IAPMO UMC MPE study guide
IAPMO UMC MPE · Work through your exam, one topic at a time.
The IAPMO Uniform Mechanical Code Mechanical Professional Examination (UMC MPE) is a code-competency credential for mechanical trade professionals who design, install, inspect, or administer HVAC and refrigeration work governed by the Uniform Mechanical Code. It is typically pursued by mechanical contractors, journeyman and master mechanics, plan reviewers, combination inspectors, and code officials who need to demonstrate working command of the UMC rather than general trade skill. The IAPMO UMC MPE study guide has 10 sections and about 3,112 words.
01Administration, Scope, and General Requirements
This domain tests how the UMC is applied before equipment is selected: scope, permits, approved plans, inspections, material approval, access, and general installation rules. Expect scenario questions about whether a mechanical installation is regulated and whether the administrative path is complete.
306 words, about 2 min02Duct Systems and Air Distribution
This domain tests duct construction and air distribution: materials, thickness and reinforcement, seams and joints, supports, dampers, access, clearances, plenum use, insulation, and testing. Questions often ask whether a duct assembly is acceptable for its location and pressure class.
341 words, about 2 min03Combustion Air, Venting, and Chimneys
This domain tests the air supply and flue-gas removal for fuel-burning appliances: confined versus unconfined spaces, indoor and outdoor combustion air, openings and louvers, vent categories, connectors, chimney liners, termination, and common venting. Combustion air must be sufficient for all appliances in the space, based on total input rating, not one appliance alone.
337 words, about 2 min04Appliances, Equipment, and Installation Clearances
This domain tests appliance and equipment installation: listing, manufacturer instructions, combustible clearances, service access, floors, attics and roofs, condensate disposal, safety devices, and protection from damage. Appliances must be listed for the application and installed per the listing and manufacturer instructions.
301 words, about 2 min05Refrigeration Systems and Refrigerant Piping
This domain tests refrigeration systems and refrigerant piping: refrigerant classification, materials, brazing, pressure testing, evacuation, leak detection, relief devices, ventilation, machinery rooms, supports, and protection. Refrigerants are classified by safety group, including toxicity and flammability.
304 words, about 2 min06Hydronic Heating and Cooling Piping
This domain tests hydronic piping and components: expansion control, relief valves, air elimination, backflow protection, pipe materials, supports, freeze protection, boiler trim, controls, and radiant systems. Closed hydronic systems need expansion tanks sized for system volume and temperature change.
310 words, about 2 min07Ventilation, Exhaust, and Indoor Air Quality
This domain tests ventilation and exhaust design: outdoor air, local exhaust, kitchen hoods and grease ducts, bathroom and dryer exhaust, makeup air, termination, balancing, and indoor air quality controls. Ventilation must provide outdoor air for occupants and makeup air for exhaust systems.
292 words, about 1 min08Fuel-Gas Piping and Appliance Connections
This domain tests fuel-gas piping and appliance connections: pipe sizing, materials, CSST bonding, sediment traps, shutoff valves, connectors, leak testing, clearances, and connection to appliances. Gas piping is sized using total connected load, longest length, allowable pressure drop, and pipe material.
321 words, about 2 min09Solar, Solid-Fuel, and Specialty Heating Systems
This domain tests solar thermal, solid-fuel, and specialty heating installations: collector mounting, freeze protection, relief and expansion, chimney and flue requirements, floor protection, clearances, and specialty equipment limitations. Solar thermal collectors must be structurally supported and mounted per listing.
296 words, about 1 min10Inspection, Testing, and Plan Review
This domain tests the inspection and plan-review process: completeness of documents, sequence of rough-in and final inspections, required tests, witness procedures, correction notices, and verification of clearances and access. Plan review checks scope, occupancy, equipment schedules, capacities, combustion air, venting, duct design, piping, clearances, structural support, access, and firestopping.
304 words, about 2 min