Practice test

HVAC Practice Exam 3

Free 25-question HVAC quiz on recovery rules, cylinder safety, system accessories, gas and oil furnaces, and ductwork. Foundation level with instant scoring.

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

Question 1

1

Section 609 of the Clean Air Act, separate from 608, covers refrigerant handling for:

Question 2

2

Before opening a small appliance for repair, a Type I technician must recover refrigerant to:

Question 3

3

Recovered refrigerant that has only been pulled from one system and not processed may legally be:

Question 4

4

Mixing two different refrigerants in one recovery cylinder is a problem because:

Question 5

5

Overfilling a recovery cylinder is dangerous because:

Question 6

6

An ozone-friendly substitute must still be handled under 608 if it:

Question 7

7

DOT regulations on refrigerant cylinders mainly address:

Question 8

8

A refrigerant's ODP of zero means it:

Question 9

9

The four major components of a basic refrigeration system are:

Question 10

10

Heat always travels naturally from:

Question 11

11

One ton of refrigeration equals:

Question 12

12

A 'flooded' evaporator (very low superheat) risks:

Question 13

13

The accumulator in some systems is installed to:

Question 14

14

A receiver in a refrigeration system stores:

Question 15

15

A filter drier is installed to:

Question 16

16

Moisture inside a refrigeration system is harmful because it can:

Question 17

17

Natural gas is delivered to a residential furnace at a manifold pressure typically near:

Question 18

18

The draft inducer (induced-draft) motor on a furnace:

Question 19

19

A pressure (draft) switch on an induced-draft furnace proves that:

Question 20

20

Oil furnaces atomize fuel oil with a:

Question 21

21

A cad cell in an oil burner is used to:

Question 22

22

Increasing duct restriction (higher static pressure) generally causes blower airflow to:

Question 23

23

A return-air duct that is too small will typically cause:

Question 24

24

A heat pump in heating mode treats the indoor coil as the:

Question 25

25

Supply registers and return grilles are part of a building's:

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