Pumper Chapter 9

What type of pump serves a vital role in modern apparatus because of their ability ro pump air and foam? pg296

• Positive Displacement Pumps

• Centrifugal Pumps

• Single-Stage Pumps

• Multistage Pumps

From the standpoint of design, which pump is the simplest of all fire apparatus pumps? pg296

• Piston Pumps

• Rotary Pumps

• Vane Pumps

• Simple Pumps

Which of the following accurately defines the "Impeller eye"?

• The outer edge of a centrifugal pump impeller where water is expelled.

• The area surrounding the impeller where water enters the pump.

• The intake orifice located at the center of a centrifugal pump impeller.

• The part of the pump that regulates the flow of water into the impeller.

Which component of a centrifugal pump converts the velocity energy imparted by the impeller blades into pressure?

• Impeller Eye - The intake orifice at the center of the impeller.

• Diffuser - The part of the pump that regulates the flow of water into the impeller.

• Volute - The spiral, divergent chamber where velocity energy is converted into pressure.

• Casing - The outer shell of the pump that encloses the impeller and volute.

Which of the following accurately identifies the three main factors influencing a centrifugal fire pump's discharge pressure? pg300

• The size of the impeller, the pressure of the water entering the pump, and the elevation of the pump.

• The type of nozzle being used, the length of the supply hose, and the ambient temperature.

• The diameter of the discharge hose, the condition of the pump's seals, and the atmospheric pressure.

• The amount of water being discharged, the speed of the impeller, and the pressure of water entering the pump from a pressurized source.

SIngle-stage centrifugal fire pumps provide flow capabilities of up to ____ gpm. pg300

• 2250

• 2500

• 2000

• 3000

When the transfer valve is set toThis pressure position, all water from the intake manifold is directed into the eye of the first impeller. The first stage increases the pressure and discharges through the transfer valve into the eye of the second impeller. pg302

• Pumping in series (pressure) position

• Pumping in parallel (volume) position

• Pumping in hybrid (combination) position

• Pumping in sum (addition) position

Switching from volume to pressure can result in immediate ____ of the previous discharge pressure. pg302

• doubling

• tripling

• halving

• stoppage

If there is any question as to the correct position for the transfer valve, it is best to just operate in the ____ mode. pg303

• Automatic

• Combination

• Parallel

• Series

This material may be available for use in certain pumps and offers superior resistance to warping, stretching, and corrosion. pg307

• Brass

• Ceramic

• Stainless steal

• Nylon