Oil Tankers. Test 11

How is the inert gas pressure controlled in the inert gas distribution line and relevant cargo tanks during discharge ?

What is the advantage of having a steam turbine driven inert gas fan on a tanker fitted with an auxiliary steam plant?

A steam turbine fan is less costly to maintain and more easy to operate.
A steam driven turbine fan does not easily trip when there is a malfunction on the inert gas plant
A steam turbine fan can give higher speeds
A steam turbine driven fan creates initial load on the boiler facilitating inert gas production

There is a requirement to maintain an Oil Record Book in order that _____

the Bill of Lading requirements can be checked and satisfied
a record is held of the amounts of oil which are loaded/discharged
disputes can be settled between terminal and vessel if there is a disparity in cargo figures
an inspection can be made by shore authorities in the event of oil spills or other pollution accidents

How is the quality and supply of inert gas checked and recorded?

Using a portable oxygen analyser and U-tube, with an officer standing-by all the time
Using a manometer and thermometer fitted in the main inert gas supply line
In the engine control room at the main inert gas console, where an engineer should be standing-by all the time
Using the oxygen content and IG pressure recorder located in the cargo control room

On tankers, the Crude Oil Washing Check List states (among other things) that during Crude Oil Washing operations _____

the quality of the inert gas must be frequently checked and recorded.
the inert gas pressure is to be recorded prior to starting washing.
the inert gas system should be in operation.
the inert gas oxygen content must be below 4.5 % in order to start or continue washing.

What is the condition of the inert gas as it is produced by the boilers or inert gas generator?

In the Inert Gas system, - what types of Deck Seal units are there?

What is the principle behind producing inert gas on board ship?

By the combustion of fuel oil to produce exhaust gases with an oxygen content of less than 5%
By the combination of water and sulphur dioxide produced by the combustion of heavy fuel
Using exhaust gases of heavy fuel oil combustion which are smothering agents at high temperatures
By using the carbon dioxide in the exhaust gas to act as a fire extinguisher

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