HVAC 2023 EPA 608 CORE Type 123 Exam Questions and Answers
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Course
NURSING 706
Institution
NURSING 706
HVAC 2023 EPA 608 CORE Type 1,2,3 Exam Questions and Answers
What characteristic or characteristics of CFCs make them more likely than other chlorine compounds to reach the stratosphere?
Each chlorine atom in the stratosphere can destroy how many ozone molecules?
Which refrigerant contains a CFC...
5). Which refrigerant is a chlorine free refrigerant?
Ans: HFC R 134A
6). What is the result damage to the ozone layer?
Ans: Increases in human skin cancer
7). According to the epa, chlorine in the stratosphere is believed to come primarily from the
cfcs rather than from volcanoes because
Ans: -) The rise in the amount of chlorine measured in the stratosphere over the past 2
decades matches the rise of chlorine which has different natural sources of chlorune
overthe same period
-) The rise of chlorine in the statosphere matches the rise in CFCs over the same period
-) samples of air taken over erupting volcanoes shows that volcanoes contribute a small
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, amount of chlorine in the stratosphere compared to CFCs
-) ALL OF THE ABOVE
8). Which is a violation of the epa clean air act?
Ans: -) falsifying or failing to keep required records
-) failing to keep evacuation levels before opening or disposing of appliances
-) knowingly releasing HFC's, HCFCs or CFC refrigerants
-) ALL OF THE ABOVE
9). Discarding of disposable cylinders is accomplished by
Ans: Assuring that all refrigerant is recovered and that the cylinders are rendered
useless then recycle the metal
10). How much money can be awarded to a person who supplies information leading to a
conviction against the technician who is intentionally venting refrigerants or violatingsome
other provision of the epa clean air act
Ans: $10,000
11). Cfc's will no longer be manufactured or imported into the u.s. after what year?
Ans: 1995
12). Since july 1, 1992 it has been illegal to:
Ans: Knowingly releasing HCF or HCFC refrigerants in the U.S.
13). Which compounds are controlled by the montreal protocol?
Ans: -) chloric floric carbons
-) hydro chloric carbons
-) halons
-) all of the above
14). Epa regulations cover all ac and refrigeration equipment when containing what?
Ans: Any refrigerant or refrigerant substitute
15). The syntetic substitute currently usedwith blends containing hcfcs is:
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, Ans: Alcobenzine
16). What is the significance of atheotropic mixture:
Ans: The mixture combines to act as a single compound refrigerant
17). Cooling occurs in a vapor compression refrigeration system when:
Ans: Refrigerant liquid boils into a vapor
18). Ozone depletion in the stratosphere is what type of problem:
Ans: Its a GLOBAL problem
19). The definition of recover is:
Ans: To remove refrigerant in any condition from a system and store it an external
container without neccesarily testing it
20). Which of the following leak detection methods is considered by the epa to be the effective
for locating the general area of small leaks?
Ans: Electronic ultrasonic testers
21). Recovery during low ambient temperatures will:
Ans: Slow the recovery process
22). During dehydration of a refrigeration system the refrigeration system is heated to:
Ans: Decrease dehydration time
23). To determine the safe pressure for leak testing one should use:
Ans: Low side test data plate value
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, 24). Care should be used to avoid over filling refrigerant storage cylinders because:
Ans: The internal pressure of the cylinders may rise and cause an explosion
25). When transporting cylinders containing used refrigerants dot requires that you:
Ans: attach DOT classification tags
26). What is the significance of an azeotropic mixture?
Ans: The mixture combines to act like a single component refrigerant
27). Cf cs are more likely to reach the stratosphere than other chlorine-containing compounds
because___________.
Ans: They are chemically very stable
28). Chlorofuorocarbons, or cfcs, consist ofwhich of the following chemicals?
Ans: Chlorine, fluorine and carbon
29). Which compound are the most damaging to the stratospheric ozone layer and have the
highest ozone depletion potential rating?
Ans: CFCs
30). ________ test methods are assumed by the epa as the most effective methods for locating
the general area of small leaks.
Ans: Electronic and ultrasonic
31). If a reclamation company is shipping a cylinder containing mixed refrigerants they may
______.
Ans: Agree to destroy the refrigerant but typically a substantial fee is charged
32). One chlorine atom in the stratosphere is capable of destroying how many ozone
molecules?
Ans: 100,000
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