NFPA 13

Question 1

All automatic sprinkler systems have which of the following characteristics in
common?
A. Water supply
B. Piping network
C. Sprinklers
D. Each of the above

Answer 1

Each of the above

Question 2

In a dry pipe system, the pipes can contain air or what other element under
pressure?
A. Argon
B. Nitrogen
C. Hydrogen
D. Xenon

Answer 2

Nitrogen

Question 3

In a differential dry pipe valve system, the air must be maintained at least how
many psi greater than the trip pressure?
A. 20
B. 15
C. 10
D. 5

Answer 3

10

Question 4

When debris in the water is a problem, you should use what type of dry pipe
valve?
A. Low differential
B. High differential
C. Mechanical
D. Latched clapper

Answer 4

Mechanical

Question 5

What type of automatic sprinkler system should you use in an aircraft hangar?
A. Wet pipe
B. Semidry pipe
C. Water deluge
D. Semi-wet pipe

Answer 5

Water deluge

Question 6

Pre-prime plugs blow out of the sprinklers at approximately what water pressure?
A. 25 psi
B. 20 psi
C. 15 psi
D. 10 psi

Answer 6

20 psi

Question 7

Automatic sprinklers have orifices graduated in what size increments?
A. 1/2 inch
B. 1/4 inch
C. 1/8 inch
D. 1/16 inch

Answer 7

1/8 inch

Question 8

A fusible link sprinkler is kept closed by a two-piece link fused together by what
type of metal?
A. Copper
B. Aluminum
C. Solder
D. Steel

Answer 8

Solder

Question 9

A dry pendent sprinkler is used when the system is exposed to which of the
following conditions?
A. High ambient temperatures
B. Freezing temperatures
C. Explosive elements
D. Unstable chemicals

Answer 9

Freezing temperatures

Question 10

A dry pipe alarm system has which of the following characteristics?
A. It is slow acting.
B. It is moderate acting only.
C. It is fast acting only.
D. It is moderate or fast acting.

Answer 10

It is moderate or fast acting.

Question 11

The retard switch connected to the alarm port of a wet sprinkler system alarm-
check valve is normally set within what pressure range?
A. 10 to 20 psi
B. 8 to 15 psi
C. 6 to 15 psi
D. 4 t0 15 psi

Answer 11

6 to 15 psi

Question 12

In an electronic pressure-drop detector, an overpressure condition of what
magnitude can cause a trouble signal?
A. 250 psi
B. 200 psi
C. 150 psi
D. 100 psi

Answer 12

200 psi

Question 13

To prevent freezing of water in a fire protection system, a Utilitiesman normally
installs a supervisory device in a pipe or reservoir with what low water
temperature setting?
A. 40° F
B. 32° F
C. 25° F
D. 0° F

Answer 13

40° F

Question 14

At what interval should you inspect and test the general condition of sprinkler
heads and sprinkler systems?
A. Monthly
B. Quarterly
C. Annually
D. Every 3 years

Answer 14

Annually

Question 15

At what interval should you inspect and test water flow alarms?
A. Weekly
B. Monthly
C. Quarterly
D. Annually

Answer 15

Quarterly

Question 16

At what interval should you inspect and test air and water pressure in dry pipe
systems?
A. Weekly
B. Monthly
C. Quarterly
D. Annually

Answer 16

Weekly

Question 17

At what interval should you inspect and test general condition of standpipe
systems?
A. Weekly
B. Monthly
C. Quarterly
D. Annually

Answer 17

Annually

Question 18

At what interval should you inspect and test general condition of hydrants?
A. Monthly
B. Quarterly
C. Annually
D. Every 3 years

Answer 18

Annually

Question 19

At what interval should you inspect and test water level in tanks?
A. Weekly
B. Monthly
C. Quarterly
D. Annually

Answer 19

Monthly

Question 20

What minimum distance must be maintained beneath a sprinkler for proper water
distribution?
A. 48 inches
B. 36 inches
C. 24 inches
D. 18 inches

Answer 20

18 inches

Question 21

What type of test should be performed quarterly to test the alarm-check valves?
A. 8-inch drain test
B. 6-inch drain test
C. 4-inch drain test
D. 2-inch drain test

