Fuel, Ballast Operations. Test 1 – Online Maritime Tests

You are going to do deballasting of a double bottom tank. The pump is of centrifugal type and mounted above tank level. You are having problems getting the pump to take suction. What can you do to solve the problem?

Feed the pump from the sea water inlet pipe.
Repeat start and stop of the pump until it gets suction.
Disconect the manometer pipe to get rid of an air pocket .
Get somebody to do the job for you.

Concerning the designing and construction of Machinery Space Oily Residue Tanks (Sludge Tanks) what requirements, besides capacity, need to be met ?

They must have cleaning facilities and arrangements to discharge to reception facilities.
All engine room overflows and leakage tanks must drain into them _____
They must have steaming out and pumping out connections fitted.
They must be capable of being pumped overboard through a 15ppm separating system.

After bunkering when all the fuel oil tanks have been topped off, which of the listed procedures should be followed next ?

The tanks should be marked with a bull stamp on the manifold filling valve.
The pressure vacuum relief valves should be reset.
The tanks should be sounded to make sure the levels are not rising.
All of these.

A pump can empty a tank in 12 hours, another pump can empty the same tank in 4 hours, and another can empty this tank in 9 hours. If all three pumps are used together, how long would it take to empty it ?

2 and 1/4 hours
2 hours
3 hours
4/9 hours

If when in port there is an urgent need to pump bilge water from the vessel, what would you do ?

Authorise pumping the bilges over the side via the oily water separator.
Instruct the watchkeeper to lower the bilges only during night time.
Instruct the watchkeeper to pump bilges to the dirty oil tank or sludge tank and note in logbook
Issue strict instructions that the bilges must only be discharged to a shore tank or barge facility.

If you have an overflow to deck, and the result is pollution to the environment, what should you do?

Using strong chemicals to try to cope with the pollution by yourself to avoid costs and fine for the vessel
A lot of the rules are to strict, and I am using my own judgement to cope with the situation that have arisen
Hose down the deck to get rid of the oil
Immediately notify the captain so he can notify the proper authorities, so the pollution can be dealt with by professionals

Your ship receives HFO with high density from the last bunkering. What will You do to obtain the best purifying result?

According to the nomograms You select a gravity disc with larger hole diameter.
Preheat the HFO before the purifier.
This make no difference for the result.
You start the purifier with a smaller disc.

During cargo and/or bunkering-operations you have all scuppers closed. It starts raining and there is a slight oilsheen on the water on deck. What to do?

Drain the water into the sloptank
Open the scuppers during raining and when the deck is empty, plug the scuppers again
Drain the water easy out through the scuppers
Let it pass over the waterboard

What will cause the oil/water interface in this centrifugal separator to move outwards from its correct position?

An increase in the oil flow rate.
An increase in the temperature of the oil.
An decrease in the temperature of the oil.
A decrease in the viscosity of the oil.

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