Basic Pump Operations

1. Which of the following is the equation for determining friction loss?

• 0.5H

• CXQxL

• 29.7Xd

• Flow rate (gpm) X 100

1. The operation of a centrifugal pump is based on the principle that:

• the rotor is mounted off-center inside the housing

• a piston moves back and forth or up and down inside a cylinder.

• multiple impellers for each stage are mounted within a single housing

• a rapidly revolving disk throws water introduced at its center toward the outer edge of the disk.

1. The most common cause of inability to prime is:

• an air leak

• lift is to high

• insufficient fluid

• engine speed to low

Which of the following enhance firefighter safety and reduce the possibility of damage to the pump caused by water hammer?

• LDH valves

• Bleeder Valves

• In-line relay valves

• Intake pressure relief valves

A relay pumping operation always begins with the

• hose tender

• relay pumper

• attack pumper

• source pumper

Why is it necessary to know the amount of friction and pressure loss in fire hose?

• to produce effective fire streams

• to minimize wear and tear on fire hose

• to ensure correct choice of nozzle size and shape

• to control the amount of water flowing from a hydrant

For fire protection purposes, ordinary fresh water is generally considered to weigh?

• 5.25 pounds

• 7.26 pounds

• 8.33 pounds

• 12.8 pounds

Before placing it back in service, what should the driver/operator do any time a fire pump has been operated at draft from a static water supply?

• Flush the pump and piping

• Lubricate the pump and piping

• allow the pump and piping to air dry

• clean the pump and piping with soap and water and air dry

1. What three percentages of the pump capacity are the pumps tested at during annual pump testing?

• 25, 50, 100

• 25, 75, 100

• 50, 75, 100

• 33, 66, 100

1. On apparatus equipped with air brakes, the air pressure should build to a sufficient level to allow vehicle operations within ___ seconds of starting.

• 10

• 15

• 30

• 60