CPWM Infrastructure Management 3 — Questions and Answers
Question 1: A water main break in a busy downtown corridor requires immediate isolation. What is the FIRST action a public works manager should take?
- Issue a press release to the media
- Locate and close the nearest upstream and downstream isolation valves (Correct answer)
- Call the mayor's office for authorization
- Begin excavation immediately without further assessment
Correct answer: Locate and close the nearest upstream and downstream isolation valves
Isolating the break by closing adjacent valves stops water loss and protects the public before any other response action is taken.
Question 2: In traffic engineering, the Highway Capacity Manual (HCM) defines Level of Service 'F' as:
- Free-flow conditions with minimal delay
- Stable flow at or near design capacity
- Unstable flow with some delay at intersections
- Forced or breakdown flow exceeding capacity (Correct answer)
Correct answer: Forced or breakdown flow exceeding capacity
LOS F represents forced or breakdown flow where demand exceeds capacity, resulting in unacceptable delays and congestion.
Question 3: Which federal act requires public agencies to develop and implement Stormwater Pollution Prevention Plans (SWPPPs) for construction sites disturbing one or more acres?
- Clean Air Act
- National Environmental Policy Act (NEPA)
- Clean Water Act (CWA) through NPDES permit requirements (Correct answer)
- Solid Waste Disposal Act
Correct answer: Clean Water Act (CWA) through NPDES permit requirements
The Clean Water Act's NPDES stormwater program requires SWPPPs for construction sites disturbing one or more acres to control runoff pollution.
Question 4: A public works manager reviewing bridge inspection reports should be most concerned about a beam rated with what AASHTO General Appraisal rating?
- 8 - Very Good
- 6 - Satisfactory
- 4 - Poor
- 2 - Critical (Correct answer)
Correct answer: 2 - Critical
An AASHTO rating of 2 indicates critical condition with potential imminent failure, requiring immediate action to protect public safety.
Question 5: Geographic Information Systems (GIS) are used in public works infrastructure management primarily to:
- Replace the need for field surveys entirely
- Spatially map, analyze, and manage asset location and condition data (Correct answer)
- Automate procurement and vendor selection
- Generate employee performance reviews
Correct answer: Spatially map, analyze, and manage asset location and condition data
GIS enables public works agencies to map assets, perform spatial analysis, and integrate location-based data for better infrastructure decisions.
Question 6: Which maintenance strategy defers work to the point of failure rather than scheduling it preventively, and is generally discouraged for critical infrastructure?
- Predictive maintenance
- Preventive maintenance
- Reactive (run-to-failure) maintenance (Correct answer)
- Condition-based maintenance
Correct answer: Reactive (run-to-failure) maintenance
Reactive or run-to-failure maintenance only addresses problems after failure occurs, which is costly and dangerous for critical public infrastructure.
Question 7: When scoping a road rehabilitation project, a public works manager discovers utilities located in the right-of-way that conflict with the design. The BEST first action is to:
- Redesign the road to avoid all utilities at any cost
- Notify utility owners early and conduct a utility coordination meeting (Correct answer)
- Proceed with construction and handle conflicts as encountered
- Require utilities to relocate at their own expense without discussion
Correct answer: Notify utility owners early and conduct a utility coordination meeting
Early utility notification and coordination meetings minimize costly conflicts, delays, and change orders during construction.
CPWM Infrastructure Management 3
A water main break in a busy downtown corridor requires immediate isolation.
What is the FIRST action a public works manager should take?