EPA Exam Version D34 QUESTIONS
AND VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST 2026-2027] 100%
GUARANTEED
What gas should be used to leak check a system designed for use with R-410A that has been
opened for a major system repair? - CORRECT ANSWER-pressurized nitrogen
Why is important NOT to mix different refrigerants in the same container when recovering
refrigerant? - CORRECT ANSWER-the mixture may be impossible to reclaim
What will the capacity of a vacuum pump and its suction line size determine? - CORRECT
ANSWER-The length of dehydration time
, The color marking that is required on all pipes, hoses, or other devices through which a
flammable refrigerant passes and where a service connection is probable, must extend a
minimum of how ma inch(es) in both directions from such locations? - CORRECT ANSWER-1
When using vapor recovery, the fill level of the recovery cylinder can be controlled by any of the
following, EXCEPT; - CORRECT ANSWER-the pitch of the recovery device.
A refrigerant label is placed on a; - CORRECT ANSWER-cylinder to identify gross weight
After installation of a field piped split system, the unit should first be pressurized with; -
CORRECT ANSWER-Nitrogen and leak checked
What should systems that use R-407C be leak checked with? - CORRECT ANSWER-pressurized
nitrogen and a trace amount of R-407C
Which leak repair category does the EPA define as the refrigeration appliances used in the retail
food and cold storage warehouse sectors? - CORRECT ANSWER-Commercial Refrigeration
A customer has an industrial process refrigeration system that contains 1000 lbs. of R-22 that
has exceeded the applicable leak rate threshold. How often is the customer required to perform
a leak inspection? - CORRECT ANSWER-every 3 months
How long do owners or operators of an appliance with a full charge of 50 or more pounds of
ozone-depleting refrigerant have to retire an appliance if the replacement uses a refrigerant
that is exempt from the venting prohibition? - CORRECT ANSWER-18 months
When recovery is first started, at what phase is the refrigerant removed to save recovery time? -
CORRECT ANSWER-liquid phase
AND VERIFIED CORRECT ANSWERS
GRADED A+ [LATEST 2026-2027] 100%
GUARANTEED
What gas should be used to leak check a system designed for use with R-410A that has been
opened for a major system repair? - CORRECT ANSWER-pressurized nitrogen
Why is important NOT to mix different refrigerants in the same container when recovering
refrigerant? - CORRECT ANSWER-the mixture may be impossible to reclaim
What will the capacity of a vacuum pump and its suction line size determine? - CORRECT
ANSWER-The length of dehydration time
, The color marking that is required on all pipes, hoses, or other devices through which a
flammable refrigerant passes and where a service connection is probable, must extend a
minimum of how ma inch(es) in both directions from such locations? - CORRECT ANSWER-1
When using vapor recovery, the fill level of the recovery cylinder can be controlled by any of the
following, EXCEPT; - CORRECT ANSWER-the pitch of the recovery device.
A refrigerant label is placed on a; - CORRECT ANSWER-cylinder to identify gross weight
After installation of a field piped split system, the unit should first be pressurized with; -
CORRECT ANSWER-Nitrogen and leak checked
What should systems that use R-407C be leak checked with? - CORRECT ANSWER-pressurized
nitrogen and a trace amount of R-407C
Which leak repair category does the EPA define as the refrigeration appliances used in the retail
food and cold storage warehouse sectors? - CORRECT ANSWER-Commercial Refrigeration
A customer has an industrial process refrigeration system that contains 1000 lbs. of R-22 that
has exceeded the applicable leak rate threshold. How often is the customer required to perform
a leak inspection? - CORRECT ANSWER-every 3 months
How long do owners or operators of an appliance with a full charge of 50 or more pounds of
ozone-depleting refrigerant have to retire an appliance if the replacement uses a refrigerant
that is exempt from the venting prohibition? - CORRECT ANSWER-18 months
When recovery is first started, at what phase is the refrigerant removed to save recovery time? -
CORRECT ANSWER-liquid phase
