What is the name of the housing of a centrifugal pump that directs the flow of water to the pump discharge?

Volute

Corrective and preventive are two types of maintenance. What is the third type?

Predictive

What is the name of the valve placed on the bottom of the suction pipe of a groundwater well pump?

Foot valve

These types of valves are used in pump suctions and are often the vertical lift disc design.

•Foot valves

•Butterfly valves

•1/4 turn plug valves

•Gate valves

Which valve listed below is primarily used as a flow control valve?

Butterfly valve

Rope type packing glands in centrifugal pump stuffing boxes should leak
how much?

One drip per second

A piece of equipment has failed at a water plant and must be repaired. What should the maintenance person do first?

Read the O&M manual

When this phenomena occurs, it sometimes is accompanied by loud noises that sound like someone is pounding on the impeller with a hammer, or the
pump is full of rocks.

Cavitation

When a piece of equipment is locked out and tagged out (LO/TO), how many people hold a key to the lock used for LO/TO?

One, the person who locked it out

What is a rule of thumb regarding the installation of rope packing into a centrifugal pump packing gland?

Never install new rings of packing on top of old packing

What type of power is usually supplied at 120 volts, has three wires or leads, two of the leads carry 120 volts each, and the remaining lead is a neutral?

Single phase power

Voltage unbalance between the three legs of power to a motor should not exceed what percent?

5%

At least 75% of centrifugal pump problems can be traced to what?

The suction side of the pump

OSHA standards require that all equipment that could unexpectedly start up or release stored energy must be what?

Locked out and tagged whenever it is worked on

Mechanical seals installed on centrifugal pump shafts should leak how much?

Mechanical seals should NOT leak

Stored energy in gas, air, water, steam and hydraulic systems must be what?

Bled of any stored energy