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Washington DC
License Exam Preparation
Electrical
220
Master Electrician
307
Journeyman Electrician
309
Low Voltage Electrician
338
Journeyman Sign Electrician
824
Residential Maintenance Electrician
Plumbing
300
Master Gas Pipe Fitter
301
Journeyman Gas Pipe Fitter
302
Journeyman Plumber
303
Master Plumber
304
Master Plumber with Gas
310
Journeyman Plumber with Gas
Refrigeration
311
Master A/C & Refrigeration Mechanical Unlimited
312
Journeyman A/C & Refrigeration
322
Master Refrigeration & A/C Mechanic Limited
Operating Engineers
313
First Class Stationary Boilers
314
Second Class Stationary Boilers
323
Third Class Stationary Boilers
335
Sixth Class Stationary Boilers
