OR HVAC Contractor study guide
OR HVAC Contractor · Work through your exam, one topic at a time.
The Oregon HVAC Contractor credential is a state-issued authorization for a business to advertise, bid, and perform heating, ventilating, air conditioning, and refrigeration work in Oregon. It is aimed at owners and qualifying individuals of HVAC/R businesses rather than at technicians seeking a trade certificate, so it blends trade knowledge with business and code responsibility. The OR HVAC Contractor study guide has 7 sections and about 1,518 words.
01Oregon Contractor Business Practices and Law
Oregon HVAC/R contracting is regulated by the Construction Contractors Board (CCB) under ORS 701. A business must hold a CCB contractor license with the proper endorsement before offering or performing work.
262 words, about 1 min02Oregon Building Codes and Administrative Provisions
The Oregon Building Codes Division (BCD) publishes statewide specialty codes, including the Oregon Mechanical Specialty Code, Oregon Residential Specialty Code, Oregon Electrical Specialty Code, and Oregon Fuel Gas Code. Local jurisdictions issue permits and perform inspections, but amendments are limited and must be approved.
238 words, about 1 min03Heating, Ventilating, and HVAC Systems
HVAC design starts with an ACCA Manual J load calculation, then Manual S equipment selection, then Manual D duct design. Use actual envelope, orientation, windows, and infiltration-not square-footage rules of thumb.
215 words, about 1 min04Refrigeration Systems and Components
The vapor-compression cycle has four basic components: compressor, condenser, metering device, and evaporator. The metering device controls superheat; the condenser controls subcooling.
204 words, about 1 min05Electrical and Controls for HVAC/R Equipment
NEC Article 440 governs HVAC and refrigeration equipment. Use the nameplate: minimum circuit ampacity (MCA) sets conductor size; maximum overcurrent protective device (MOCP) sets the breaker or fuse.
210 words, about 1 min06Fuel Gas Piping and Combustion Appliances
The Oregon Fuel Gas Code, based on the IFGC, covers gas piping, appliances, venting, and combustion air. Size pipe using the code tables for the available pressure and total connected load.
211 words, about 1 min07Safety, Tools, and Jobsite Practices
Follow OSHA and Oregon OSHA rules. Use lockout/tagout before servicing equipment, verify zero energy, and wear PPE for refrigerant, brazing, and electrical work.
178 words, under 1 min