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Fresh Water System Sanitation

CBT 30 questions

First 5 of 30 questions — with answers

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

  1. Question 1

    After maintenance and inspection of a potable water tank, how can the tank be sanitised quickly without filling it with water? Select the ONE correct answer.
    • The surfaces should be coated in a solution containing chlorine at 20 ppm.
    • The surfaces should be coated in a solution containing chlorine at 50 ppm.
    • The surfaces should be coated in a solution containing chlorine at 200 ppm.
    • The surfaces should be coated in a solution containing chlorine at 500 ppm.

  2. Question 2

    How can a seafarer catch Legionnaires’ disease on a vessel? Select the ONE correct answer.
    • By drinking contaminated water.
    • By breathing infected aerosols.
    • By getting contaminated water on the skin.
    • By human contact.

  3. Question 3

    How could a person become sick after drinking a vessel’s potable water supply? Select the TWO best answers.
    • The vessel’s disinfection plant is not operating correctly.
    • Their immune system was too low.
    • The water has not been chemically treated correctly.
    • They have drunk too much of it.

  4. Question 4

    How is a virus different to a bacterium? Select the ONE best answer.
    • A virus is not a living organism.
    • A virus causes a worse illness than bacteria.
    • A virus is larger than bacteria.
    • A virus is made up of a string of bacteria.

  5. Question 5

    How often should the water in a regularly used leisure pool, as found on a passenger vessel, be tested for contaminants and chlorine levels? Select the ONE correct answer.
    • Often, particularly when there are children using it.
    • Once a day.
    • It should be continuously tested.
    • Once every hour.

Preview — 5 of 30 questions

You are seeing the first 5 questions with answers. Unlock the remaining 25 to study the whole test — online or offline.

About this CBT test

Fresh Water System Sanitation is a CBT test with 30 questions and verified answers. Common topics include: potable water, leisure pool, tank, maintenance, regularly, system, keep, bacteria.

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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