Question

what type of lubricant should you use when attaching pressure regulators, lines and torch body?
select one:
a. none, lubricants should never be used
b. oil
c. thread lubricants
d. pipe-fitting compounds

Explanation:

When attaching pressure regulators, lines, and torch body (related to gas handling, likely in welding or gas systems), using lubricants (especially oil) can be hazardous as it may ignite or cause issues. Thread lubricants or pipe - fitting compounds are also not suitable. So, lubricants should never be used.

Answer:

a. None, Lubricants should never be used