Michigan Contractors License Exams

Michigan Plumbing Contractor

Sample Questions for the Michigan Plumbing Contractors 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 is the most common plumbing maintenance problem?
    1. Horizontal drainage lines
    2. Ground joint connections
    3. Clogged drains
    4. Direction of flow
  5. Whose responsibility is it to preset the water heater thermostat?
    1. The landlord
    2. A professional engineer
    3. The installing plumber
    4. The manufacturer
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