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Gas Measurement

CBT 64 questions

First 5 of 64 questions — with answers

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  1. Question 1

    A sampling pump for an oxygen analyser with a capacity of 100 ml per stroke, connected to a 10 metre sampling line with a capacity of 25 ml per metre is being used to obtain a sample of a cargo tanks atmosphere. How many strokes of the pump are required to ensure, that a truly representative sample is obtained in practice?
    • 4.
    • 2.
    • 10.
    • 25.

  2. Question 2

    With respect to gas detection instruments what is the purpose of carrying out a "bump test"?
    • To check of the instrument reading against a known concentration of gas.
    • To check the effect of a heavy impact on the instrument reading.
    • To establish the zero setting of the instrument before use.
    • To recalibrate the instrument for a fixed reading of gas concentration.

  3. Question 3

    According to the ISGOTT definition, what is a toxic gas?
    • A gas, which is harmful to human life.
    • A gas, which is flammable.
    • A gas other than oxygen.
    • A gas mixture containing hydrocarbon gas.

  4. Question 4

    For a correctly inerted cargo tank, what would be the expected oxygen content reading, obtained during checks with a portable oxygen analyser?
    • 8 % or less by volume.
    • 11 % or less by volume.
    • Less than 21 % by volume.
    • Less than 20 % by volume.

  5. Question 5

    From the options given select the one, that is generally accepted as the minimum oxygen content to support combustion:
    • 11 %.
    • 16 %.
    • 8 %.
    • 21 %.

Preview — 5 of 64 questions

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About this CBT test

Gas Measurement is a CBT test with 64 questions and verified answers. Common topics include: cargo tank, oxygen content, threshold limit, toxic gases, short term, catalytic filament, combustible hydrocarbon, gas.

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