What statement representing the primary purpose of a steam trap is true?
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.
By draining the high point of a horizontal run of steam piping, a steam trap is used primarily to keep the steam line dry and eliminate water hammer.
By draining the high point of a vertical run of steam piping, a steam trap is used primarily to keep the steam line dry and eliminate water hammer.
By draining the low point of a horizontal run of steam piping, a steam trap is used primarily to insure good heat transfer efficiency.
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