CME CME Water & Wastewater Systems

Question 1

What design standard is most commonly used for potable water distribution system hydraulics in the US?

Accepted Answer

Ten States Standards (Recommended Standards for Water Works)

Answer

AWWA Manual M31

Answer

ASCE 7

Answer

NFPA 13

Question 2

Which federal regulation sets the primary drinking water standards that municipal water systems must meet?

Accepted Answer

Safe Drinking Water Act (SDWA)

Answer

Clean Water Act

Answer

Resource Conservation and Recovery Act

Answer

National Environmental Policy Act

Question 3

What is the minimum residual chlorine level (free chlorine) EPA recommends maintaining throughout a distribution system?

Accepted Answer

0.2 mg/L

Answer

0.01 mg/L

Answer

1.0 mg/L

Answer

2.0 mg/L

Question 4

What does the Hazen-Williams equation calculate in water distribution design?

Accepted Answer

Head loss due to friction in pipes carrying water

Answer

Pump power requirements

Answer

Water treatment chemical doses

Answer

Reservoir storage volume

Question 5

What is the primary purpose of a water system's storage tank (elevated or ground-level)?

Accepted Answer

Equalize diurnal demand fluctuations and provide emergency fire flow storage

Answer

Chemical treatment of water

Answer

Pump station surge control only

Answer

Backflow prevention

Question 6

Under the Lead and Copper Rule (LCR), what action level for lead triggers required system mitigation?

Accepted Answer

15 µg/L

Answer

0 µg/L (any detection)

Answer

5 µg/L

Answer

50 µg/L