Practice test

North Carolina HVAC Practice Test

Free North Carolina HVAC practice test with 20 questions on refrigeration, heating systems, EPA 608 rules, and NC heating contractor licensing. Instant scoring.

These questions are for study practice only and are not official exam questions.

Question 1

1

Under EPA Section 608, which certification type is required to service small appliances containing refrigerant, such as household refrigerators?

Question 2

2

Under federal refrigerant handling rules, what is the general term for capturing refrigerant from a system and storing it in an external container without necessarily testing or processing it?

Question 3

3

Under EPA regulations, what must a technician do before opening a system containing more than a minimal amount of refrigerant for service?

Question 4

4

In the basic refrigeration cycle, where does the refrigerant absorb heat from the space being cooled?

Question 5

5

Which refrigeration component increases the pressure and temperature of the refrigerant vapor?

Question 6

6

A technician measures high superheat and low subcooling on a fixed-orifice metering device system. What does this most likely indicate?

Question 7

7

What does subcooling measure in a refrigeration system?

Question 8

8

In a gas furnace, what is the function of the heat exchanger?

Question 9

9

What is the main advantage of a two-stage or modulating gas furnace over a single-stage furnace?

Question 10

10

A heat pump in heating mode loses capacity as outdoor temperature drops. What is the common solution used to maintain comfort during very cold weather?

Question 11

11

In North Carolina, what is the purpose of a limit switch on a gas furnace?

Question 12

12

What is the general purpose of a filter drier installed in a refrigeration line?

Enable JavaScript for the interactive step-by-step quiz with instant scoring and explanations.