In a Quality Control program, when should inspections be performed for concealed work such as electrical rough-in?
Correct Answer
D) Before the work is concealed and at specified hold points
Concealed work must be inspected before it becomes inaccessible, typically at specified hold points or inspection stages defined in the QC plan.
Why This Is the Correct Answer
Concealed work — such as electrical rough-in, plumbing in walls, or structural connections — must be inspected before it is covered up, because once drywall or concrete is placed, the work is inaccessible without destructive investigation. A proper QC program designates hold points at which work stops and inspection occurs before the next phase begins. This is a foundational principle of quality management and also required by most building codes.
Why the Other Options Are Wrong
Option A: After the work is completely finished
After the work is completely finished is too late for concealed work. Once walls are drywalled or slabs poured, there is no way to visually verify the rough-in without tearing out finishes. Waiting until completion defeats the purpose of a QC inspection for hidden elements.
Option B: During the final walkthrough only
During the final walkthrough only is another form of 'too late.' Final walkthroughs typically occur after all work is finished and most concealed systems are buried. The final walkthrough can only verify visible, accessible work — not what is hidden behind walls.
Option C: Only if problems are suspected
Only if problems are suspected is a reactive approach, not a proactive QC strategy. By the time problems are suspected, the work may already be concealed. QC programs are preventive by design — inspections are scheduled at predetermined points, not triggered only by suspicion.
Memory Technique
Think: 'Once it's hidden, you can't inspect it.' For concealed work, the inspection window is the narrow gap between installation and concealment. 'Hold point' = STOP before covering. Picture a red STOP sign before the drywall crew arrives.
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