A domestic water riser is insulated before the pressure test is witnessed. A leak later appears behind the insulation. What quality step was missed?
Correct Answer
A) Pressure testing and inspection should be completed before insulation conceals joints
Piping should be tested and accepted before insulation or finishes conceal joints. Other choices hide the defect or incorrectly limit testing.
Why This Is the Correct Answer
Piping should be tested and accepted before insulation or finishes conceal joints. Other choices hide the defect or incorrectly limit testing.
Why the Other Options Are Wrong
Option B: Make insulation should be thicker the answer for plumbing pressure test
The trap in B is Insulation should be thicker. That selection is wrong because it answers the Plumbing pressure test prompt with the wrong practical move.
Option C: The leak should be ignored until ceiling tile is installed
Choice C gives The leak should be ignored until ceiling tile is installed. Its specific error: it leaves the work at an informal or incomplete stage, while Plumbing pressure test requires Pressure testing and inspection should be completed before insulation conceals joints.
Option D: Limit plumbing pressure test to hot water lines require testing only
Choice D (Only hot water lines require testing) is rejected because the option delays or omits the controlling step.
Memory Technique
Tag the scene with plumbing pressure test: wrong actor or wrong timing means the fix is not Pressure testing and inspection should be completed before insulation conceals joints.
Reference Hint
Open Mechanical and Electrical Systems for Construction Managers, 4th Ed., 2024; use the index entry or section for "Piping pressure testing before concealment" to confirm that Piping should be tested and accepted before insulation or finishes conceal joints.
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