The compressor on the ships service refrigeration system starts up but stops after a brief period of running. Subsequent attempts to start it produce no result. What control component would you suspect?

Correct Answer: Option C — The lube oil differential pressure switch.

Lube oil differential pressure switches feature a timed safety delay for startup. If functional oil pressure fails to establish within the timed window, the switch trips, stopping the compressor and locking out subsequent restart attempts.