Construction Trade Exam Research Area

Washington DC
Third Class Stationary Boilers
ICC Exam # 323

Licensing Agency

Washington DC
Department of Consumer and Regulatory Affairs

1100 4th St SW
Washington, DC  20024
Phone:  (202) 442-4400
DC Licensing 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 Operations, Maintenance, and Safety 10
Water Treatment 10
Boiler Combustion, Fuels, and Pollution Control 10
Boiler Accessories and Auxiliary Equipment 10
Engineering Calculations 10
Electrical 10
Controls - Pneumatic and Electronic 10
Pumps, Feed, Hydronic, and Condensate Systems 10
Refrigeration, Air Conditioning, and Cooling Towers 10
Boiler Design and Principles 10

Total Number of Test Questions: 70
Time Allowed (hours): 2.5

Reference Books and Codes

1. Boiler Operator's Workbook, 4th Edition, 2008, R. Dean Williams. Buy at Amazon
2. Stationary Engineering, 4th Edition, 2008, Harold J. Frost, Daryl R. Frederick, M. Steingress. Buy at Amazon
3. High Pressure Boilers, 4th Edition, 2009, Frederick Steingress, Harold Frost. Buy at Amazon
4. Steam Plant Operation, 8th Edition, Everett B. Woodruff, Herbert B. Lammers, Thomas F. Lammers. Buy at Amazon
5. Boiler Operator's Guide, 4th Edition, 1997, Anthony L Kohan. Buy at Amazon
6. Refrigeration and Air Conditioning Technology, 6th Edition, 2008, W. C. Whitman and W. M. Johnson, Delmar ITP. Buy at Amazon
7. Low Pressure Boilers, 2nd Edition, 2004, Frederick M. Steingress, ATP. Buy at Amazon
8. Ugly's Electrical References, 2014, George V. Hart. Buy from Amazon
9. Electric Motor Control for Integrated Systems, 4th Edition, 2009, Gary J. Rockis, Glen A. Mazur. Buy at Amazon
10. HVAC Control Systems, 3nd Edition, 2012, Ronnie J. Auvil. Buy at Amazon
NOTE: With the exception of Ugly's Electrical References,
any edition of the above books are acceptable.

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Washington DC • Third Class Stationary Boilers
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