WASHINGTON DC MASTER A/C & REFRIGERATION MECHANICAL UNLIMITED CONTRACTOR - ONLINE EXAM PREP COURSE

The Washington D.C. Master A/C & Refrigeration Mechanical Unlimited Contractor Online Exam Prep Course by 1 Exam Prep provides candidates with the required study materials and guidance to prepare for the D.C. Department of Licensing mechanical contractor examination. This course covers essential HVACR principles, including air conditioning design, refrigeration systems, ventilation, heating, gas piping, and mechanical code compliance, in alignment with DCRA standards. It emphasizes topics from the International Mechanical Code (IMC), the Uniform Mechanical Code (UMC), and related sections of the National Electrical Code (NEC). The prep aligns with trade knowledge required for Master-level mechanical certification and includes practice exams reflecting PSI testing standards. Designed for HVAC professionals seeking licensure in Washington D.C., this training supports mastery of mechanical systems design, load calculations, and refrigeration cycle theory under the mechanical unlimited contractor scope.

Get one step closer to becoming a Washington DC Master A/C & Refrigeration Mechanical Unlimited Contractor with a prep course designed by 1ExamPrep to help you conquer the required examination.

Use the online course structure to tailor your prep to your individual learning style. You’ll have a full year of access to the online course.

• Test-taking techniques
• Highlights and Tabs locations for all reference materials
• Practice questions in printable pdf format 
• 1 year of online access

Android and iOS Compatible - Complete the course on your phone, anytime or anywhere.