District of Columbia Contractors License Exams

District of Columbia Journeyman Plumber

Sample Questions for the District of Columbia Journeyman Plumbers Exam

  1. For field-constructed flashings, sheet lead used for flashing of vent terminals shall not be less than _____ pounds per square foot.
    1. 2
    2. 3
    3. 4
    4. 5
  2. The minimum water seal for industrial sand interceptors (clarifiers) is ___ inches:
    1. 2
    2. 4
    3. 6
    4. 12
  3. Which of the following implements should be used to prevent kinks when reshaping soft copper tubes:
    1. A dummy
    2. A brass ferrule
    3. A bending spring
    4. An internal switch
  4. How many gallons should a septic tank for a four-bedroom house hold?
    1. 550
    2. 750
    3. 1000
    4. 1200
  5. What fitting and procedure should be used to connect a discharge pipe from a sewage ejector to a horizontal gravity draining line?
    1. From top through a tapped san tee fitting
    2. From the side through a P-trap fitting
    3. From the top through a wye branch fitting
    4. From the bottom through a 1/8 bend fitting
Answers: Click Here to show the answers.