Question

threads on acetylene hoses are ______ so you can not confuse them with oxygen hoses.
select one:
○ a. left handed
○ b. unified coarse
○ c. unified fine
○ d. right handed

Explanation:

In welding safety and equipment, acetylene hoses have left - handed (reverse) threads to prevent confusion with oxygen hoses (which typically have right - handed threads). This is a safety feature to avoid incorrect connections. So the correct option is a.

Answer:

a. Left handed