Engineering, Control Systems. Test 2 – Online Maritime Tests

What is the purpose of the Main Engine Dirty Oil tank ?

To act as a drain tank of the piston rod stuffing boxes
To act as collecting tank for dirty oil from the Main Engine intended for purification
To act as collecting tank from Main Engine scavenge drains
To act as a collecting tank for all non-reusable oils

The relief valve is fitted in the position shown to prevent overpressure _____

should the actuating piston leak.
if astern is selected when the engine is moving ahead.
if the cylinder head air start valve jams in the open position.
if the main air start valve jams in the closed position.

If lub oil analysis results indicate fuel dilution what should be the first action?

Locate and rectify source of contamination.
Operate the lub oil purifier.
Renew the lub oil charge.
Take another set of samples and send off immediately.

If water is detected in the generator crankcase what is the most likely source?

Leaking tubes in oil cooler.
Leakage from the transfer passage between cylinder block and heads.
Leakage from cylinder head outlet connections.
Leakage from cracked cylinder liner or perished liner sealing rings.

When all preparations have been made to ensure that the main engine is operational prior to departure, what will be the final test to be carried out ?

Open air to engine, drain air bottles, blow indicator cocks.
Close safety valves, blow indicator cocks, fill air bottles.
Blow indicator cocks, test reversing of engine, short firing kick.
Put out the turning gear and turn the lubricators.

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