EPA Section 2 – Questions & Detailed Solutions (100%)
Industrial process and refrigeration units with a 50 pound charge or more
with an annualized leak rate of _____ or more must have leaks repaired.
Right Ans - 35%
Unless plans are made to replace a system exceeding the maximum leak,
repairs must be made in; Right Ans - 30 days
Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; Right
Ans - type A-1
All Refrigeration & HVAC systems are protected by a; Right Ans - Pressure
relief valve
A refrigerant sensor which will sound an alarm and automatically start a
ventilation system in occupied equipment rooms fall under; Right Ans -
ASHRAE Standard 15
Non-condensables will cause; Right Ans - High discharge pressure
A crankcase heater is often used to prevent refrigerant from migrating to the
oil during periods of: Right Ans - Low ambient tempurature
EPA regulations state that maintenance, service or repair involving the
removal of the following component is a "major repair" Right Ans -
compressor
What refrigerant can be used as a trace gas when checking for leaks? Right
Ans - R-22
What can be done with the refrigerant trace gas and nitrogen after the leak is
found? Right Ans - Release to the atmosphere
High pressure appliances can be evacuated to atmospheric pressure (O psig)
when; Right Ans - 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; Right Ans - 10 inches
of vacuum
When dehydrating a system it should be evacuated to a level of; Right Ans -
500 microns
When recovering from a system with a refrigerant leak, recover to a level of;
Right Ans - 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; Right Ans - 10
inches of vacuum
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; Right Ans - 4 inches of vacuum
What conditions allow for a system to be opened and repaired without
recovering the refrigerant to the required vacuum level? Right Ans - a
system with a large leak and system pressure is atmospheric
A new split system should be checked for leaks by; Right Ans - pressurizing
the system with a few ounces of r-22 and an inert gas
An overcharged system will operate; Right Ans - less efficiently
Refrigerant should be removed from the condenser outlet if the condenser is;
Right Ans - Below the reciever
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; Right Ans - 35%
Proper recovery techniques begin with the use of appropriate recovery
equipment that has been certified by; Right Ans - EPA approved labratory
What happens to a refrigerant that is above the saturation temperature?
Right Ans - It remains a vapor state
Industrial process and refrigeration units with a 50 pound charge or more
with an annualized leak rate of _____ or more must have leaks repaired.
Right Ans - 35%
Unless plans are made to replace a system exceeding the maximum leak,
repairs must be made in; Right Ans - 30 days
Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; Right
Ans - type A-1
All Refrigeration & HVAC systems are protected by a; Right Ans - Pressure
relief valve
A refrigerant sensor which will sound an alarm and automatically start a
ventilation system in occupied equipment rooms fall under; Right Ans -
ASHRAE Standard 15
Non-condensables will cause; Right Ans - High discharge pressure
A crankcase heater is often used to prevent refrigerant from migrating to the
oil during periods of: Right Ans - Low ambient tempurature
EPA regulations state that maintenance, service or repair involving the
removal of the following component is a "major repair" Right Ans -
compressor
What refrigerant can be used as a trace gas when checking for leaks? Right
Ans - R-22
What can be done with the refrigerant trace gas and nitrogen after the leak is
found? Right Ans - Release to the atmosphere
High pressure appliances can be evacuated to atmospheric pressure (O psig)
when; Right Ans - 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; Right Ans - 10 inches
of vacuum
When dehydrating a system it should be evacuated to a level of; Right Ans -
500 microns
When recovering from a system with a refrigerant leak, recover to a level of;
Right Ans - 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; Right Ans - 10
inches of vacuum
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; Right Ans - 4 inches of vacuum
What conditions allow for a system to be opened and repaired without
recovering the refrigerant to the required vacuum level? Right Ans - a
system with a large leak and system pressure is atmospheric
A new split system should be checked for leaks by; Right Ans - pressurizing
the system with a few ounces of r-22 and an inert gas
An overcharged system will operate; Right Ans - less efficiently
Refrigerant should be removed from the condenser outlet if the condenser is;
Right Ans - Below the reciever
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; Right Ans - 35%
Proper recovery techniques begin with the use of appropriate recovery
equipment that has been certified by; Right Ans - EPA approved labratory
What happens to a refrigerant that is above the saturation temperature?
Right Ans - It remains a vapor state
