Page 1 of 10
SKILLCAT EPA 608 EXAM NEWEST 2025 ACTUAL
EXAM| COMPLETE 250 QUESTIONS WITH CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
When using NITROGEN in any HVAC application what is always
required?? .....ANSWER..... REGULATOR
Flaring (Flared Fittings) are classified as what kind of
connection?? .....ANSWER..... MECHANICAL/ COMPRESSION (Bell
Shape)
Swaging is a method of expanding copper to create what kind
of connection?? .....ANSWER..... BRAZED/WELDED
What is the purpose of a nitrogen purge when brazing??
.....ANSWER..... To prevent OXIDATION of the copper.
Approximately what PSI should a tech's Nitrogen purge be set
when brazing?? .....ANSWER..... 1- 2 PSI
, Page 2 of 10
CFCs & HCFCs when exposed to open flame or very hot surface
can produce what hazard? .....ANSWER..... PHOSGENE GAS
What is the purpose of a system pressure test after conducting a
sealed system repair?? .....ANSWER..... To IDENTIFY LEAKS in the
system
When conducting a system pressure test, what is used to
pressurized the system?? .....ANSWER..... NITROGEN
Which leak detection method is best for Pinpointing leak
location?? .....ANSWER..... SOAP BUBBLE METHOD
Which leak detection method is best for generalized leak
detection?? .....ANSWER..... Electronic leak detector / Ultrasonic
leak detector
ASHRAE SAFTEY #15 .....ANSWER..... Mechanical Safety
ASHRAE .....ANSWER..... The American Society of Heating,
Refrigerating and Air-Conditioning Engineers
SKILLCAT EPA 608 EXAM NEWEST 2025 ACTUAL
EXAM| COMPLETE 250 QUESTIONS WITH CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
When using NITROGEN in any HVAC application what is always
required?? .....ANSWER..... REGULATOR
Flaring (Flared Fittings) are classified as what kind of
connection?? .....ANSWER..... MECHANICAL/ COMPRESSION (Bell
Shape)
Swaging is a method of expanding copper to create what kind
of connection?? .....ANSWER..... BRAZED/WELDED
What is the purpose of a nitrogen purge when brazing??
.....ANSWER..... To prevent OXIDATION of the copper.
Approximately what PSI should a tech's Nitrogen purge be set
when brazing?? .....ANSWER..... 1- 2 PSI
, Page 2 of 10
CFCs & HCFCs when exposed to open flame or very hot surface
can produce what hazard? .....ANSWER..... PHOSGENE GAS
What is the purpose of a system pressure test after conducting a
sealed system repair?? .....ANSWER..... To IDENTIFY LEAKS in the
system
When conducting a system pressure test, what is used to
pressurized the system?? .....ANSWER..... NITROGEN
Which leak detection method is best for Pinpointing leak
location?? .....ANSWER..... SOAP BUBBLE METHOD
Which leak detection method is best for generalized leak
detection?? .....ANSWER..... Electronic leak detector / Ultrasonic
leak detector
ASHRAE SAFTEY #15 .....ANSWER..... Mechanical Safety
ASHRAE .....ANSWER..... The American Society of Heating,
Refrigerating and Air-Conditioning Engineers
