Test Your Understanding Regarding Jets Vacuum Piping System

13 Questions | Total Attempts: 32

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Test Your Understanding Regarding Jets Vacuum Piping System


Questions and Answers
  • 1. 
    What are the 3 main elements in a Jets vacuum toilet system?
    • A. 

      Vacuum toilets, sewage treatment plant+ vacuum piping system

    • B. 

      Vacuum generating unit + piping system for transport of sewage + toilets, urinals, grey water interface units

    • C. 

      Vacuum generating unit + vacuum piping system + STP

  • 2. 
    Is this true or false?The vacuum level in a toilet piping system should be 40-55% vacuum in idle position. 
    • A. 

      True

    • B. 

      False

  • 3. 
    Is this statement  true or false?In a vacuum toilet system difference in air prossure is used to transport seage from toilets to a vacuum generating unit. 
    • A. 

      True

    • B. 

      False

  • 4. 
    How much air is sucked into the vacuum piping for each time the toilet is flushed?
    • A. 

      10-20 litres

    • B. 

      30-40 litres

    • C. 

      60-80 litres

  • 5. 
    Between flushes sewage and water is collected in ?
    • A. 

      The transport pockets of the piping system

    • B. 

      The grey water interface units

    • C. 

      The sewage treatment plan (STP)

    • D. 

      A collecting tank

  • 6. 
    Each time a vacuum toilet is flushed; what happens to the vacuum level in the piping system?
    • A. 

      The vacuum level in the piping system will increase

    • B. 

      The vacuum level in the piping system will decrease and the vacuum generating unit will start to re-build the vacuum level

    • C. 

      The vacuum level will remain unchanged in a correctly installed piping system

  • 7. 
    How far in the piping system will the seage move for each time a toilet is flushed?
    • A. 

      Alle the way from the toilet to the STP or collecting tank

    • B. 

      20-30 meters

    • C. 

      5 to 15 meters

  • 8. 
    Where in a vacuum system should the vacuum generating unit (VacuumaratorTM pump) be located?
    • A. 

      At the highest point of the vacuum system

    • B. 

      At the lowest point

    • C. 

      At the same height as the toilets in the system

  • 9. 
    What is meant by the expression "Backflow"?
    • A. 

      Sewage is flowing from the toilet to the vacuum generating unit

    • B. 

      Sewage is flowing form the vacuum generating unit to the collecting tank

    • C. 

      Sewage from upper pipes flowing back to the rising pipe connected to the toilet

  • 10. 
    What other subjects should be considered when installing a vacuum piping system?
    • A. 

      The size of the ship and the risk of varying trim and list of the ship

    • B. 

      The speed of the ship

    • C. 

      The waters in which the ship is designed to travel

    • D. 

      The outside temperature

  • 11. 
    What should be considered when installing a vacuum piping system in a ship where the totale pipe volume is less than 160 litres?
    • A. 

      To make the dimension of the pipes as big as possible

    • B. 

      To install bigger VacuumaratorTM pumps

    • C. 

      To install a vacuum accumulating tank

  • 12. 
    What is a "rodding point"?
    • A. 

      A point in a vacuum piping system where access to the piping is gained for cleaning

    • B. 

      A point where the pipining system is at its highest point

    • C. 

      A point where the pipining system is at its lowest point

  • 13. 
    Why should transport pockets be installed in a vacuum piping system?
    • A. 

      To prevent backflow to the toilets

    • B. 

      To make cleaning of the piping system possible

    • C. 

      To re-form slugs and thus secure the speed of the transport of sewage in the piping

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