Alaska Contractors License Exams

Alaska Unlimited Commercial Plumber

Sample Questions for the Alaska Unlimited Commercial Plumbers Exam

  1. What is the aim of municipal codes in relation to drainage systems?
    1. to show you how to size a building drain
    2. to protect the public health
    3. to explain what a waste stack is
    4. to give detailed instructions on calculating maximum fixture unit loads
  2. When a vent is required in indirect waste piping, how must it be installed?
    1. connect it to a vent which serves a sanitary system
    2. to extend separately to the outside air
    3. with a beehive strainer at least 4 inches high
    4. below floor level
  3. What are the two causes of fixture trap seal loss that vent systems protect against in normal fixture use?
    1. siphonage and back pressure
    2. sumps and receiving tanks
    3. suds-producing fixtures and appliances
    4. water closets and building drains
  4. What fitting and procedure should be used to connect a discharge pipe from a sewage ejector to a horizontal gravity drainage 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
  5. The minimum water seal for industrial sand interceptors (clarifiers) is ____ inches?
    1. 2
    2. 4
    3. 6
    4. 12
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