Ship Operations. Test 3 – Online Maritime Tests

You have just discharged a Category 'A' chemical cargo and are making the first wash of the tank that had contained it. The washing contain a chemical residual concentration of over 0.1% by weight. You can:

Discharge the washing to shore reception facilities only?
Discharge the washing to sea only if you are outside a special area?
Discharge the washing to sea directly?
Discharge the washing to sea only if you are outside a special area, your speed exceeds 7 knots, depth of water exceeds 25 metres and distance from land exceeds 12 miles?

When cleaning stainless steel tanks, it is generally required that the last water wash be of fresh water to avoid salt water or chloride damage. However, if you took fresh water from ashore and found the water chlorinated for disinfection purpose, you would:

Not use the water as it may cause damage to the stainless steel?
Normally use it, as free or dissolved chlorine is not aggressive towards stainless steel?
Use it, but only after mixing a neutralising agent in it?
Use it, but only if it's temperature is below 30

When loading cargo, once it has been established that cargo is entering the correct tank and line integrity is OK, loading rates should be increased to:

As fast as the terminal can pump the cargo?
A rate as per the loading Master decision?
Match the size and capacity of the ship's loading line, venting system and static generation hazard limitation, if any?
Strictly as per the Charter party maximum required rate?

Which of the following alternatives are recommended when decanting water overboard from the sloptank?

Discharge under the waterline to avoid any sheen on the surface
Using dispersing chemicals in the sloptank
Maintain a speed of at least 12 knots when pumping overboard
Leave a 'cushion'of water in the sloptank, to minimize the risk of polluting the sea

You are ready to start crude oil washing of a cargo tank. What measurement(s) must be performed before you start?

Measurement of the oxygen level one meter below deck in the tank to be washed.
Measurement of the oxygen content in the supplied Inert Gas.
All the measurements mentioned must be performed.
Measurement of the oxygen level in the middle of the ullage space in the tank to be washed

For gauging tanks (from ullage ports) that are being loaded with static accumulator cargoes, you may, at any time during the loading use:

Ropes made of man-made synthetic polymers with non-metallic, non-conductive equipment at the end?
Steel ullage tapes?
Ropes made of natural fibres, such as manila or cotton with non-metallic, non-conductive equipment at the lower end?
Ropes made of man-made synthetic polymers with a steel bob at the end?

You are serving on a 5 year old chemical tanker. You are called upon to order a portable blower for ventilation of DB tanks, cofferdams & pipe tunnels prior entry & during inspection.You would order a blower of capacity:

Able to effect a complete change of air of the space being ventilated 16 times an hour?
Able to effect a complete change of air of the space being ventilated 12 times an hour?
Able to effect a complete change of air of the space being ventilated once an hour?
Able to effect a complete change of air of the space being ventilated 4 times an hour?

When stowing cargo samples, they should be kept in a place which, in addition to being cell-divided to prevent bottles from shifting at sea is:

Made of material resistant to the different liquids to be stowed and also well ventilated?
Designed so that samples can be jettisoned rapidly if necessary?
Fully air-conditioned?
Completely sealed from air?

Pure Nitrogen is sometimes used to blanket sensitive cargoes because:

It affords some protection against spontaneous reaction
It affords protection against humidity
All the mentioned alternatives
It affords protection against oxidation

Several cargoes require determination of pH values (acidity) which is often a measure of quality or degradation of cargo such as animal or vegetable oil during transport. A neutral solution has a pH value of:

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