Answer 21

2-inch drain test

Question 22

When testing a water clapper valve designed to trip at a fixed pressure of 10 to
15 psi, you should maintain what minimum air pressure on this valve?
A. 60 psi
B. 45 psi
C. 30 psi
D. 15 psi

Answer 22

30 psi

Question 23

When performing a basic inspection of accelerators and exhausters, you should
check what pressure?
A. Water
B. Air
C. Centrifugal
D. Atmospheric

Answer 23

Air

Question 24

When testing deluge and pre-action valves, you should perform the 2-inch drain
test at what time interval?
A. Weekly
B. Monthly
C. Quarterly
D. Annually

Answer 24

Quarterly

Question 25

When performing a deluge valve dry trip-test in a flammable area, you should use what test in place of the electric test set? A. Infrared light B. Hot water only C. Hot cloth only D. Hot water or hot cloth

Answer 25

Hot water or hot cloth

Question 26

When performing the cathodic protection test with an ammeter, you notice a diminishing current flow. This is an indication of what type of problem? A. Failing electrodes B. Blown fuses C. Frozen electrodes D. Broken ground wires

Answer 26

Failing electrodes

Question 27

Under normal circumstances, full operational testing of high-speed suppression systems should be conducted at intervals not to exceed how many years? A.7 B.5 C.3 D.1

Answer 27

3

Question 28

What characteristic of carbon dioxide makes it desirable for use on electrical fires? A. High-pressure application B. Electrical conductivity C. Electrical non-conductivity D. Low-pressure application

Answer 28

Electrical non-conductivity

Question 29

What is the normal cylinder pressure in a high-pressure system? A. 600 psi B. 500 psi C. 400 psi D. 300 psi

Answer 29

600 psi

Question 30

In a low-pressure system, liquid carbon dioxide should always be maintained at what constant (a) pressure and (b) temperature? A. (a) 300 psi (b) 0°F B. (a) 300 psi (b) 32°F C. (a) 200 psi (b) 32°F D. (a) 200 psi (b) 0°F

Answer 30

(a) 300 psi (b) 0°F

Question 31

High-pressure systems require approximately how many pounds of equipment for every pound of carbon dioxide stored? A.7 B.5 C.3 D.1

Answer 31

3

Question 32

Pipe and fittings in a high-pressure system have what minimum bursting pressure in psi? A. 7,000 B. 5,000 C. 3,000 D. 2,000

Answer 32

5,000

Question 33

Pipe and fittings in a low-pressure system have a minimum bursting pressure of how many psi? A. 3,000 B. 2,800 C. 2,000 D. 1,800

Answer 33

2,000

Question 34

What automatic device should be installed along with a total flooding system to conserve carbon dioxide? A. Closing B. Venting C. Door closure D. Electrical lockout

Answer 34

Electrical lockout

Question 35

Installation of a new Halon 1301 system is prohibited without special approval from whom? A. NAVFACENGCOM B. EPA C. ROICC D. Base fire chief

Answer 35

EPA

Question 36

Regardless of the method being used, what device must be attached to the releasing mechanism? A. An auxiliary fan B. A control valve C. A light D. An alarm

Answer 36

An alarm

Question 37

At what maximum time interval should you replace the frangible disks on low- pressure storage tanks? A. 12 years B. 8 years C. 7 years D. 5 years

Answer 37

12 years

Question 38

What type of system can be used with dry chemicals? A. Total flooding B. Local application C. Hose line D. Each of the above

Answer 38

Each of the above

Question 39

What is the most widely used dry chemical? A. Nitrogen B. Sodium bicarbonate C. Monoammonium phosphate D. Potassium phosphate

Answer 39

Monoammonium phosphate

Question 40

Dry chemicals are used primarily on what type of fires? A. Flammable liquid B. Cellulose nitrate C. Dry wood D. Delicate electrical equipment

Answer 40

Flammable liquid

Question 41

Dry chemical distribution systems are constructed of what schedule of pipe? A. 40 B. 30 C. 20 D. 10

Answer 41

40