This file contains ALL of the study questions used in the EPA 608 exam. Tests are usually made up of 25 random questions from each of the
following 4 question pools. Total combined questions: 367
These questions and answers were extracted from QwikProducts (Mainstream Engineering) EPA 608 Certifi...
This file contains ALL of the study questions used in the EPA 608 exam. Tests are usually made up of 25 random questions from each of the
following 4 question pools. Total combined questions: 367
These questions and answers were extracted from QwikProducts (Mainstream Engineering) EPA 608 Certification software.
===
EPA Section 608 Study Questions Pool
Section: CORE
Questions 1-160
1. Refrigeration technicians who violate the Clean Air Act can:
A) lose their EPA certification.
B) be fined.
C) be required to appear in Federal court.
D) all of the above
Answer: D
2. After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from:
A) recovery and recycling.
B) solvent conversion.
C) European chemical manufacturers.
D) Third World chemical manufacturers.
Answer: A
3. Refrigerant that is recovered can be returned to:
A) the same system or other systems owned by the same person without restriction.
B) used in any system serviced that day
C) Sold as used refrigerant to other customers.
D) Called Reclaimed if a filter-drier was used during recovery.
,Answer: A
4. Refrigerant can not be called "reclaimed" unless it:
A) was processed in a reclaiming machine.
B) has been chemically analyzed and the refrigerant meets the ARI-700 purity standard.
C) is recovered from a system less than 1 year old.
D) is recovered from a system still under warrantee.
Answer: B
5. 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:
A) revocation of the technician's certification.
B) seizure of the technician's recovery or recycling equipment.
C) seizure of any refrigerant purchased by the technician which is still in his/her possession.
D) mandatory attendance at a refrigerant training camp.
Answer: A
6. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?
A) 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 ozone, causing it to change back to oxygen, thus destroying the ozone layer.
B) CFCs are lighter than other damaging compounds, making it easier for them to float upward when released.
C) CFCs are attracted to the static in the atmosphere.
D) CFCs are attracted to dust in the atmosphere.
Answer: A
7. A system is considered dehydrated when:
A) the vacuum indicator shows you have reached and held the required finished vacuum.
B) the vacuum pump has run at least 7 hours.
C) the manifold suction gauge has held a 30 in. hg./760 mm vacuum for 3 hours.
D) you are ready to leave for the day.
Answer: A
,8. Disposable refrigerant containers are used for _______ refrigerant.
A) recycled
B) recovered
C) virgin
D) both a and b
Answer: C
9. Which refrigerant is an HCFC?
A) R-124
B) R-134a
C) R-410A
D) R-12
Answer: A
10. What statement is true about an azeotropic refrigerant mixture?
A) It is always make from just two components.
B) It has a pressure-temperature curve identical to one of its components.
C) It is a mixture that is always made from at least three component refrigerants.
D) It is a mixture that acts like a single-component refrigerant over its entire range.
Answer: D
11. Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common?
A) They have identical ODP's.
B) They both contain hydrogen.
C) They have the same normal boiling points.
D) They must be recovered before opening or disposing of appliances.
Answer: D
12. To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least:
A) 0 psig.
, B) 15 psig.
C) 20 psig.
D) 28.8 psig.
Answer: A
13. Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded:
A) red.
B) white.
C) blue.
D) yellow.
Answer: A
14. In general, blended refrigerants should be charged:
A) as a vapor.
B) at very high temperatures.
C) as a liquid.
D) the same as any other refrigerant.
Answer: C
15. Blended refrigerants leak from a system:
A) faster than other refrigerants.
B) in uneven amounts due to different vapor pressures.
C) slower than other refrigerants.
D) only if the joint fails completely.
Answer: B
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