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Volatile Organic Compound

CBT 55 questions

First 5 of 55 questions — with answers

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  1. Question 1

    An unsaturated vapour may be defined as not being in contact with its liquid phase. Which of the given options is the main source of unsaturated vapour in a cargo tank of a crude oil tanker?
    • Air and Inert Gas.
    • Sediments.
    • H2S.
    • Tank anodes.

  2. Question 2

    As a crude oil tanker cargo tank fills with liquid cargo what will occur in the ullage space of the cargo tank:
    • Saturated and unsaturated vapour mix together and become the Total Vapour Pressure.
    • Saturated vapour from the cargo pushes the inert gas out through the vent system.
    • The space above the liquid becomes saturated.
    • The vapour above the liquid becomes neutral when mixed with the inert gas.

  3. Question 3

    As part of the VOC control measures certain operational records must be maintained. Select, from the given options, all of those that should be recorded when any VOC is released from a crude oil tanker:
    • Target operating pressure for the voyage.
    • Time and pressure within the system before releasing the VOC.
    • Time and pressure within the system after the releasing the VOC.
    • Person in charge of the VOC release.
    • Location of vessel at the time of release.

  4. Question 4

    As a part of recommended VOC emission control measures, which of the given options is the condition when COW operations are allowed to be carried out at sea?
    • Between multiple discharge ports.
    • Only on ballast voyages.
    • Only if heavy weather ballast is required for the safety of the ship.
    • Only for sludge control.

  5. Question 5

    Best practice for VOC control, as detailed in this module, recommends that the ship should define a cargo tank target operating pressure which should be as high as safety possible. What should the target pressure be relative to the P/V valve setting pressure?
    • About 70 % of P/V valve setting pressure of 1 400 mmWG.
    • About 70 % of P/V valve setting pressure of 1 500 mmWG.
    • About 80 % of P/V valve setting pressure of 1 500 mmWG.
    • About 80 % of P/V valve setting pressure of 1 200 mmWG.

Preview — 5 of 55 questions

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About this CBT test

Volatile Organic Compound is a CBT test with 55 questions and verified answers. Common topics include: cargo tank, emission control, board crude, management plan, volatile organic, liquid phase, voc, oil.

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