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Sheet Metal
Sheet Metal Worker Red Seal Certification
Materials & Properties
Knowledge Check
Materials & Properties
Knowledge Check
Knowledge Check
1 / 10
What causes oil canning in sheet metal ductwork panels?
A
Thermal contraction of the duct during cold weather
B
Overheating the galvanized coating during welding
C
Excessive oil contamination on the metal surface during fabrication
D
Large flat unsupported areas flexing under pressure or vibration
Check Answer
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