Oregon Contractors License Exams

Oregon Boiler Contractor

Sample Questions for the Oregon Boiler Contractors Exam

  1. Which of the following precautions should be taken when welding near combustible materials?
    1. have some sort of extinguishing device readily available
    2. stay clear of the sparks
    3. try to direct the sparks away from the combustible material
    4. use a heat shield
  2. What is the advantage of a gate valve over a globe valve?
    1. a globe valve is more expensive
    2. a gate valve provides straight through full flow
    3. a gate valve is easier to install and service
    4. a globe valve provides straight through full flow
  3. What is one of the functions of a McDonnell-Millier feeder valve on a boiler?
    1. to protect the boiler from firing at a low level condition
    2. to protect the boiler from firing at a high level condition
    3. to keep water at a very low level
    4. to keep water at a very high level
  4. When installing insulation in the interior of a duct, which of the following characteristics of insulation would be MOST effective in reducing sound transmission?
    1. density
    2. porosity
    3. elasticity
    4. ductility
  5. In a heating/cooling system, where should the filter be placed?
    1. Ahead of heating and cooling coils and other mechanical equipment
    2. Between the heating and cooling coils
    3. In the HVAC room next to the furnace
    4. On the side of the return air plenum
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