MS Welding Practice Questions - Mississippi Welding Contractor Examination Exam

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On oxyacetylene equipment, fuel-gas (acetylene) hose and torch fittings are made with which thread to keep them from being connected to the oxygen side?

Left-hand (reverse) threads, often with a notched nut Right-hand threads identical to oxygen fittings Metric fine threads with no handedness convention Pipe threads that seal only with Teflon tape

Correct Answer:

Left-hand (reverse) threads, often with a notched nut

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