What statement representing the primary purpose of a steam trap is true?

Correct Answer: Option A — By draining the low point of a horizontal run of steam piping, a steam trap is used primarily to keep the steam line dry and eliminate water hammer.

Under USCG National Maritime Center examination standards, the accepted correct answer is: By draining the low point of a horizontal run of steam piping, a steam trap is used primarily to keep the steam line dry and eliminate water hammer..