EPA TYPE 2 RESEARCHED AND WELL
ORGANISED TEST.
Which of the following statements about recycling and recovery equipment used for
stationary refrigeration is FALSE? - CORRECT ANSWER Purchases of such
equipment must be reported to the EPA.
What should be done after reaching the required recovery vacuum on an appliance? -
CORRECT ANSWER Wait for at least a few minutes to see if the system pressure
rises.
What area of a refrigeration system does oil foaming usually occur? - CORRECT
ANSWER Compressor
When is it against EPA regulations to use system-dependant recovery equipment? -
CORRECT ANSWER system-dependant recovery equipment? When the appliance
contains over 15 pounds of refrigerant.
What is the best use for testing with soap bubbles? - CORRECT ANSWER To pinpoint
refrigeration leaks.
You are changing out the compressor of a system containing 40 pounds of R-404A. In
addition to isolating the compressor, which of the following procedures should you
follow? - CORRECT ANSWER Evacuate the isolated section of the system to 0 psig
and if the system pressure does not rise after a few minutes, remove the compressor.
How long must an HVAC service company keep records for each disposed appliance
with a charge between 5 and 50 pounds? - CORRECT ANSWER З years
When recovery is first started, at what phase is the refrigerant removed to save
recovery time? - CORRECT ANSWER Liquid phase
When an appliance containing 50 pounds or more of a regulated refrigerant leaks
refrigerant at an annual rate of 125% or more, what must be included on the leak
inspection records submitted to the EPA? - CORRECT ANSWER Initial verification,
verification tests and records of recovered refrigerant from equipment.
What must an owner of a commercial refrigeration appliance with a charge of 2000
pounds of R-22 do once a leak rate threshold been exceeded? - CORRECT ANSWER
Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
, When can appliances containing refrigerants be recovered to atmospheric pressure? -
CORRECT ANSWER Leaks in the appliance make recovery to the prescribed level
unattainable.
Why could a recycling or recovery machine that uses a hermetic compressor overheat
when drawing deep vacuums? - CORRECT ANSWER The motor relies on the flow of
refrigerant through the compressor for cooling.
Starting in 2019, what leak rate triggers the EPA requirement that commercial
refrigeration systems containing 50 pounds or more of R-22 be repaired? - CORRECT
ANSWER 20%
For what refrigerant is an equipment room refrigerant detector NOT required under
ASHRAE Standard 15 provided the mechanical ventilation system in the machinery
room is run continuously? - CORRECT ANSWER R-717
Industrial process refrigeration units with a 50 pound charge or more with an annualized
leak rate ___of or more must have leaks repaired. - CORRECT ANSWER 30%
Unless plans are made to replace a system exceeding the maximum leak, repairs must
be made in; - CORRECT ANSWER 30 days.
Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; - CORRECT
ANSWER Туре А-1
All Refrigeration & HVAC systems are protected by a; - CORRECT ANSWER Pressure
relief valve
A refrigerant sensor which will sound an alarm and automatically start a ventilation
system in occupied equipment rooms fall under; - CORRECT ANSWER ASHRAE
Standard 15
Non-condensables will cause; - CORRECT ANSWER High discharge pressure
A crankcase heater is often used to prevent refrigerant from migrating to the oil during
periods of: - CORRECT ANSWER Low ambient temperature
EPA regulations state that maintenance, service or repair involving the removal of the
following component is a "major repair" - CORRECT ANSWER Compressor
Which of the following refrigerants is an HFO? - CORRECT ANSWER R-1234YF
What can be done with the refrigerant trace gas and nitrogen after the leak is found? -
CORRECT ANSWER Release to the atmosphere.
ORGANISED TEST.
Which of the following statements about recycling and recovery equipment used for
stationary refrigeration is FALSE? - CORRECT ANSWER Purchases of such
equipment must be reported to the EPA.
What should be done after reaching the required recovery vacuum on an appliance? -
CORRECT ANSWER Wait for at least a few minutes to see if the system pressure
rises.
What area of a refrigeration system does oil foaming usually occur? - CORRECT
ANSWER Compressor
When is it against EPA regulations to use system-dependant recovery equipment? -
CORRECT ANSWER system-dependant recovery equipment? When the appliance
contains over 15 pounds of refrigerant.
What is the best use for testing with soap bubbles? - CORRECT ANSWER To pinpoint
refrigeration leaks.
You are changing out the compressor of a system containing 40 pounds of R-404A. In
addition to isolating the compressor, which of the following procedures should you
follow? - CORRECT ANSWER Evacuate the isolated section of the system to 0 psig
and if the system pressure does not rise after a few minutes, remove the compressor.
How long must an HVAC service company keep records for each disposed appliance
with a charge between 5 and 50 pounds? - CORRECT ANSWER З years
When recovery is first started, at what phase is the refrigerant removed to save
recovery time? - CORRECT ANSWER Liquid phase
When an appliance containing 50 pounds or more of a regulated refrigerant leaks
refrigerant at an annual rate of 125% or more, what must be included on the leak
inspection records submitted to the EPA? - CORRECT ANSWER Initial verification,
verification tests and records of recovered refrigerant from equipment.
What must an owner of a commercial refrigeration appliance with a charge of 2000
pounds of R-22 do once a leak rate threshold been exceeded? - CORRECT ANSWER
Take further action by repairing, retiring, mothballing, or retrofitting the appliance.
, When can appliances containing refrigerants be recovered to atmospheric pressure? -
CORRECT ANSWER Leaks in the appliance make recovery to the prescribed level
unattainable.
Why could a recycling or recovery machine that uses a hermetic compressor overheat
when drawing deep vacuums? - CORRECT ANSWER The motor relies on the flow of
refrigerant through the compressor for cooling.
Starting in 2019, what leak rate triggers the EPA requirement that commercial
refrigeration systems containing 50 pounds or more of R-22 be repaired? - CORRECT
ANSWER 20%
For what refrigerant is an equipment room refrigerant detector NOT required under
ASHRAE Standard 15 provided the mechanical ventilation system in the machinery
room is run continuously? - CORRECT ANSWER R-717
Industrial process refrigeration units with a 50 pound charge or more with an annualized
leak rate ___of or more must have leaks repaired. - CORRECT ANSWER 30%
Unless plans are made to replace a system exceeding the maximum leak, repairs must
be made in; - CORRECT ANSWER 30 days.
Refrigerants CFC R-12, HCFC R-22, and HFC 134a are all classified as; - CORRECT
ANSWER Туре А-1
All Refrigeration & HVAC systems are protected by a; - CORRECT ANSWER Pressure
relief valve
A refrigerant sensor which will sound an alarm and automatically start a ventilation
system in occupied equipment rooms fall under; - CORRECT ANSWER ASHRAE
Standard 15
Non-condensables will cause; - CORRECT ANSWER High discharge pressure
A crankcase heater is often used to prevent refrigerant from migrating to the oil during
periods of: - CORRECT ANSWER Low ambient temperature
EPA regulations state that maintenance, service or repair involving the removal of the
following component is a "major repair" - CORRECT ANSWER Compressor
Which of the following refrigerants is an HFO? - CORRECT ANSWER R-1234YF
What can be done with the refrigerant trace gas and nitrogen after the leak is found? -
CORRECT ANSWER Release to the atmosphere.
