CPWM Utility Systems 5

Question 1

What is the primary regulatory standard for lead and copper in drinking water under the EPA's Lead and Copper Rule?

Accepted Answer

Action level of 15 ppb for lead at the 90th percentile of tap samples

Answer

The Lead and Copper Rule establishes an action level of 15 ppb for lead; if exceeded at the 90th percentile of tap samples, utilities must take corrective action.

Question 2

A public works department is planning a new water storage tank. Which siting consideration is MOST critical for maintaining adequate system pressure?

Accepted Answer

Tank overflow elevation relative to the pressure zone's required service pressure

Answer

The overflow elevation determines the hydraulic grade line for the pressure zone; the tank must be sited high enough to provide minimum required pressure (typically 35-40 psi) at the highest service point.

Question 3

Which type of sewer system is specifically designed to carry ONLY stormwater runoff?

Accepted Answer

Municipal separate storm sewer system (MS4)

Answer

MS4s are designed exclusively to convey stormwater from impervious surfaces to receiving waters and are regulated under NPDES Phase I and Phase II permits.

Question 4

A gas distribution system experiences a sudden pressure drop across a large service area. What is the FIRST action a public works manager should take?

Accepted Answer

Initiate emergency response, isolate the affected area, and check for leaks or main breaks

Answer

Sudden system-wide pressure loss suggests a major leak or main break; immediate emergency response to isolate and investigate protects public safety above all other priorities.

Question 5

What is the purpose of a 'valve exercising program' in a water distribution system?

Accepted Answer

To regularly operate valves to ensure they function properly and can be closed during emergencies

Answer

Valve exercising programs periodically turn each valve to ensure it operates correctly and can be fully closed when needed during main breaks or planned shutdowns.

(CPWM) Certified Public Works Manager Practice Test

(CPWM) Certified Public Works Manager Practice Test

CPWM Utility Systems 5