Chap#14/15 Flashcards
During annual testing, attack hose is tested at what pressure?
300psi
Which pressure measurement provides the best indicator of how much more water is available in the system?
Residual
Which pressure must be measured to calculate the quantity of water flowing through a hydrant discharge?
Residual
Which is an appropriate use for a 25-mm (1-in.)
booster line?
Dumpster fire
Which type of valve is opened or closed by rotating a handle a quarter turn?
Butterfly
How much water can a 2.5 inch handline flow a minute
250gpm
What is the operating pressure of a smooth- bore Nozzle
50psi
How much length does a booster give you?
150 to 200
What is the gpm for a master stream
350 to 1500
What causes friction loss with a hose
Size of hose and how long it is
What is static pressure
The amount of pressure in the system when no water is moving also call ( normal operating pressure
How long are attack hoses and what size hose are they?
In between 150 to 350 ft
1.5 or 1.75 inch hose
What does gravity cause
Elevation or head pressure
What are Ball valves used on
Nozzles, gates wyes and pumper discharge gate
What colour hydrant flows 1000 to 1499 gpm
Green
How much flow does a red hydrant have?
500gpm or less
How can you stop water hammer from happening
Open and close the flow of water slowly
Which is the correct tool to tighten a hard suction hose connection?
Rubber mallet
Traditionally, most fog nozzles were designed to operate at which nozzle pressure?
100psi
A dry hydrant provides access to?
a static water source
How can you determine that a dry-barrel hydrant is still draining?
Place a hand over an outlet and feel for suction
How close must a pumper get to a static water source to be able to draft directly from it through hard suction hose?
20 ft 6m
The amount of pressure in a water distribution system during average consumption is called __________ pressure.
normal operating
