Engineering, Control Systems. Test 2

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

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

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 ?

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

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

To act as a collecting tank for all non-reusable oils
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 drain tank of the piston rod stuffing boxes

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

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

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.
Take another set of samples and send off immediately.
Renew the lub oil charge.

Review Answers

Engineering, Control Systems. Test 2

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