Fire Pump Math

The net pressure or net head is defined as ______ at it's rated capacity and rated RPM for the pump.

• what the pump is producing

• what the discharge gauge pressure is reading

• what the water supply is producing

• what the pump supply pressure is

To evaluate a fire pump's performance during the initial installation acceptance test, a curve that consists of the flow rate data obtained during testing is compared to _____.

• the fire pump manufacturer's supplied curve

• a curve from similar fire pump installations

• a curve supplied by the insurance company

• a curve from the building owner

The net output (or net pressure) is determined by _____.

• subtracting suction pressure from discharge pressure readings

• adding suction and discharge pressures together

• dividing discharge pressure by the suction pressures

• multiplying the suction and discharge pressures

The feet-head relationship can be described as follows: If you pit 1 lb. of water into a long, narrow vertical tube, the water would rise to a height of approximately ____ feet.

• 2.31

• .433

• 10

• 231

A pitot tube or "playpipes" can be used for flow testing during a fire pump test, by placing a pitot qauge in the stream of water produced. The pressure reading produced by the pitot qauge is ______ pressure.

• pitot

• qauge

• suction

• static

According to the presentation, 1 cubic foot of water weighs about _______ lbs.

• 12.1

• 62.4

• 100

• 144

For a passing fire pump acceptance test, the pump must produce at least _____% of rated head at 150%.

• 25

• 50

• 65

• 100

A square foot of area is ____ square inches.

• 12

• 24

• 100

• 144

Feet of head can be converted to psi by _____.

• multiplying the feet of head by .433

• dividing the feet of head by .433

• adding .433 to the feet of head

• subtracting .433 from the feet of head

Feet of head can also be converted to psi by _____.

• adding 231 to the feet of head

• dividing feet of head by 2.31

• subtracting 2.31 from feet of head

• multiplying feet of head by 2.31