GCC Quality Control & Inspection 5

Question 1

A QC inspector finds that a structural steel weld has visible surface porosity. Which standard's visual inspection criteria apply?

Accepted Answer

AWS D1.1 limits size and frequency of surface porosity and may require repair depending on extent

Answer

AWS D1.1 specifies visual acceptance criteria for weld discontinuities including surface porosity, with limits on size and distribution; violations require repair before the weld is accepted.

Question 2

What is the purpose of moisture testing flooring substrates before installing adhesive-bonded flooring systems?

Accepted Answer

To prevent adhesive bond failure, bubbling, and mold growth caused by excess moisture vapor transmission

Answer

Excess moisture vapor from concrete substrates can break down adhesives, cause flooring to bubble or delaminate, and create conditions for mold growth beneath flooring systems.

Question 3

On a project using special inspections per IBC Chapter 17, who is responsible for hiring the special inspector?

Accepted Answer

The owner retains the special inspector, independent of the contractor

Answer

IBC Chapter 17 requires the owner to retain the special inspector to ensure inspector independence from the contractor whose work is being inspected.

Question 4

Which testing method is used to verify the in-place density of compacted soil and fill material in the field?

Accepted Answer

Nuclear density gauge or sand cone test compared to Proctor maximum dry density

Answer

Field density testing using a nuclear gauge or sand cone method measures in-place dry density and moisture content, compared to laboratory Proctor maximum density to calculate percent compaction.

Question 5

A general contractor's quality control plan should include which of the following key elements?

Accepted Answer

Inspection procedures, hold points, testing requirements, NCR process, and documentation protocols

Answer

A complete QC plan addresses inspection procedures, hold and witness points, required testing, the NCR tracking system, and how all quality-related documentation is controlled and retained.

(GCC) General Contracting Certification Practice Test

(GCC) General Contracting Certification Practice Test

GCC Quality Control & Inspection 5