Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?
A
Oil is sprayed through nozzles at the point or gear mesh
B
Oil rings in channels outside the geras dip into oil in the sump and carry it to the gear teeth
C
The geras run through an open oil sump and oil is carried along on the gear teeth
D
Oil is pressure fed through internal drilled passages which force oil to the gears periphery
E
None of them
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