Industrial process and refrigeration units with a 50 pound charge or more with an annualized leak rate of _____ or more must have leaks
... [Show More] repaired.
35
Unless plans are made to replace a system exceeding the maximum leak, repairs must be made in;
30 days
Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as;
a 1
All Refrigeration & HVAC systems are protected by a;
pressure relief valve
A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under;
ASHRAE Standard 15
Non-condensables will cause;
High discharge pressure
A crankcase heater is often used to prevent refrigerant from migrating to the oil during periods of:
Low ambient temperature
EPA regulations state that maintenance, service or repair involving the removal of the following component is a "major repair"
Pressure switch
Which of the following refrigerants is an HCFC?
R-22
What can be done with the refrigerant trace gas and nitrogen after the leak is found?
Release to the atmosphere.
High pressure appliances can be evacuated to atmospheric pressure (O psig) when;
There is a leak
If a high pressure appliance containing 100 lbs. of an HCFC OTHER THAN R-22 refrigerant Recovery and/or Recycling equipment manufactured after November 15, 1993 must be evacuated to a level of;
10 inches of vacuum
When dehydrating a system it should be evacuated to a level of;
500 Microns
When recovering from a system with a refrigerant leak, recover to a level of;
0 Psig
When using a recovery system manufactured after November 15, 1993 on a system containing 100 lbs. of R-502 must be evacuated to;
10 inches of Mercury
If a high pressure appliance containing 210 lbs. of R-22 refrigerant Recovery and/or Recycling equipment manufactured before November 15, 1993 must be evacuated to a level of;
4 inches of vacuum
What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level?
a system with a large leak and system pressure of atmospheric
A new split system should be checked for leaks by;
pressurizing the system with a few ounces of R-22 and an inert gas.
An overcharged system will operate;
less efficiently.
Refrigerant should be removed from the condenser outlet if the condenser is;
Below the receiver
EPA regulations require that all Commercial and Industrial Process Refrigeration containing more than 50lbs. of refrigerant MUST be repaired when the annual leak rate exceeds;
35%
Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by;
EPA approved laboratory
What happens to a refrigerant that is above the saturation temperature?
It remains in a vapor state.
Which of the following refrigerant is considered high or very high pressure refrigerant?
HFC-134a
Air conditioning system short cycling is normally caused by;
the system being oversized for the home
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