AWWA Operational Efficiency and Maintenance 3

Question 1

In a SCADA-monitored pumping station, an alarm indicates a motor's current draw has increased 15% without a change in flow output. What does this most likely indicate?

Accepted Answer

Mechanical binding or increased friction in the pump

Answer

Increased current draw without increased flow output typically indicates mechanical problems such as bearing wear, impeller rubbing, or seal friction.

Question 2

What is the purpose of conducting a pressure zone analysis in a water distribution system?

Accepted Answer

To identify areas of excessive pressure that may cause main breaks or leaks

Answer

Pressure zone analysis identifies areas with pressures that exceed pipe ratings, increasing the risk of main breaks, leaks, and customer complaints.

Question 3

Which AWWA standard addresses the installation and maintenance of fire hydrants?

Accepted Answer

AWWA C502

Answer

AWWA C502 covers dry-barrel fire hydrants, including design, materials, and installation requirements.

Question 4

A utility tracks its Infrastructure Leakage Index (ILI). A value of 1.0 indicates what about the system?

Accepted Answer

Current real losses equal the theoretical minimum unavoidable losses

Answer

An ILI of 1.0 means the system's actual real losses equal the Unavoidable Annual Real Losses (UARL), representing theoretical best performance.

Question 5

When performing a hydrant flow test, the hydrant nearest the test point is called the:

Accepted Answer

Residual hydrant

Answer

The residual hydrant is the closest hydrant to the test point where pressure is measured during flow from the flow hydrant(s).

(AWWA) American Water Works Association Practice Test

(AWWA) American Water Works Association Practice Test

AWWA Operational Efficiency and Maintenance 3