Conversions
Pump Math
Friction Loss
Elevation
Fireground Math
100

There are 12 inches in this many feet.

What is 1 foot?

100

Two attack lines each flow 150 GPM. What is the total flow?

What is 300 GPM?

100

Friction loss increases as hose length does this.

What is increases?

100

Every 10 feet of elevation change equals approximately this many psi.

What is 5 psi?

100

A 1¾-inch preconnect flows 150 GPM. In 2 minutes it uses this many gallons.

What is 300 gallons?

200

One gallon of water weighs approximately this many pounds.

What is 8.34 pounds?

200

A tank holds 750 gallons. At 250 GPM, it will last this many minutes.

What is 3 minutes?

200

Doubling the hose length doubles this.

What is friction loss?

200

Water flowing uphill requires the pump operator to do this.

What is increase pump pressure?

200

A hydrant is supplying 750 GPM. In 10 minutes it delivers this many gallons.

What is 7,500 gallons?

300

500 gallons is this many cubic feet (1 cubic foot = 7.48 gallons).
 

What is approximately 66.8 cubic feet?

300

A 500-gallon tank is supplying a line flowing 125 GPM. How long before the tank is empty?

What is 4 minutes?

300

If one 200-foot hose has 20 psi friction loss, two 200-foot sections have approximately this much

What is 40 psi?

300

Water flowing downhill requires the pump operator to do this.

What is decrease pump pressure?

300

Three engines each dump 2,000 gallons into a portable tank. How much water is available?

What is 6,000 gallons?

400

Convert 150 psi to kPa. (1 psi = 6.895 kPa)

What is approximately 1,034 kPa?

400

Three attack lines each flow 185 GPM. What is the total GPM?

What is 555 GPM?

400

Appliance loss for a gated wye flowing over 350 GPM is generally this many psi.

What is 10 psi?

400

A nozzle is 30 feet above the engine. How much pressure is added for elevation?

What is 15 psi?

400

A portable tank contains 3,000 gallons. A scene is flowing 500 GPM. How long will the tank last if no additional water arrives?

What is 6 minutes?

500

A 2½-inch hose flowing 250 GPM for 4 minutes delivers this many gallons.

What is 1,000 gallons?

500

You are flowing 1,000 GPM. How many gallons are used in 7 minutes?

What is 7,000 gallons?

500

Pump discharge pressure equals nozzle pressure plus friction loss plus this.

What is elevation pressure (and appliance loss, if applicable)?

500

A master stream is 50 feet above the engine. Elevation pressure is this.

What is 25 psi?

500

A 1,000-gallon booster tank is supplying two attack lines flowing 150 GPM each. Approximately how long before the tank runs dry?

 What is 3 minutes 20 seconds?