Ship Operations. Test 6

When is it necessary to run two pumps or more in parallel?

When the capacity requirement is higher than the performance of one centrifugal pump.
To maintain a certain manifold pressure.
When ordered from the terminal.
To double up the delivery capacity.

What are we using the ASTM table 53A/B for?

With given density at observed temperature we find a corresponding density at 15 degrees Centigrade.
Convert API to metric tonnes.
To find the corresponding correction factor.
Convert long tons to U.S.BBLs.

When handling and connecting cargo hoses between ships you might be required to have a ' bend ' in the hose when it is suspended. The minimum radius of the bend is governed by the diameter of the hose and is generally calculated as:

20 times the hose diameter.
3 times the hose diameter.
6 times the hose diameter.
9 times the hose diameter.

Where can you find the requirements regarding the number of persons required on duty during oil transfer ?

International Safety Guide for Oil Tankers and Terminals (ISGOTT)
Oil Transfer Procedure manual
IOPP certificate. ( International Oil Pollution Prevention )
Oil Record Book

Not all crude oils can be used for crude oil washing. What is the common recommendation to use a crude oil for washing.

As long as the oil is floating.
The temperature must at all times be 25 degrees Centigrade above the oil
The temperature must at all times be 10 degrees Centigrade above the oil
Depends on the oil

The driving water pressure is very important to maintain good efficiency when using the ejector for stripping. Where can you find information on board telling you the recommended pressure?

No special recommendation.
It all depends on the cargo.
The ship
It is stamped on the ejector device.

What does wet washing mean?

Dry top washing and wet bottom washing.
The oil is too
The bottom washing starts whilst there is still a small amount of cargo in the tank.
Start the wet crude on washing on a dry bottom.

Before commencing ballasting for departure, the cargo tanks are surveyed. The small amounts of cargo left in the cargo tanks are called ROB. What does this mean?

Remaining on board.
Remnants on board.
Residues on board.
Remaining oil/ballast.

When filling departure ballast on a clean ballast tanker, which valve is the last to be opened after the pump has started (M/T

The sea chest valve.
The pump
The tank
The bulkhead valve.

Review Answers

Ship Operations. Test 6

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