NFPA 13 Flashcards
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
Each of the above
In a dry pipe system, the pipes can contain air or what other element under
pressure?
A. Argon
B. Nitrogen
C. Hydrogen
D. Xenon
Nitrogen
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
10
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
Mechanical
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
Water deluge
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
20 psi
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
1/8 inch
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
Solder
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
Freezing temperatures
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.
It is moderate or fast acting.
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
6 to 15 psi
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
200 psi
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
40° F
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
Annually
At what interval should you inspect and test water flow alarms?
A. Weekly
B. Monthly
C. Quarterly
D. Annually
Quarterly
At what interval should you inspect and test air and water pressure in dry pipe
systems?
A. Weekly
B. Monthly
C. Quarterly
D. Annually
Weekly
At what interval should you inspect and test general condition of standpipe
systems?
A. Weekly
B. Monthly
C. Quarterly
D. Annually
Annually
At what interval should you inspect and test general condition of hydrants?
A. Monthly
B. Quarterly
C. Annually
D. Every 3 years
Annually
At what interval should you inspect and test water level in tanks?
A. Weekly
B. Monthly
C. Quarterly
D. Annually
Monthly
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
18 inches
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
2-inch drain test
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
30 psi
When performing a basic inspection of accelerators and exhausters, you should
check what pressure?
A. Water
B. Air
C. Centrifugal
D. Atmospheric
Air
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
Quarterly
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
Hot water or hot cloth
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
Failing electrodes
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
3
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
Electrical non-conductivity
What is the normal cylinder pressure in a high-pressure system?
A. 600 psi
B. 500 psi
C. 400 psi
D. 300 psi
600 psi
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
(a) 300 psi (b) 0°F
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
3
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
5,000
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
2,000
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
Electrical lockout
Installation of a new Halon 1301 system is prohibited without special approval
from whom?
A. NAVFACENGCOM
B. EPA
C. ROICC
D. Base fire chief
EPA
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
An alarm
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
12 years
What type of system can be used with dry chemicals?
A. Total flooding
B. Local application
C. Hose line
D. Each of the above
Each of the above
What is the most widely used dry chemical?
A. Nitrogen
B. Sodium bicarbonate
C. Monoammonium phosphate
D. Potassium phosphate
Monoammonium phosphate
Dry chemicals are used primarily on what type of fires?
A. Flammable liquid
B. Cellulose nitrate
C. Dry wood
D. Delicate electrical equipment
Flammable liquid
Dry chemical distribution systems are constructed of what schedule of pipe?
A. 40
B. 30
C. 20
D. 10
40
