National Plumbing Code Of The Philippines

92 Questions | Total Attempts: 64

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Plumbing Code Quizzes & Trivia

NATIONAL PLUMBING CODE


Questions and Answers
  • 1. 
    “Size of water piping shall be based on the total _________
    • A. 

      Water consumption

    • B. 

      Water demand

    • C. 

      Water potability

    • D. 

      None of the above

  • 2. 
     Water closet bowls for________ use shall be elongated bowl types equipped with open-front seats.  
    • A. 

      Public

    • B. 

      Private

    • C. 

      Government

    • D. 

      None of the above

  • 3. 
     Wastewater drain for _________ cupsink at church altar & baptisteries font outlet shall discharge direct to the ground & not connected to any sanitary or drainage system.   
    • A. 

      Holy sink

    • B. 

      Lavatory

    • C. 

      Baptismal shrine

    • D. 

      Sacrarium

  • 4. 
     Tunnels shall have: the following  except
    • A. 

      A clear height of 0.6m above the pipe & shall be limited in length to 1/2 the depth of the trench.

    • B. 

      Driven pipes shall have at least one pipe size larger than the pipe to be laid

    • C. 

      Shall be back-filled in thin layers of 0.3m above the top of the pipe with clean earth which shall not contain stones, boulders, cinders or other materials which can damage or break the pipes or cause corrosive action.

    • D. 

      None of the above

  • 5. 
     the minimum cross sectional area at the seat of the control valve or the supply pipe or tubing which feeds the device outlet. If two or more lines supply one outlet, the effective opening shall be the sum of the cross-sectional areas of the individual supply lines or the area or the single outlet, whichever is smaller.
    • A. 

      Effective opening

    • B. 

      Effective depth

    • C. 

      Effective area

    • D. 

      Effective invert

  • 6. 
     Suspended cast iron soil pipe shall be supported at not more than ____m intervals, except that pipe exceeding 1.5m length may be supported at not more than _____m intervals. Supports shall be adequate to maintain alignment & to prevent sagging & shall be placed within 0.45m of the hub or joint.   
    • A. 

      1.5/ 3

    • B. 

      1.5/ 4

    • C. 

      3/ 1.5

    • D. 

      4/ 1.5

  • 7. 
     No water closet or bidet shall be set closer than ______m from its center to any side of the wall or obstruction or closer than ______m center to center to any similar fixture. 
    • A. 

      .375 / 0.75

    • B. 

      .375 / 0. 70

    • C. 

      .40 / 0.70

    • D. 

      .50 / 0.60

  • 8. 
     Lead Pipe         - shall be supported at by____________for entire length with hangers properly spaced.
    • A. 

      Stiff aluminum or wooden backing

    • B. 

      Stiff metal or wooden backing

    • C. 

      Stiff plastic or metal sheet

  • 9. 
     Fixtures having concealed slip joint connections shall be provided with an access panel or utility at least ______m in its least dimension for inspection & repair.
    • A. 

      0.30

    • B. 

      0.20

    • C. 

      0.10

    • D. 

      0.40

  • 10. 
     Excessive water pressure – water pressure greater than ____ Kpa
    • A. 

      551

    • B. 

      552

    • C. 

      553

    • D. 

      554

  • 11. 
     drains shall have a waterway equivalent area of the “tailpiece” – meaning, the sum of all the areas of the perforation of the strainer is equivalent to the outlet area.  
    • A. 

      Strainers serving bathub

    • B. 

      Strainers serving shower

    • C. 

      Strainers serving lavatory

    • D. 

      None of the above

  • 12. 
     Copper Tubing - shall be supported at approximately ________m intervals for piping 38mm diameter & smaller & _______m intervals for piping 51mm & larger in dia.
    • A. 

      1.8/ 3.0

    • B. 

      1.9/ 3.5

    • C. 

      1.5 / 2.5

    • D. 

      None of the above

  • 13. 
     Continuous waste fixture tailpiece connections were exposed or accessible may be of seamless drawn brass not less than Ga. 20 B&S or ______mm thk.   
    • A. 

      0.90

    • B. 

      0.80

    • C. 

      0.70

    • D. 

      0.60

  • 14. 
     All porcelain enamel surfaces on plumbing fixtures shall be __________
    • A. 

      Mold resistant

    • B. 

      Acid resistant

    • C. 

      Corrosion resistant

    • D. 

      None of the above

  • 15. 
     All pipe determinations shall be based on eighty percent (___) the reduced pressure.
    • A. 

      70%

    • B. 

      60%

    • C. 

      80%

    • D. 

      90%

  • 16. 
    ______________ must be supported at least every other joint except that when the developed length between supports exceeds 1.2m, they shall be provided at each joint. 
    • A. 

      Couplings and compression joints

    • B. 

      Hubless or compression gasket joints

    • C. 

      Caps and plugs

    • D. 

      None of the above

  • 17. 
    ____________     - shall be supported by stiff metal or wood backing with hangers in its entire length for small-size tubings up to 38mm diameter & without backings but with spaced metal hangers at approved spacing for larger-size tubings.     
    • A. 

      Steel tube

    • B. 

      Plastic tube

    • C. 

      Aluminum tube

    • D. 

      Concrete tube

  • 18. 
    ________ m max
    • A. 

      61

    • B. 

      62

    • C. 

      63

    • D. 

      64

  • 19. 
     If water closets or other plumbing fixtures are installed in the buildings where there is no sewer within a reasonable distance, suitable provision shall be made for disposing of the building sewage by some accepted method of sewage treatment and disposal, such as ______________
    • A. 

      WASTE TANK

    • B. 

      SEPTIC TANK

    • C. 

      SEWAGE DISPOSAL SYSTEM

    • D. 

      NONE OF THE ABOVE

  • 20. 
      Drainage pipes shall be run in practical alignments & at a uniform slope between manholes of not less than ______________ toward the point of disposal.
    • A. 

      20mm/m or 2%

    • B. 

      30mm/m or 3%

    • C. 

      40mm/m or 4 %

    • D. 

      10mm/m or 1 %

  • 21. 
    Changes in direction of piping shall be made by the use of approved pipe fittings & shall be the angles presented by the following except
    • A. 

      22 ½ degrees bend

    • B. 

      45 degrees bend

    • C. 

      60 degrees bend or other approved fittings of longer sweeps

    • D. 

      30 degress bend

  • 22. 
    All piping of plumbing systems shall be of durable ____________-APPROVED materials, free from defective workmanship, designed and constructed by Registered Master Plumbersto ensure satisfactory service.
    • A. 

      NAMPAP

    • B. 

      DILG

    • C. 

      DPWH

    • D. 

      DENR

  • 23. 
    a physical separation, which may be a low inlet into the indirect waste receptor from the fixture, appliance or device indirectly connected
    • A. 

      AIR SEPARATION

    • B. 

      AIR BREAK

    • C. 

      AIR DEVISOR

    • D. 

      NONE OF THE ABOVE

  • 24. 
    a length of soil or waste stack corresponding in the general to a storey height, but in no case less than 2.43m within which the horizontal branches from one floor or storey of a building are connected to the stack.
    • A. 

      BRANCH INTERVAL

    • B. 

      INTERVAL

    • C. 

      BRANCH

    • D. 

      LENGTH

  • 25. 
    Each family dwelling unit on premises abutting on a sewer or with a private sewer-disposal system shall have at least ___ water closet and ___ kitchen-type sink
    • A. 

      1,2

    • B. 

      1,1

    • C. 

      2,1

    • D. 

      2,3