Oil Tankers. Test 7

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?

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
High water level / overflow alarm, high deck seal temperature, low deck seal level, low deck seal pressure
Aggregate failure, high deck seal temperature, low deck seal flow, low deck seal level.

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

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

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

Oxygen reduction is particularly likely in cargo tanks where _____

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

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 _____

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

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

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

Review Answers

Oil Tankers. Test 7

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