EPA 608 UNIVERSAL COMPREHENSIVE
QUESTIONS AND SOLUTIONS
◉ After 1995, any supplies of CFC refrigerants to service existing
units in the USA can only come from: -
Answer: recovery and recycling.
◉ Refrigerant that is recovered can be returned to: -
Answer: the same system or other systems owned by the same
person without restriction.
◉ Refrigerant can not be called "reclaimed" unless it: - .
Answer: has been chemically analyzed and the refrigerant meets
the ARI-700 standard.
◉ The EPA can require a technician to demonstrate their ability to
perform proper procedures for recovering and/or recycling
refrigerant. Failure to demonstrate competency can result in: -
Answer: revocation of the technicians certification.
◉ What characteristic(s) of CFCs make them more likely to reach
the stratosphere than most other compounds containing chlorine?
-
Answer: Refrigerants that contain chlorine but not hydrogen are
so stable that they do not break down in the lower atmosphere
,after being released. The chlorine or bromine reacts with the
ozone, causing it to change back to oxygen, thus destroying the
ozone layer.
◉ A system is considered dehydrated when: -
Answer: the vacuum indicator shows you have reached and held
the required finished vacuum.
◉ Disposable refrigerant containers are used for ______
Answer: virgin refrigerant
◉ Which refrigerant is an HCFC? -
Answer: R-123, R-124, R-22
◉ What statement is true about an azeotropic refrigerant
mixture? -
Answer: It is a mixture that acts like a single-component
refrigerant over its entire range.
◉ Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons
(HCFCs) have which of the following in common? -
Answer: It is a mixture that acts like a single-component
refrigerant over its entire range.
, ◉ To scrap a disposable cylinder, the internal cylinder pressure
should be reduced to at least: -
Answer: 0 psig.
◉ Manifold gauge sets are often color coded, when this is done,
the high pressure gauge is color coded: - Red.
Answer:
◉ In general, blended refrigerants should be charged: -
Answer: as a liquid.
◉ Blended refrigerants leak from a system: -
Answer: in uneven amounts due to different vapor pressures.
◉ Which of the following gases help form the earth's protective
shield? - Stratospheric Ozone
Answer:
◉ In a refrigerant system, the device that changes a low pressure
vapor to a high pressure vapor is the: - compressor.
Answer:
◉ Data shows that chlorine in the stratosphere comes mainly
from CFCs rather than from natural sources such as volcanoes
because: - The rise in the amount of chlorine in the stratosphere
QUESTIONS AND SOLUTIONS
◉ After 1995, any supplies of CFC refrigerants to service existing
units in the USA can only come from: -
Answer: recovery and recycling.
◉ Refrigerant that is recovered can be returned to: -
Answer: the same system or other systems owned by the same
person without restriction.
◉ Refrigerant can not be called "reclaimed" unless it: - .
Answer: has been chemically analyzed and the refrigerant meets
the ARI-700 standard.
◉ The EPA can require a technician to demonstrate their ability to
perform proper procedures for recovering and/or recycling
refrigerant. Failure to demonstrate competency can result in: -
Answer: revocation of the technicians certification.
◉ What characteristic(s) of CFCs make them more likely to reach
the stratosphere than most other compounds containing chlorine?
-
Answer: Refrigerants that contain chlorine but not hydrogen are
so stable that they do not break down in the lower atmosphere
,after being released. The chlorine or bromine reacts with the
ozone, causing it to change back to oxygen, thus destroying the
ozone layer.
◉ A system is considered dehydrated when: -
Answer: the vacuum indicator shows you have reached and held
the required finished vacuum.
◉ Disposable refrigerant containers are used for ______
Answer: virgin refrigerant
◉ Which refrigerant is an HCFC? -
Answer: R-123, R-124, R-22
◉ What statement is true about an azeotropic refrigerant
mixture? -
Answer: It is a mixture that acts like a single-component
refrigerant over its entire range.
◉ Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons
(HCFCs) have which of the following in common? -
Answer: It is a mixture that acts like a single-component
refrigerant over its entire range.
, ◉ To scrap a disposable cylinder, the internal cylinder pressure
should be reduced to at least: -
Answer: 0 psig.
◉ Manifold gauge sets are often color coded, when this is done,
the high pressure gauge is color coded: - Red.
Answer:
◉ In general, blended refrigerants should be charged: -
Answer: as a liquid.
◉ Blended refrigerants leak from a system: -
Answer: in uneven amounts due to different vapor pressures.
◉ Which of the following gases help form the earth's protective
shield? - Stratospheric Ozone
Answer:
◉ In a refrigerant system, the device that changes a low pressure
vapor to a high pressure vapor is the: - compressor.
Answer:
◉ Data shows that chlorine in the stratosphere comes mainly
from CFCs rather than from natural sources such as volcanoes
because: - The rise in the amount of chlorine in the stratosphere
