CPII Construction Inspection Techniques 4

Question 1

When inspecting reinforcing steel prior to concrete placement, which condition is acceptable per standard specifications?

Accepted Answer

Rebar with mill scale and slight rust without pitting or loose flakes

Answer

Light rust and mill scale on rebar are generally acceptable and can actually improve bond to concrete, whereas oil, heavy mud, or corrosion pitting that reduces cross-section must be corrected.

Question 2

What is the minimum curing period typically specified for portland cement concrete flatwork exposed to moderate temperatures to achieve adequate strength development?

Accepted Answer

7 days

Answer

A minimum curing period of 7 days is commonly specified for portland cement concrete to ensure adequate strength gain and durability through continued cement hydration.

Question 3

An inspector observes formwork for a concrete retaining wall being stripped after only 18 hours, while the specification requires 72-hour minimum. What should the inspector do?

Accepted Answer

Issue a stop-work notice for that activity and document the violation

Answer

Premature formwork removal is a specification violation that can compromise concrete strength and structural integrity, requiring a formal stop-work action and documentation.

Question 4

When inspecting asphalt pavement during placement, the inspector notes the mat temperature has dropped below the minimum specified compaction temperature before rolling is complete. What is the likely consequence?

Accepted Answer

Inadequate compaction will result in an in-place density below specification

Answer

Cold asphalt is stiffer and resists compaction, resulting in insufficient density that leads to premature pavement distress, rutting, and reduced service life.

Question 5

During a storm drain inspection, an inspector uses a laser level to check pipe slope. The measured slope is 0.45% where 0.50% minimum is specified. What is the appropriate response?

Accepted Answer

Reject the pipe installation and require re-grading to meet the minimum specified slope

Answer

Pipe slope below the specified minimum is a nonconformance that must be corrected before backfill, as insufficient slope can cause sediment deposition and reduced system capacity.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Construction Inspection Techniques 4