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Equipment practice questions

28 questions from the epa 609 (vehicle a/c) practice test.

Equipment practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

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Sample questions

SAE J2788 is the standard for equipment that recovers, recycles and recharges

  1. R-12
  2. R-1234yf
  3. R-134a
  4. R-744
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C. R-134a

J2788 covers R-134a recovery/recycling/recharging machines. R-1234yf machines are built to J2843, and the old R-12 machines to J1990.

Reference: SAE J2788; 40 CFR Part 82 Subpart B, Appendix C

SAE J2843 is the standard for equipment that recovers, recycles and recharges

  1. R-134a
  2. R-12
  3. R-152a
  4. R-1234yf
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D. R-1234yf

J2843 covers machines for R-1234yf and includes design features for a mildly flammable refrigerant. J2788 is the R-134a counterpart.

Reference: SAE J2843; 40 CFR Part 82 Subpart B

A recovery/recycling/recharging machine built to SAE J2788 must be able to recover at least what share of the refrigerant in the system?

  1. 70 percent
  2. 80 percent
  3. 95 percent
  4. 100 percent
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C. 95 percent

J2788 raised the bar to 95 percent recovery, because older machines often left a large part of the charge in the system. No machine can guarantee 100 percent.

Reference: SAE J2788

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