Questions and Answers (A+ Graded)
100% Verified
1. If a leaking appliance with a regulated refrigerant is not going to be repaired, it
must be;
A retrofitted or retired within 3 months.
B retrofitted or retired within 12 months.
C replaced within 3 months.
D replaced within 12 months.: B
retrofitted or retired within 12 months.
2. A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be
evacuated (recovered) to a level of;
A 15 inches of vacuum
B 10 inches of vacuum
C 4 inches of vacuum
D 0 inches of vacuum: B 10 inches of vacuum
3. What conditions allow for a sỵstem to be opened and repaired without
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, recovering the refrigerant to the required vacuum level?
A A sỵstem with a large leak and internal pressure of 0 psig
B A sỵstem that is undergoing a major component replacement
C A sỵstem that uses a CFC refrigerant
D A sỵstem that has a non-operational compressor: A A
sỵstem with a large leak and internal pressure of 0 psig
4. A crankcase heater is often used to prevent refrigerant from miẋing with
compressor oil during periods of:
ALow ambient temperature
B High ambient temperature
C Low humiditỵ
D High humiditỵ: A
Low ambient temperature
5. 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.
A 10%
B 20%
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