EPA 608 Type 3 study guide Question
and answers verified to pass 2025
B - correct answer ✔When leak testing a low-pressure chiller, the maximum
pressure to use is;
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
A - correct answer ✔The most efficient method of leak checking a charged
low-pressure refrigeration unit is to;
A. pressurize the system using controlled hot water or heater blankets
B. pull a 500-micron vacuum and hold for at least 12 minutes
C. pull a 20-inch vacuum and hold for at least 24 hours
D. pull a 29.9 inch vacuum and hold for at least 24 hours
B - correct answer ✔When installing more than one, pressure relief valves
must be installed;
A. in series with each other
B. in parallel with each other
C. in the system's suction line
D. on top of compressor head
,B - correct answer ✔When charging a low-pressure system, refrigerant
should be introduced to the system as a vapor to raise the system's saturation
temperature to a minimum of;
A. 0 degrees
B. 36 degrees
C. 40 degrees
D. 70 degrees
C - correct answer ✔To repair a chiller operating with R-22, the technician;
A. does not need a certification
B. must have a Type 1 certification
C. must have a Type 2 certification
D. must have a Type 3 certification
B - correct answer ✔How long would an equipment owner or operator have
to retrofit or retire an appliance that has exceeded the threshold leak rate if
the replacement appliance uses 50 pounds or more of an exempt refrigerant?
A. 24 months
B. 18 months
C. 12 months
D. 3 months
A - correct answer ✔Where is the purge unit located in a low-pressure
system?
, A. The top of the condenser
B. In the lowest location
C. Above the shell
D. Before the oil separator
D - correct answer ✔Where is refrigerant added to a low-pressure system
during the charging process?
A. The access valve on the purge unit entering the condenser
B. The lowest access point on the system such as the condenser charging
valve
C. The highest access point on the system such as the evaporator inlet valve
D. The lowest access point on the system such as the evaporator charging
valve
B - correct answer ✔When pressurizing a low-pressure system for leak-
detection purposes, do not exceed
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
C - correct answer ✔What type of equipment can be worked on with Type 3
certification?
A. High-pressure
B. Medium-pressure
and answers verified to pass 2025
B - correct answer ✔When leak testing a low-pressure chiller, the maximum
pressure to use is;
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
A - correct answer ✔The most efficient method of leak checking a charged
low-pressure refrigeration unit is to;
A. pressurize the system using controlled hot water or heater blankets
B. pull a 500-micron vacuum and hold for at least 12 minutes
C. pull a 20-inch vacuum and hold for at least 24 hours
D. pull a 29.9 inch vacuum and hold for at least 24 hours
B - correct answer ✔When installing more than one, pressure relief valves
must be installed;
A. in series with each other
B. in parallel with each other
C. in the system's suction line
D. on top of compressor head
,B - correct answer ✔When charging a low-pressure system, refrigerant
should be introduced to the system as a vapor to raise the system's saturation
temperature to a minimum of;
A. 0 degrees
B. 36 degrees
C. 40 degrees
D. 70 degrees
C - correct answer ✔To repair a chiller operating with R-22, the technician;
A. does not need a certification
B. must have a Type 1 certification
C. must have a Type 2 certification
D. must have a Type 3 certification
B - correct answer ✔How long would an equipment owner or operator have
to retrofit or retire an appliance that has exceeded the threshold leak rate if
the replacement appliance uses 50 pounds or more of an exempt refrigerant?
A. 24 months
B. 18 months
C. 12 months
D. 3 months
A - correct answer ✔Where is the purge unit located in a low-pressure
system?
, A. The top of the condenser
B. In the lowest location
C. Above the shell
D. Before the oil separator
D - correct answer ✔Where is refrigerant added to a low-pressure system
during the charging process?
A. The access valve on the purge unit entering the condenser
B. The lowest access point on the system such as the condenser charging
valve
C. The highest access point on the system such as the evaporator inlet valve
D. The lowest access point on the system such as the evaporator charging
valve
B - correct answer ✔When pressurizing a low-pressure system for leak-
detection purposes, do not exceed
A. 5 psig
B. 10 psig
C. 15 psig
D. 20 psig
C - correct answer ✔What type of equipment can be worked on with Type 3
certification?
A. High-pressure
B. Medium-pressure
