Question

Which of the following is used to open and close a gas cylinder?​

Answer 1

Answer:

Only use wrenches or tools provided by the supplier to open or close a valve. Pliers should never be used to open a cylinder valve. Fire extinguishing equipment must be present and easily accessible when combustible materials may be exposed to welding using compressed gases.

Explanation:

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Answer 2

Answer:

spindle key , wrenches or tool provided

u didn't provided options