chapter 6 Flashcards
What pressure should the pumper discharge the water under
when using a separate water supply to reinforce the
sprinkler system?
150 psi
How many multiple death fires have been recorded in a
building with a fully operational wet sprinkler system?
0
How many psi of pump pressure should be added for each
additional 10 stories above the 50th floor?
50 psi
When should members consider taking the elevator to the
attack location?
Fire on the 8th floor
What will happen when water in the amount of one sprinkler
head flows in the dry-pipe system?
Clapper will lock
What should be done by the attack crew to orient
themselves before moving to the smoky fire floor in a
high-rise apartment building?
Find the same room number on the floor below the fire
Which of the following control the flow of the water?
Post indicator valve
Which class of standpipe system delivers only 100 gpm and should not be depended upon for large fire knockdown?
Class II
Which size pipe wrench should be included in the standpipe
kit?
14-inch
What is the height of building where standpipes are
required?
75 feet
What is the most common type of sprinkler system control
valve?
OS&Y
Which of the following is a correct statement about a good
starting discharge pressure for the standpipe system
operations when using a straight nozzle?
100 psi plus 5 psi for every story above grade
Which of the following situations should you call for
assistance upon arrival when there is a sprinkler system
in place?
Heavy fire showing from the windows
What is the maximum pressure at the top-floor outlets when
a booster pump is in place?
65 psi
What size holes were drilled in the pipes in the first
attempts to create a nonautomatic sprinkler system?
1/8 inch
How long do gravity tanks generally provide protection
before running out of water?
30 to 90 minutes
What feature is seen as a water conservation feature as
well as a property saving feature in the pre-action
system?
System is able to shut off and on the system
How many lengths of 50-foot hoseline would be needed due
to current regulations on the location of standpipes in a
sprinklered building?
5
Which direction is the valve on the wall indicator valve
moved to close it?
Clockwise
What is a common problem with partial sprinkler systems?
It is only connected to the domestic water
What is a good amount of time for a sprinkler technician
to allow the water to flow before an alarm sounds to help
avoid false alarms?
1 minute
What is the most common type of sprinkler system?
Automatic wet
What can be used to move the smoke from a sprinklered
building that is large with a limited number of openings?
Use the HVAC system
Which of the following items is NOT a trade-off that is
allowed when a building will be sprinklered?
Decrease the distance to the exits
How much air pressure is used to hold back the top part of
the clapper in a differential dry-pipe valve?
35 psi
What is an uncommon occurrence at a location with a
sprinkler system in place that causes firefighters grief?
They go off once the firefighters are on scene
What are sprinkler contractors allowed to tap into when
installing a sprinkler system in an older high-rise
building?
Standpipe
How is the Siamese connection checked for water flow?
Feel for vibrations
What is the estimated space that each sprinkler head is
able to cover at 20 gpm?
100 square feet
What is a good rule of thumb in terms of pumpers and
Siamese connections?
One pumper for each Siamese
How many gpm would each normal sprinkler head flowing at
50 psi deliver?
40
Which location often has the manual dry standpipe system
in place?
Parking garage
What is used as a check valve in the automatic wet
sprinkler system?
Alarm valve
Which of the following areas is commonly protected by a
deluge system?
Truck loading rack
Which type of standpipe system would be the best choice
when there is the risk of freezing in the area?
Semiautomatic dry
Where does the attack usually begin when using the
standpipe?
Staircase nearest the fire
How far into the threads should the firefighter probe
before connecting to a standpipe outlet to ensure there
are no obstructions?
3 inches
What should be the pump pressure for a fog nozzle when
used on the 15th floor?
250 psi
Which system is used over expensive electronic equipment
to protect the items in the case of a water leak?
Pre-action
What size team should be posted at the controls of the
sprinkler system?
2-person
Which of the following is a good reason to use the solid
tip nozzle when using the standpipe system?
Allows rust to pass that can build up in the system
How many feet of raise adds 4.34 psi to the water?
How many feet of raise adds 4.34 psi to the water?
How many square feet per floor as a minimum requires a
standpipe system be installed?
20,000
How often should the pressure-reducing valve be flow
tested as a minimum?
3 years
Where should spare hose be flaked out when there is a
serious fire in a fire-resistant building to keep it from
being burned?
Floor below the fire
Which of the following is an indication that there is a
sprinkler system in the building?
Presence of a Siamese connection
Which type of reducer needs to be bypassed for fire
department use?
Pressure-reducing valve
How long can the piping in the New York Telephone
Switching Center’s sprinkler system able to withstand
1,500 degrees Fahrenheit?
15 minutes
What size is the main drain valve?
2-inch
What should be done by the attack crew to orient
themselves before moving to the smoky fire floor in a
high-rise apartment building?
Find the same room number on the floor below the fire
Which of the following is an inherent problem with the dry
standpipe system?
Piping may not be able to withstand the working pressure
What would keep you from mistakenly thinking a building
has a standpipe system due to the apparent requirements
being met?
Visit each building and observe the system
Which of the following control the flow of the water?
Post indicator valve
Who can reset the dry-pipe system once the alarm has
sounded?
Sprinkler contractor
Which type of reducer works via a plate creating friction
loss to reduce the flowing pressure on the downstream
side?
Orifice plate between the reducer and the outlet
What is the primary distinction between different classes
of standpipes?
Intended users
Which of the following is a legitimate reason to shut off
the automatic sprinkler system?
Conserve water for manual firefighting efforts
What is an absolute must in sprinklered buildings but is
also hard to accomplish?
Ventilation
Which standard regulates the standpipe systems?
NFPA 14
Which system is used over expensive electronic equipment
to protect the items in the case of a water leak?
Pre-action
What should be done before putting water into the
sprinkler system when there are members inside of the
structure?
Have them move to a safe location
How many feet of raise adds 4.34 psi to the water?
10 feet
Where is the standpipe outlet valve generally located?
Head height
Which class of standpipe system is for firefighter usage?
Class I
Which class of standpipe has a 2 1/2-inch and 1 1/2-inch outlets?
Class III
What is the best size hoseline to include in the standpipe
kit?
2 1/2-inch
What is the maximum nozzle pressure that will most likely
be available to work with in the upper floors of a
high-rise building?
50 psi
What does the OS&Y valve look like when the valve is open?
Stem is sticking up
How long have sprinkler systems been in use around the
world?
100 years
What is the maximum pressure that is allowed in the Class
III standpipe system’s 1 1/2-inch connection after 1993?
100 psi
Which of the following is a reason that fires in
sprinklered buildings seem more smoky?
Spray pattern pushes the smoke down to the floor
What senses the fire in a deluge system?
Fire detection system
Which of the following is NOT considered a strategy for
fighting fires in a sprinklered building?
Locate the system shutoffs when you arrive on scene
What are sprinkler heads marked as to?
Temperature
How many 2 1/2-inch lines should be used to supply the
sprinkler system?
p. 103
2
What is the minimum team size allowed by OSHA standards
for work within a standpiped building?
4
If you must force entry into a building due to receipt of
a water flow alarm, where is the best place to do it in
terms of building security when you leave?
Roof
Which type of sprinkler system is found in unheated areas
where freezing is a problem?
Dry-pipe
Which is the preferred type of standpipe system?
Automatic wet system
How many 2 1/2-inch lines should be used to supply the
sprinkler system?
2
Which class of standpipe system is for firefighter usage?
Class I
What is used as a check valve in the automatic wet
sprinkler system?
Alarm valve
Which type of sprinkler system does not have any water
supply attached to it?
Nonautomatic
