Auxiliary Machinery. Test 21 – Online Maritime Tests

The cooling water temperatures in and out of the engine become too high. What is the most probably reason for this?

The control valve for the cooling water cooler is sticking.
Fouled cooling water system.
The temperature in the engine room is too high.
The lubricating oil has too high temperature.

In a series installation of a purifier and a clarifier, what is the purpose of the clarifier

In case the gravity disc is too small
You will probably have less alarms
To get round the problem of fluctuating temperature
As a safety net, for improved cleaning of the fuel oil

Some 4-stroke engines are fitted with a rotorcap on the cylinder head valves. For what reason?

Improve the scaling surface function, increase the service time of the exhaust valve in the engine.
Distribute the exhaust gas or the air inlet better to improve combustion.
To prevent the valve spindel to stick _____
Rotate the inlet valve during operation.

If there is never any water in the lubricating oil, why must we add water to the self cleaning separator bowl

To keep the interface in correct position
To clean the disc stack
To enable the transducer to get an accurate reference value
To minimise oil losses and prevent the sludge getting too hard

The cooling water temperature out of the engine becomes too high. Everything else is normal. What is the reason for this?

Too high temperature in the charging air.
Air in the cooling water system.
Overload of the engine.
Any of the others.

On the air compressor's crankcase there is a small valve that lets off overpressure. What do we have to do if this valve is letting off pressure and oil moisture ?

Check the clearance in the bearings.
Overhaul the compressor unit.
Block the valve because it pollutes the engine room (block off the valve).
Increase the flow of cooling water.

If oil flows out of the bowl casing drain of a solids ejecting separator what is the most likely problem

Insufficient amount of bowl closing water
The sludge tank is full
Oil has been fed to the separator before full speed
The flow rate is too high

In a purifier assuming the separating temperature is correct, what is probably wrong if processed oil contains water

Gravity disc is too small. Flow rate is too high
Back pressure is too high
Gravity disc is too small
Gravity disc is too large

The cooling water temperature out of the engine becomes too high. Everything else is normal. What is the reason for this?

Low level in the expansion tank.
Seawater is leaking in to the fresh water in the cooler.
Fouled cooling water system.
The amount of additives in the cooling water is insufficient.

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