Exam (elaborations)
epa 608 universal 2023/2024
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epa 608 universal 2023/2024
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epa 608 universalRefrigeration technicians who violate the Clean Air Act can: - - ANSLose their EPA certification,
be fined, be required to appear in Federal court.
After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come
from: - - ANSrecovery and recycling.
Refrigerant that is recovered can be returned to: - - ANSthe same system or other systems
owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - . - ANShas 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: - -
ANSrevocation of the technicians certification.
What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other
compounds containing chlorine? - - ANSRefrigerants 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: - - ANSthe vacuum indicator shows you have
reached and held the required finished vacuum.
Disposable refrigerant containers are used for ______ - ANSvirgin refrigerant
Which refrigerant is an HCFC? - - ANSR-123, R-124, R-22
What statement is true about an azeotropic refrigerant mixture? - - ANSIt 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? - - ANSIt 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: - -
ANS0 psig.
, Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color
coded: - Red. - ANS
In general, blended refrigerants should be charged: - - ANSas a liquid.
Blended refrigerants leak from a system: - - ANSin uneven amounts due to different vapor
pressures.
Which of the following gases help form the earth's protective shield? - Stratospheric Ozone -
ANS
In a refrigerant system, the device that changes a low pressure vapor to a high pressure vapor
is the: - compressor. - ANS
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
matches the rise in the amount of fluorine, which has different natural sources than chlorine;
The rise in the amount of chlorine in the stratosphere matches the rise in CFC emissions; Air
samples taken from the stratosphere over erupting volcanoes show that volcanoes contribute a
small quantity of chlorine to the stratosphere when compared to CFCs; - ANS
Which atom of the CFC molecule causes ozone depletion? - chlorine - ANS
The ozone layer protects the earth from: - ultraviolet radiation from the sun. - ANS
When using with any solvent, cleaner, chemical or refrigerant, you should review: - material
safety data sheets. - ANS
An award of up to what amount may be paid to a person supplying information that leads to a
penalty against a technician who is intentionally venting? - 10,000 - ANS
The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs.
- ANS
Which refrigerant is an HCFC? - R-123, R-22, R-124 - ANS
What is one of the most serious results of damage to the ozone layer? - increases in human
skin cancer - ANS
Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 -
ANS
To determine the maximum allowable pressure to use when checking a system, check: - the
design pressure on the equipment nameplate - ANS
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