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National Contractors License Bureau
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State Example Questions

C-42 Sanitation System

NOTE: All questions are written and reviewed by licensed contractors who are actively working in the field.

The following questions are typical of the kind of items that are on the examination.

The correct answer is highlighted.


  1. What is the minimum distance a septic tank can be located from a structure?

    • a. 5'
    • b. 8'
    • c. 10'
    • d. 12'

  2. In a gravity flow leach field system using perforated distribution piping, where are perforations located?

    • a. At the top of the pipe
    • b. At the sides of the pipe
    • c. At the bottom of the pipe
    • d. All around the pipe

  3. If a flat rectangular roof measures 15' x 27', how many squares of roof covering is required?

    • a. 4.5
    • b. 40.5
    • c. 405.0
    • d. 4005.0