Exam (elaborations)
HVAC LVL 2 NCCER TEST QUESTIONS AND ANSWERS
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HVAC LVL 2 NCCER TEST QUESTIONS AND ANSWERS
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HVAC LVL 2 NCCER TEST QUESTIONSAND ANSWERS
1. Two refrigerants exempted from the EPA requirement to recover, recycle, and
reclaim are_____. - Answer-a. ammonia and carbon dioxide
2. Which of the following is the only EPA-approved refrigerant that can be used for leak
testing? - Answer-d. HCFC-22
3. When pressurizing a system for leak testing, a safe test pressure is typically _____. -
Answer-c. 125 psig
4. A typical nitrogen cylinder is charged to a pressure of roughly _____. - Answer-b.
2,000 psig
5. An apprentice in training is exempt from the technician certification requirement for a
period
of _____. - Answer-d. two years from the date the apprenticeship was initially registered
6. For the most serious violations of the Clean Air Act, the EPA will _____. - Answer-d.
prosecute the case in federal court
7. When using a self-contained recovery unit to recover refrigerant vapor, the discharge
of the
recovery unit is typically connected to _____. - Answer-b. a recovery cylinder
8. Which of the following situations typically prevents the use of the push-pull method of
refrigerant recovery? - Answer-c. The system being recovered contains 7 pounds of
refrigerant.
9. Moisture in a system reacts with refrigerant to form _____. - Answer-b. acids
10. The oil in a vacuum pump should be changed _____. - Answer-c. during or
immediately after pumping down a wet system
11. A vacuum pump with a capacity of 6-12 cfm should be adequate to evacuate
systems with
capacities up to _____. - Answer-b. 30 tons
12. Which of the following values is closest to a perfect vacuum? - Answer-a. 50
microns
13. During or following an evacuation, which of the following typically indicates a
refrigerant
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