Oil Tankers. Test 7

Oxygen reduction is particularly likely in cargo tanks where _____

the tanks have been empty for a long period of time
the tanks have just been cleaned
the vessel is operating in warm weather conditions
inert gas or steam have just been used

Small oil spills on deck can be prevented from going overboard by _____

closing sighting ports on tank lids
plugging the scuppers
plugging sounding pipes
placing wooden plugs in the vents

If a combination carrier is engaged in the carriage of cargoes other than oil, the main inert gas supply line on deck (with the exception of the inert gas supply to the slop tanks) must be _____

isolated by fitting a blind flange.
removed.
secured by padlocking the inert gas main supply valve.
drained and washed.

At what pressures are P/V valves usually set to open in relation to atmospheric pressure?

2 PSI above / 0,5 PSI below?
1 PSI above / 1 PSI below?
3 PSI above / 4 PSI below?
P/V valves are not required.

What protective devices are fitted to the seawater supply to the deck seal, ensuring an effective water barrier in the deck seal and preventing gas backflow to the engine room?

Aggregate failure, high deck seal temperature, low deck seal flow, low deck seal level.
High water level / overflow alarm, high deck seal temperature, low deck seal level, low deck seal pressure
A booster aggregate for the sea water, deck seal high temperature alarm, high water level/overflow alarm.
Deck seal pump failure, low deck seal water pressure, low deck seal water flow, low level of deck seal

Which pair of devices is fitted on deck to prevent inert gas or cargo vapours from flowing back into the engine room?

The non-return valve, the deck seal
The bulkhead valve, the deck seal
The bulkhead valve, the non-return valve
The spectacle flange, the Bernoulli tube

Review Answers

Oil Tankers. Test 7

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