When piston rod packing persists in leaking on a reciprocating steam pump, the cause may be __________.

Correct Answer: Option D — misalignment of the crosshead guide

In USCG Marine Engineering General Subjects, for engine room systems involving 'When piston rod packing persists in leaking on a reciprocating steam pump, the cause may be', the standard operating requirement is: 'misalignment of the crosshead guide'.