Quality Control & Inspection Flashcards
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Read the first 7 Quality Control & Inspection flashcards as text
Which statement best distinguishes quality assurance (QA) from quality control (QC) on a construction project?
Answer: QA focuses on planned processes that prevent defects, while QC inspects and tests the work to detect defects
QA is process-oriented and preventive, while QC is product-oriented verification through inspection and testing.
Which ASTM standard governs the slump test used to measure the consistency of fresh concrete?
Answer: ASTM C143
ASTM C143 is the standard test method for slump of hydraulic-cement concrete.
At what age are concrete cylinders most commonly tested to verify specified compressive strength (f'c)?
Answer: 28 days
Specified compressive strength is typically evaluated at 28 days unless the specs state otherwise.
In an inspection and test plan, what is a 'hold point'?
Answer: A mandatory stop where work cannot proceed until the required inspection is performed and released
A hold point requires inspection and release before work continues, unlike a witness point.
What is the primary purpose of a nonconformance report (NCR)?
Answer: To document work or material that does not meet requirements and track its disposition
An NCR records the deficiency and its resolution, such as rework, repair, or use-as-is with approval.
Why do specifications frequently require a mock-up of a masonry or curtain wall assembly before production work?
Answer: To establish an approved standard of quality, appearance, and workmanship for the actual work
An approved mock-up becomes the benchmark against which the installed work is judged.
The U.S. Army Corps of Engineers three-phase control system consists of which phases?
Answer: Preparatory, initial, and follow-up
USACE QC uses preparatory, initial, and follow-up inspections for each definable feature of work.
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