CPII Utility Systems 4

Question 1

What is the primary purpose of a low-pressure air test on a newly installed sanitary sewer pipe?

Accepted Answer

Detect leaks and verify joint integrity before backfill

Answer

A low-pressure air test pressurizes the pipe to detect leaks at joints or the pipe body before the trench is backfilled and defects become inaccessible.

Question 2

During an electrical utility vault inspection, standing water is present at the floor. What is the primary hazard?

Accepted Answer

Electrocution risk from energized conductors

Answer

Standing water in an energized electrical vault creates an immediate electrocution hazard and must be pumped out before any personnel enter.

Question 3

Which flow measurement method is most appropriate for measuring discharge from a small stormwater outfall with irregular channel shape?

Accepted Answer

Velocity-area method with a current meter

Answer

The velocity-area method using a current meter works in natural or irregular channels without requiring installation of a fixed structure.

Question 4

What is the significance of the 'pipe zone' in utility trench construction?

Accepted Answer

The bedding, haunch, and initial backfill region critical to pipe support

Answer

The pipe zone—comprising bedding, haunching, and initial backfill to 12 inches above the pipe—provides the structural support that determines flexible pipe deflection performance.

Question 5

A water service line is found to be made of lead during a residential inspection. What is the recommended action per EPA guidelines?

Accepted Answer

Replace the lead service line as soon as feasible

Answer

EPA's Lead and Copper Rule Revisions require utilities to replace lead service lines because no safe exposure level to lead in drinking water exists.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Utility Systems 4