Book updated May 2026. The District of Columbia licenses electricians as they do plumbers and HVAC professionals through the Department of Consumer and Regulatory Affairs (DCRA) — Occupational and Professional Licensing Administration (OPLA). Specifically, these tradespeople are licensed through the DC Board of Industrial Trades, which was established “to protect the public health, safety, and welfare of the citizens of the District by ensuring that individuals engaged in these trades have the specialized skills and training required to perform such services for the public.”
We create these self-practice test questions module referencing the concepts and principles currently valid in the exam. Each question comes with an answer and a short explanation which aids you in seeking further study information. We want to make sure these questions are tough enough to really test your readiness and draw your focus to the weak areas. Think of these as challenges presented to you so to assess your comprehension of the subject matters. The goal is to reinforce learning, to validate successful transference of knowledge and to identify areas of weakness that require remediation.
