CPII Construction Inspection Techniques 3

Question 1

When performing a visual weld inspection, a linear discontinuity running parallel to the weld axis on the weld face is most likely which type of defect?

Accepted Answer

Longitudinal crack

Answer

A linear discontinuity running parallel to the weld axis on the weld face is characteristic of a longitudinal crack, which is a serious structural defect requiring rejection and repair.

Question 2

An inspector is reviewing shop drawings for a precast concrete structure. What is the primary purpose of reviewing shop drawings during construction inspection?

Accepted Answer

To verify that the contractor's proposed fabrication details conform to the contract documents

Answer

Shop drawing review confirms that the contractor's interpretation and fabrication details comply with the engineer's design intent as expressed in the contract documents.

Question 3

Which ASTM standard governs the standard practice for sampling freshly mixed concrete?

Accepted Answer

ASTM C172

Answer

ASTM C172 covers the standard practice for sampling freshly mixed concrete to obtain representative samples for testing of properties such as slump, air content, and temperature.

Question 4

During earthwork inspection, a nuclear density gauge shows 91% relative compaction where 95% is specified. What action is required?

Accepted Answer

Require the contractor to re-compact the failing area and retest until specification is met

Answer

Failing compaction tests require the contractor to re-compact the deficient area and perform additional testing until the specified density is achieved before proceeding.

Question 5

What is the purpose of performing an air content test on fresh concrete intended for an exposed exterior application in a freeze-thaw environment?

Accepted Answer

To verify that adequate entrained air is present to resist freeze-thaw deterioration

Answer

Entrained air creates microscopic bubbles that relieve hydraulic pressure from freezing water, protecting the concrete matrix from freeze-thaw deterioration and scaling.

(CPII) Certified Public Infrastructure Inspector Practice Test

(CPII) Certified Public Infrastructure Inspector Practice Test

CPII Construction Inspection Techniques 3