Construction Trade Exam Research Area

Washington DC
(335) Sixth Class Stationary Boilers

Licensing Agency

Washington DC
Department of Consumer and Regulatory Affairs
Board of Industrial Trades

1100 4th St SW
Washington, DC  20024
Phone:  (202) 442-4400
Trade Board link

Exam Administrator

International Code Council
900 Montclair Rd.
Birmingham, AL 35213
(888) 422-7233, ext. 5524
Candidate Information Web Page

Exam Type


Exam Content

Subject Areas % of
Boiler Operation and Safety 10
Fuel and Draft System 10
Steam Systems 10
Boiler Water Treatment 10
Engineering Calculations 10
Boiler Fittings / Accessories 10
Hydronic Systems 10
Feedwater Systems 10
Controls 10
Boiler Design and Principles 10

Total number of test questions: 70
Time allowed (hours): 2.5

Reference Books

1. Low Pressure Boilers, 4th Edition, Frederick M. Steingress Buy at Amazon
NOTE:  Any edition of the above book is acceptable

Recommended Study Materials

Washington DC • Sixth Class Stationary Boilers

Available Products

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