EPA 608 CORE Questions with Correct Solutions

EPA 608 CORE Questions with Correct Solutions


Question:
1. What characteristic or characteristics of CFCs make them more likely than other chlorine
compounds to reach the stratosphere?

Answer:
Dont disolve iin water


Question:
2. Each chlorine atom in the stratosphere can destroy how many ozone molecules?

Answer:
100,000 ozone molecules


Question:
3. Which refrigerant contains a CFC? R500, R12, R113 or R11?

Answer:
Theyre all CFC's


Question:
4. HYDROCHLORIC FLORICCARBON (HCFC) refrigerant contain?

Answer:
Hydrogen, chlorine, flourine and carbon


Question:
5. Which refrigerant is a chlorine free refrigerant?

Answer:
HFC R 134A


Question:
6. What is the result damage to the ozone layer?

Answer:
Increases in human skin cancer


Question:
7. According to the EPA, chlorine in the stratosphere is believed to come primarily from the
CFCs rather than from volcanoes because

,Answer:
-) 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 amount of chlorine in the stratosphere compared to CFCs -) ALL OF THE ABOVE


Question:
8. Which is a violation of the EPA clean air act?

Answer:
-) 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


Question:
9. Discarding of disposable cylinders is accomplished by

Answer:
Assuring that all refrigerant is recovered and that the cylinders are rendered useless then
recycle the metal


Question:
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

Answer:
$10,000


Question:
11. CFC's will no longer be manufactured or imported into the U.S. after what year?

Answer:
1995


Question:
12. Since July 1, 1992 it has been illegal to:

Answer:
Knowingly releasing HCF or HCFC refrigerants in the U.S.


Question:
13. Which compounds are controlled by the Montreal protocol?

,Answer:
-) chloric floric carbons -) hydro chloric carbons -) halons -) all of the above


Question:
14. EPA regulations cover all AC and refrigeration equipment when containing what?

Answer:
Any refrigerant or refrigerant substitute


Question:
15. The syntetic substitute currently usedwith blends containing HCFCs is:

Answer:
Alcobenzine


Question:
16. What is the significance of atheotropic mixture:

Answer:
The mixture combines to act as a single compound refrigerant


Question:
17. Cooling occurs in a vapor compression refrigeration system when:

Answer:
Refrigerant liquid boils into a vapor


Question:
18. Ozone depletion in the stratosphere is what type of problem:

Answer:
Its a GLOBAL problem


Question:
19. The definition of recover is:

Answer:
To remove refrigerant in any condition from a system and store it an external container
without neccesarily testing it


Question:
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?

Answer:
Electronic ultrasonic testers

, Question:
21. Recovery during low ambient temperatures will:

Answer:
Slow the recovery process


Question:
22. During dehydration of a refrigeration system the refrigeration system is heated to:

Answer:
Decrease dehydration time


Question:
23. To determine the safe pressure for leak testing one should use:

Answer:
Low side test data plate value


Question:
24. Care should be used to avoid over filling refrigerant storage cylinders because:

Answer:
The internal pressure of the cylinders may rise and cause an explosion


Question:
25. When transporting cylinders containing used refrigerants DOT REQUIRES that you:

Answer:
attach DOT classification tags


Question:
26. What is the significance of an azeotropic mixture?

Answer:
The mixture combines to act like a single component refrigerant


Question:
27. CF Cs are more likely to reach the stratosphere than other chlorine-containing
compounds because___________.

Answer:
They are chemically very stable


Question:
28. Chlorofuorocarbons, or CFCs, consist ofwhich of the following chemicals?