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Fire Officers Handbook of Tactics > Chapter 6 Sprinkler systems and standpipe operations > Flashcards

Chapter 6 Sprinkler systems and standpipe operations Flashcards

1
Q

Each normal sprinkler head flowing at 50 psi will deliver how many gpm?

A

40gpm

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2
Q

If the main pressure drop and sprinkler is operating at 5psi what is the gpm

A

10gpm

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3
Q

When supplying a FDC how many lines and what size is the minimum

A

two 2 1/2 lines

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4
Q

What psi are most pumpers rated to discharge maximum rated pump capacity in volume

A

150 psi

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5
Q

What is a new sprinkler piping system hydrostatically tested to?

A

200 psi

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6
Q

What can cause false alarms in sprinkler systems?

A

Large fluctuation in pressure of the water supply

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7
Q

What is the maximum delay an automatic system can be set for?

A

1 minute

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8
Q

In a dry-pipe system the differential dry-pipe valve has 30-40 psi on top and can hold back how much in water pressure

A

100 psi

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9
Q

How does a pre action system differ from a deluge system

A

Uses closed sprinklers so water discharges only over the fire area

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10
Q

What is the difference of the dry-pipe system valve vs the automatic wet system valve

A

dry pipe valve locks open

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11
Q

What is water columning in dry pipe system

A

Water above the clapper valve is so high the valve fails to open and charge the system

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12
Q

What flow is required to lock the clapper open and transmit the alarm in a dry pipe system

A

flow equal to one sprinkler

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13
Q

What will happen if you pump water into the FDC and OS&Y is closed

A

no water will be feed into the system or zone

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14
Q

What should the reconnaissance team deployed to the sprinkler room take with them?

A

forcible entry tools
bolt cutters
portable radio

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15
Q

What is the recon team job do when entering the control room

A

Verify actual position of control valves

closed valves could indicate arson

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16
Q

What is the general size of pressure tank on standby systems

A

2 to 5 thousand gallons usually last 30 minutes

17
Q

What is the most common sprinkler control?

A

OS&Y

18
Q

Where is the OS&Y usually located?

A

base of the sprinkler riser near the front of the building

19
Q

Which way do you turn the handle to open an OS&Y

A

counterclockwise

20
Q

If the center screw stem on an OS&Y is up which position is the valve

A

Open

21
Q

How can you gauge the amount the valve of an OS&Y is open or closed

A

the amount of stem protruding

22
Q

How can you tell if the valve on OS&Y is all the way open

A

the stem should be be above handle the same length as the diameter of the pipe

23
Q

In the sprinkler room how can you tell which is the main drain pipe

A

Usually a 2 inch pipe and will be the second biggest pipe in the room

24
Q

What type of valve is on the main drain in sprinkler room?

A

90 degree valve

25
Q

What are the 3 positions sprinkler heads are to be positioned?

A

upright
pendant
sidewall

26
Q

How are standpipe systems categorized by type?

A

Based on water supply

27
Q

What are the types of standpipes

A 
automatic wet
Automatic dry
semiautomatic dry 
manual wet
manual dry
28
Q

Every foot of water height exerts how much psi at the bottom

A

.434 psi

29
Q

How many psi per floor is estimated?

A

5 psi

30
Q

After 1993 maximum pressure at the top floor of a standpipe will be what?

A

100 psi where a occupant 1 1/2 hose is provided

31
Q

Which type of standpipe is primarily used by fire departments or others trained in handling heavy fire streams

A

Class 1

32
Q

This standpipe is designed for use by building occupants to control minor fires

A

Class 2

33
Q

What is the maximum outlet pressure NFPA 14 allows on 2 1/2 outlet on a standpipe

A

175 psi maximum, minimum of 100 psi

34
Q

What is a combination outlet control and pressure reducing valve called?

A

pressure reducing device

35
Q

How can the fire department bypass the pressure reducing device

A

Pull a pin similar to a fire extinguisher

Lift a tab

36
Q

The time it takes to respond to the building and set up for operations

A

Reflex time

37
Q

Building codes specify the use of standpipes based on what

A

Size of the building

usually 75ft in height or more than two stories of more than 20000 sq feet per floor

38
Q

When should firefighters never hook up to the standpipe

A

When the outlet is on the fire floor outside of the stairwell

39
Q

What is a good starting discharge pressure for standpipe operations

A

100 psi plus 5 psi per floor above grade

if using a fog nozzle start at 150 psi plus 5 per floor

Fire Officers Handbook of Tactics (11 decks)

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