Oregon Boiler Class 3 Service Mechanic (CL3) Contractor License

The Boiler Class 3 Service Mechanic (CL3) Contractor License allows you to do the following work:

  • Installing, and/or repairing:
    • Boilers, which including both boiler and non-boiler external piping
    • Unfired pressure vessels by any non-welded method of attachment

How to Get the Boiler Class 3 Service Mechanic (CL3) Contractor’s License in Oregon?

  1. Fill out the application form:
  2. Complete a work history document and fill out the experience verification form:
  3. Sign an applicant’s affidavit and choose the preferred examination location
  4. Mail or fax a sealed packet of all the previous documents to:
    Oregon Building Codes Division
    P.O. Box 14470
    Salem, OR 97309-0404
    Fax: 503-378-2322
  5. Schedule, pay, and take the examination administered by the Building Codes Division. For more information on the test, refer to the study guide:
  6. Expect the license issued by the Building Codes Division via mail

Oregon Boiler Class 3 Service Mechanic (CL3) Contractor License Exam Prep Course

  • Login credentials emailed upon enrollment

    Unlimited access (no time limits)

    Lecture videos

    Practice questions

    Key concepts

    Step-by-step solutions to math problems

    $525.00
    $525.00

Oregon Boiler Class 3 Service Mechanic (CL3) Contractor License Exam

Below is all the information related to the trade exam, including the official reference list.

Oregon Boiler Class 3 Service Mechanic (CL3) Contractor Trade Exam

  • Testing Company: Oregon Building Codes Division©
  • Number of Questions: 52
  • Time Allowed: 180 Minutes
  • Minimum Passing Score: 39 Questions (75%)
  • Subjects Involved:
    • Power piping
    • Building Service piping
    • Oregon Administrative Rules
    • Boiler and Pressure Vessel Laws
    • State of Oregon Boiler Safety Program
    • Structural and mechanical blueprints with the ability to interpret specifications
    • Building service systems (hydronics) for boilers and related appurtenances
  • Building Codes Division© Boiler Class 3 Service Mechanic (CL3) Official Content Outline

Oregon Boiler Class 3 Service Mechanic (CL3) Contractor Book Set

This set of books includes all required references for the Boiler Class 3 Service Mechanic (CL3) exam. Orders placed before 2 PM are shipped the same day via UPS and a tracking number is emailed before 3 PM.

  • OREGON BOILER CLASS 3 SERVICE MECHANIC (CL3) - BOOK SET WITHOUT TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $3,704.68
  • OREGON BOILER CLASS 3 SERVICE MECHANIC (CL3) - BOOK SET WITH TABS INCLUDES ALL BOOKS FOR TRADE AND BUSINESS EXAMS

    Sales price: $3,794.68

Oregon Boiler Class 3 Service Mechanic (CL3) Contractor Exam Books

Books Allowed in Testing