Engineering, Control Systems. Test 15

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

Collecting tank for all non-reusable oils.
Collecting tank for dirty oil of Main Engine intended for purification.
Collecting tank from Main Engine scavenge drains
Drain tank for the piston rod stuffing boxes.

What does a pressure drop across the scavenge air cooler indicate ?

Increased engine room temperature.
A reduced cooling water flow.
Fouling of cooler air side.
Fouling of the cooling water system.

If jacket water alkalinity keeps dropping what could be the cause?

Possible cracked liner/head or leaking head joint.
More chemical additive required.
Jacket water temperature is too high.
Circulating pump not providing sufficient flow.

What is the first indication of a broken exhaust valve spring on a Diesel engine?

Low exhaust temperature.
High exhaust temperature.
Smoking exhaust.
Blow back through the turbo charger.

What will happen to the level of the expansion tank if the engine slows down or stops?

The level will at first decrease but increases again
The level will increase
The level will decrease
Nothing will happen

Inspection of the crank bearing shows the bearing shell was black and hard with patches of black incrustations which had worn grooves in the journal. What could be the cause?

Water in the lubricating oil during service.
Dirt in the lubricating oil.
Bearing shell service time exceeded.
The wrong casting of bearing shell.

Review Answers

Engineering, Control Systems. Test 15

Engineering, Control Systems. Test 15

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