Epa 608 test final exam

EPA 608 TEST FINAL EXAM | NEWEST l l l l l l




ACTUAL EXAM QUESTIONS AND VERIFIE l l l l




D ANSWERS GRADED A+ | 100%PASS | 20
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24 UPDATE!! l




What chemicals does the Montreal Protocol control? -
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✔✔✔ CorrectAnswer > a. chlorofluorocarbons (CFCs), halons,
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b. carbon tetrachloride l




c. methyl chloroform l




d. All the abovel l




What will need to happen if the oil has been contaminated by a burnout? -
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✔✔✔ Correct Answer > a. Triple evacuate the system
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b. Install a permanent filter-drier
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c. Conduct a deep vacuum before recharging l l l l l




d. All the abovel l




Will the gases in a ternary blend leak at the same rate and why or whynot? -
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✔✔✔ Correct Answer > They leak at different rates because they retain th
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eir different vapor
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pressures

,How is recovery different from recycling? -
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✔✔✔ Correct Answer >Recycle is to clean refrigerant for immediate reus
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e then recover is to remove refrigerant in any condition from a system and st
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ore


When was the CFC phase out date? - ✔✔✔ Correct Answer >
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December 31, 1995 l l




Where do CFC refrigerants come from for equipment servicing of oldersyste
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ms? - ✔✔✔ Correct Answer > Recovery and recycling
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What must be done before scrapping a refrigerant container? -
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✔✔✔Correct Answer > Recover to (0 psig) or lower and rendered useles
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s


What must be done before disposing of an appliance containing CFCs orHCF
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Cs? - ✔✔✔ Correct Answer > Refrigerant must be recovered
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Who is responsible for removing refrigerants from a system that isbeing
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disposed of? - ✔✔✔ Correct Answer > Final person in the disposalchain
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, .What type of oil is used in R-134a and what oils will mix with it? -
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✔✔✔ Correct Answer > Ester based oils and Ester based oils do notmix wit
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h other oils
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Are there "drop-in" replacements for R-12 systems and if not, why? -
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✔✔✔ Correct Answer > a. There is no "drop-in" replacement gas forR-12
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b. New refrigerants are incompatible with the oils and lubricants usedin R
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-12
c. 134A uses a different oil than R-12 l l l l l l




d. All the above l l




What does a compressor compress? -
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✔✔✔ Correct Answer > Lowpressure, low temperature vapor
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Explain how cooling of a space occurs in a refrigeration cycle -
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✔✔✔Correct Answer > Heat is removed from inside the building and is
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deposited outside
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the buildingl




Will refrigerant migrate to the crank case in a compressor? -
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✔✔✔ Correct Answer > Refrigerant will migrate towards the compres
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sorcrank case while
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the oil will not
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