Refrigeration
A substance formed by a union of two or more elements in a definite proportion
by weight. - ANSWERS-Compound
to remove water from the system. - ANSWERS-Dehydrate
The evacuation of a system down to a low vacuum, typically below 500microns,
with the goal of removing non-condensable gases as well as evaporating and
removing water from the system. - ANSWERS-Deep vacuum
The temperature at which the non-azeotropic blend first begins to condense. -
ANSWERS-Dew Point
,The process leading to and including and of the following - the discharging,
depositing, dumping, or placing of any discarded appliance into land or water. -
the disassembly of any appliance for discharging, depositing, dumping, or placing
of it's discarded component parts into or on any land or water. - The disassembly
of any appliance for reuse of its components parts. - ANSWERS-Disposal
An electronic vacuum gauge that displays the vacuum level directly in microns
and is the only accurate field method to determine the evacuation level of a deep
vacuum. - ANSWERS-Electronic Vacuum Gauge or Micron Gauge
The process of extracting any air, non-condensable gases, or water from the
system and thereby reducing the pressure to some value below 0 psig. -
ANSWERS-Evacuation
The abbreviation for an Electronic Expansion Valve, a throttling device located
upstream of the evaporator, that actively controls the pressure drop ( via
electrical feedback from a temperature sensor) to maintain a prescribed
superheat at the exit of the evaporator. - ANSWERS-EXV
November 14, 1994 - ANSWERS-What date was the sale of CFC's & HCFC's
restricted to technicians certified in refrigerant recovery?
Memorize it, ya'll. - ANSWERS-989-
Montreal Protocol1
, 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
Required level of evacuation for Low Pressure appliances before this date was 25
inches Hg, after this date 25 mm Hg
Nov 14 1994-
Certification needed to service, maintain, or dispose of appliances with
refrigerants AND
Sale of CFC and HCFC refrigerants restricted to certified techs
Nov 15 1995-
Violation to vent HFCs
Dec 31 1995-
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