EPA 608 FINAL EXAM QUESTIONS AND
ANSWERS
1. When using NITROGEN in any HVAC application what is always
required??: -
REGULATOR
2. Flaring (Flared Fittings) are classified as what kind of connection??:
MECHANICAL/ COMPRESSION (Bell Shape)
3. Swaging is a method of expanding copper to create what kind
of connec- tion??: BRAZED/WELDED
4. What is the purpose of a nitrogen purge when brazing??: To prevent
OXIDATION of the copper.
5. Approximately what PSI should a tech's Nitrogen purge be set
when braz- ing??: 1- 2 PSI
6. CFCs & HCFCs when exposed to open flame or very hot surface can
produce what hazard?: PHOSGENE GAS
1/
7
, 7. What is the purpose of a system pressure test after conducting
a sealed system repair??: To IDENTIFY LEAKS in the system
8. When conducting a system pressure test, what is used to
pressurized the system??: NITROGEN
9. Which leak detection method is best for Pinpointing leak location??:
SOAP BUBBLE METHOD
10. Which leak detection method is best for generalized leak
detection??: Electronic leak detector / Ultrasonic leak detector
11. ASHRAE SAFTEY #15: Mechanical Safety
12. ASHRAE: The American Society of Heating, Refrigerating and Air-Conditioning Engineers
13. Ozone in made of what atoms?: 3- OXYGEN ATOMS
14. Which chemical in CFCs and HCFCs destroys ozone??: CHLORINE
15. What kind of problem is ozone depletion??: GLOBAL
16. Which of the following is used as the baseline
2/
7
ANSWERS
1. When using NITROGEN in any HVAC application what is always
required??: -
REGULATOR
2. Flaring (Flared Fittings) are classified as what kind of connection??:
MECHANICAL/ COMPRESSION (Bell Shape)
3. Swaging is a method of expanding copper to create what kind
of connec- tion??: BRAZED/WELDED
4. What is the purpose of a nitrogen purge when brazing??: To prevent
OXIDATION of the copper.
5. Approximately what PSI should a tech's Nitrogen purge be set
when braz- ing??: 1- 2 PSI
6. CFCs & HCFCs when exposed to open flame or very hot surface can
produce what hazard?: PHOSGENE GAS
1/
7
, 7. What is the purpose of a system pressure test after conducting
a sealed system repair??: To IDENTIFY LEAKS in the system
8. When conducting a system pressure test, what is used to
pressurized the system??: NITROGEN
9. Which leak detection method is best for Pinpointing leak location??:
SOAP BUBBLE METHOD
10. Which leak detection method is best for generalized leak
detection??: Electronic leak detector / Ultrasonic leak detector
11. ASHRAE SAFTEY #15: Mechanical Safety
12. ASHRAE: The American Society of Heating, Refrigerating and Air-Conditioning Engineers
13. Ozone in made of what atoms?: 3- OXYGEN ATOMS
14. Which chemical in CFCs and HCFCs destroys ozone??: CHLORINE
15. What kind of problem is ozone depletion??: GLOBAL
16. Which of the following is used as the baseline
2/
7
