Strategy and Tactics Chapter 7

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What is the primary purpose of wet pipe sprinkler systems in a residence?

To support offensive strategies

To lay backup lines for extinguishment

To minimize fire damage

To allow additional escape time (correct)

What should firefighters be prepared to resolve as causes of sprinkler failure?

Improper design of the system

Closed valve in the water supply (correct)

Inadequate maintenance of the building structure

Occupancy changes rendering the system unsuitable

What is the primary purpose of a dry pipe system?

To provide a more reliable fire protection system

To allow for faster system activation

To prevent freezing in areas subject to low temperatures (correct)

To reduce the risk of antifreeze contamination

What is a characteristic of a preaction sprinkler system?

It has a sensing device that opens a valve flooding the piping with water Signup and view all the answers

What is a requirement for dry pipe and preaction systems with a capacity exceeding 500 gallons?

They must be equipped with an accelerator or exhauster Signup and view all the answers

What is the primary purpose of deluge systems?

To protect areas with high-challenge fire potential Signup and view all the answers

What is the recommended action when a system is out of service according to NFPA 25?

Place a tag at required locations Signup and view all the answers

What is the most common operational error at properties protected by automatic sprinkler systems?

Shutting down the system prematurely Signup and view all the answers

What is a method of checking for water flow if the sprinkler system is not equipped with a water gong?

Putting an ear against the riser and listening for water flow Signup and view all the answers

What is considered poor practice when determining whether the fire pumps are running?

Relying on remote annunciator panels Signup and view all the answers

What size of lines should be connected to the Fire Department Connection (FDC) when a pumper is connected to an adequate offsite water supply?

Two 2.5" inch or two 3" lines Signup and view all the answers

What pressure do most Fire Departments provide to the Fire Department Connection (FDC)?

150 psi Signup and view all the answers

What is a common main control valve?

Outside stem and yoke Signup and view all the answers

What are the options for the assigned FDC pumper when a hydrant is nearby?

Use soft suction to connect to the hydrant and hand lay lines to the FDC Signup and view all the answers

What is a potential problem with using Large Diameter Hose (LDH) to supply a sprinkler system or standpipe?

The weight of hose and water bearing on the intake is significant Signup and view all the answers

What is a potential problem with LDH FDC connections?

Unisex connection can accidentally disconnect Signup and view all the answers

What is an important consideration for facilities protected by a deluge system?

Manual operation of the deluge valve should be done provided it is safe to do so in a safe location Signup and view all the answers

What action should property owners take after their sprinkler system has been used at a fire?

Contact a licensed sprinkler contractor to inspect the system after use at a fire Signup and view all the answers

What type of standpipe system is filled with water and provides water when a discharge is opened?

Automatic wet Signup and view all the answers

Which standpipe system relies entirely on water provided by the Fire Department Connection (FDC)?

Manual dry Signup and view all the answers

Which standpipe system admits water into the piping upon activation of a remote-control device located at a hose connection?

Semiautomatic dry Signup and view all the answers

What type of standpipe uses 2.5" hose connections?

Class I Signup and view all the answers

What type of standpipe uses 1.5" hose connections?

Class II Signup and view all the answers

What type of standpipe uses 1.5" and 2.5" hose connections?

Class III Signup and view all the answers

What does 150 ft of 1.75" line with 15/16 or 7/8 tip or a low constant flow nozzle provide?

A flow capable of containing most fires in a compartment not requiring a flow of more than 100 gpm Signup and view all the answers

What does the law of hydraulics state about backpressure for elevation?

0.434 psi for every 1 ft of elevation Signup and view all the answers

What is one of the primary problems of a manual dry system?

Problems with the standpipe won't be known until the FD attempts to use the system Signup and view all the answers

What is the one of the primary benefits of using carbon dioxide extinguishing agents?

Preventing water damage Signup and view all the answers

What is the purpose of a foam house in refineries and petroleum storage depots?

Contain additional quantities of foam agent Signup and view all the answers

How does carbon dioxide extinguish fires?

Depleting the oxygen supply Signup and view all the answers