OH HVAC Contractor study guide
OH HVAC Contractor · Work through your exam, one topic at a time.
The Ohio HVAC Contractor license is the state contractor credential issued by the Ohio Construction Industry Licensing Board (OCILB), which operates within the Department of Commerce's Division of Industrial Compliance. OCILB licenses qualified contractors in the electrical, HVAC, plumbing, hydronics, and refrigeration trades; individuals who meet the Board's qualifications and pass the required licensing examination are issued a state contractor license commonly called a Master License. The OH HVAC Contractor study guide has 4 sections and about 1,417 words.
01HVAC and Refrigeration Trade Competency
The HVAC and refrigeration portion of the Ohio contractor exam tests whether you can apply trade theory to field decisions: building heat gain/loss, equipment and duct selection, refrigerant-cycle diagnosis, combustion and venting, controls, and safe recovery/evacuation. Questions often give a field scenario and ask for the next diagnostic step or the calculation that supports a recommendation.
338 words, about 2 min02Plumbing and Hydronics Trade Competency
This domain checks whether an HVAC contractor can work safely around potable water, drainage, and hydronic heating/cooling systems. Expect questions on water-supply and DWV basics, cross-connection control, hydronic loop components, boiler/water-heater safety, pipe sizing, expansion, air removal, and commissioning.
337 words, about 2 min03Electrical Trade Competency
The electrical portion tests safe electrical work on HVAC/R equipment: Ohm's law and power, series/parallel circuits, motors and capacitors, contactors and relays, transformers and 24-volt control circuits, overcurrent protection, disconnects, grounding and bonding, conductor sizing, and the NEC requirements that apply to HVAC equipment. Ohm's law: E = I × R.
360 words, about 2 min04Ohio Revised Code Chapter 4740 and Board Administrative Requirements
This domain covers the statutory and administrative side of Ohio contractor licensing. It tests how ORC Chapter 4740 creates the Ohio Construction Industry Licensing Board (OCILB), which trades are licensed, what a license authorizes, how applications and exams are handled, renewal and continuing education, complaint and disciplinary procedures, and the relationship between state licensure and local permits and inspections.
382 words, about 2 min