Ch. 8 - Fireground Hydraulic Calculations

Flowmeters are especially advantageous when automatic nozzles are employed with handlines or master stream devices because automatic nozzles may lead driver/operators to:

Supply insufficient discharge pressures, creating low gpm (lpm) flow

Which statement about electronic hydraulic calculators is MOST accurate?

Once variables have been entered, the calculator applies preprogrammed formulas to arrive at pump discharge pressure

The condensed Q formula may be used for operations in which the friction loss can be determined for:

3, 4, or 5 inch hose

The D/O must consider that when a standpipe or hoseline is charged, there:

Is no flow through the system or hose layout until the nozzle is opened

Which is MOST likely to be the cause if a driver/operator receives a message from an attack team that the volume of water at the nozzle has suddenly decreased without a corresponding change at the flowmeter?

A hoseline may have burst

Which statement about the flowmeter is MOST accurate?

It relieves you from relying on calculations based on friction loss, elevation pressure, and length of hoseline

Which is a guideline for initial calculations when developing a customized pump chart?

Include friction loss for master stream appliances

Electronic hydraulic calculators may be handheld or may be:

Permanently affixed to a location near the pump operator's panel

Which statement about pump charts is MOST accurate?

They contain information specific to a jurisdiction's equipment and common hose layout operations

Which type of flowmeter employs a stainless-steel spring probe to detect water movement in discharge piping?

Spring probe