EPA 609 CERTIFICATION EVALUATION
COMPLETE QUESTIONS AND ANSWERS
GRADED A PLUS
●● 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:
COMPLETE QUESTIONS AND ANSWERS
GRADED A PLUS
●● 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:
