GCC Quality Control & Inspection 3

Question 1

Which type of weld inspection method uses high-frequency sound waves to detect internal defects without damaging the weld?

Accepted Answer

Ultrasonic testing (UT)

Answer

Ultrasonic testing uses high-frequency sound waves transmitted through the weld to detect internal discontinuities such as cracks, lack of fusion, and porosity.

Question 2

A QC inspector is reviewing a concrete batch ticket. Which piece of information is MOST critical for verifying mix design compliance?

Accepted Answer

The water-to-cementitious materials (w/cm) ratio and total water added

Answer

The water-to-cementitious materials ratio is the single most important factor controlling concrete strength and durability, so verifying it against the mix design is critical.

Question 3

What does the term 'first article inspection' mean in a construction quality context?

Accepted Answer

A thorough inspection of the first completed unit of repetitive work to set the standard for all subsequent work

Answer

First article inspection evaluates the first completed instance of repetitive work to confirm quality before mass production or installation proceeds.

Question 4

Under ACI 318, if the average of three consecutive compressive strength test cylinders falls below f'c, what action is required?

Accepted Answer

Investigation and potential coring of the in-place concrete to verify structural adequacy

Answer

ACI 318 requires investigation of the cause of low strength results and may require drilling and testing cores from in-place concrete to determine actual strength and structural adequacy.

Question 5

What is the primary purpose of maintaining a 'material traceability' system on a project?

Accepted Answer

To link installed materials to certifications, test reports, and batch numbers for accountability

Answer

Material traceability links physical installed materials to their mill certificates, test reports, and lot numbers, enabling accountability if a defect or failure is later discovered.

(GCC) General Contracting Certification Practice Test

(GCC) General Contracting Certification Practice Test

GCC Quality Control & Inspection 3