Exam (elaborations)
HVAC LVL 2 NCCER TEST QUESTIONS AND ANSWERS
- Course
- Institution
HVAC LVL 2 NCCER TEST QUESTIONS AND ANSWERS
[Show more]
Content preview
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
74735 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now