Practice test

HVAC Practice Exam 2

Free 25-question HVAC practice test on certification types, superheat and subcooling basics, AFUE, and furnace controls. Instant scoring and full explanations.

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

Question 1

1

Which EPA 608 certification covers high-pressure appliances such as residential split-system air conditioners?

Question 2

2

Type III certification applies to:

Question 3

3

Which certification lets a technician work on all three stationary appliance types?

Question 4

4

Disposable (non-refillable) refrigerant cylinders should be:

Question 5

5

What does GWP measure?

Question 6

6

Reclaimed refrigerant must be processed to the purity standard:

Question 7

7

A refrigerant leak you can hear or feel escaping should be:

Question 8

8

Self-contained recovery equipment must be:

Question 9

9

In the refrigeration cycle, where does the refrigerant change from high-pressure liquid to a low-pressure mixture?

Question 10

10

Which line carries cool, low-pressure vapor back to the compressor?

Question 11

11

Higher-than-normal superheat usually indicates the evaporator is:

Question 12

12

Low subcooling on a TXV system most often points to:

Question 13

13

A capillary tube is best described as:

Question 14

14

Which refrigerant property describes the temperature at which it boils for a given pressure?

Question 15

15

Sensible heat changes a substance's:

Question 16

16

Latent heat in the evaporator is absorbed when the refrigerant:

Question 17

17

Which is the smaller, warm line in a typical AC system?

Question 18

18

A 95 percent AFUE condensing furnace is more efficient because it:

Question 19

19

Which furnace component transfers combustion heat to the airstream while keeping flue gases separate?

Question 20

20

In a heat pump, supplemental or auxiliary heat is usually provided by:

Question 21

21

What happens to a heat pump's heating capacity as the outdoor temperature falls?

Question 22

22

A dirty air filter most directly causes:

Question 23

23

The blower in a forced-air furnace runs during heating to:

Question 24

24

Combustion air is required for a fuel-burning furnace because:

Question 25

25

Which thermostat wire commonly controls the cooling contactor (compressor) call?

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