ESCO Questions and Correct Answers/ Latest Update / Already Graded

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ESCO Questions and Correct Answers/
Latest Update / Already Graded
When recovering refrigerant from a medium-pressure system with

more than 200 lbs. of refrigerant, recover to a level of;


Ans: 15" Hg




Refrigerant should be recovered from the condenser outlet if the

condenser is;


Ans: Below the receiver




A new split system should be checked for leaks by;


Ans: pressurizing the system with a few ounces of system refrigerant and

an inert gas.




Leaks must be repaired on industrial process and refrigeration units

with a 50-pound charge or greater when the annualized leak rate

reaches _____ or more.

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Ans: 30%




Refrigerants CFC-12, HCFC-22, and HFC-134a are all classified as

Type _______ substances.


Ans: A1




A high-pressure appliance containing less than 200 lbs. of an HCFC

or HFC refrigerant must be evacuated (recovered) to a level of;


Ans: 0 inches of vacuum




When using a recovery unit on a system containing 100 lbs. of R-410A

it must be evacuated to;


Ans: 0 inches of Mercury




A refrigerant sensor which will sound an alarm and automatically

start a ventilation system in occupied equipment rooms falls under

ASHRAE Standard;