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Exhaust Gas Scrubbers, Safe Operations

CBT 15 questions

First 5 of 15 questions — with answers

The correct answer is marked. Unlock the rest to study the whole test, online or offline.

  1. Question 1

    For a ship not using an approved scrubber, what is the IMO maximum limit on the amount of sulphur in fuel outside an Emission Control Area, ECA?
    • 0,5 % by mass.
    • 0,5 % by volume.
    • 0,1 % by mass.
    • 3,5 % by volume.

  2. Question 2

    Why is sulphur present in marine fuel oils?
    • It is added to improve combustion efficiency.
    • It is added during the refining process.
    • It is added to reduce engine wear.
    • It is an impurity which comes from crude oil.

  3. Question 3

    Why can the performance of open loop scrubbers be affected by the location of the ship? Select the ONE best answer.
    • Because the local air and water temperatures can be very high.
    • Because the local air and water temperatures can be very low.
    • Because they rely on the wash water being alkaline, and this alkalinity varies depending on where the ship is operating.
    • Because the local water can already be very turbid, which makes it difficult to keep outlet turbidity low.

  4. Question 4

    When might the use of open loop scrubbers not be allowed?
    • When the ship is not en-route.
    • Inside any IMO Emission Control Area (ECA).
    • When alongside in any port.
    • When local regulations have forbidden their use.

  5. Question 5

    What should be done with the waste products from a closed loop scrubber?
    • They must be landed at a shore reception facility for safe disposal.
    • They can be back-flushed into the sea when more than 12 miles from land and outside an ECA.
    • They can be back-flushed into the sea once an ECA.
    • They can be burned in an incinerator.

Preview — 5 of 15 questions

You are seeing the first 5 questions with answers. Unlock the remaining 10 to study the whole test — online or offline.

About this CBT test

Exhaust Gas Scrubbers, Safe Operations is a CBT test with 15 questions and verified answers. Common topics include: loop scrubbers, scrubber, imo, chemicals, limit, sulphur, fuel, emission.

You can practise the free questions online — one at a time, with the correct answer — or unlock the whole test and download it to study offline, without internet.

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