Odor Control Technician study guide
Odor Control Technician · Work through your exam, one topic at a time.
The Odor Control Technician (OCT) certification is offered by IICRC and is aimed at cleaning and restoration professionals who deal with odor problems as part of their work. The published description states that the credential covers olfaction and odor, odor sources, the detection process, the theory of odor control, equipment, chemical options, and applications. The Odor Control Technician study guide has 7 sections and about 1,864 words.
01Olfaction and odor
This domain tests how humans perceive odorous volatile compounds and how those perceptions are quantified. You must distinguish sensory measurements from instrumental concentration readings, because the exam often asks why a low-concentration mixture can smell stronger than a high-concentration single compound.
273 words, about 1 min02Odor sources
This domain tests source identification: which compounds form under which biological and chemical conditions, and where they are released in a facility. The exam expects you to link an odor complaint to a process condition, not just name a chemical.
301 words, about 2 min03Detection process
This domain tests how odor is sampled, measured, and interpreted. You must choose a method that fits the question: real-time safety, regulatory compliance, source diagnosis, or community complaint investigation.
267 words, about 1 min04Theory of odor control
This domain tests the mechanisms that remove, destroy, or change odorous compounds. The exam distinguishes true control, meaning mass removal or destruction, from temporary masking or dilution.
286 words, about 1 min05Equipment
This domain tests selection and operation of capture and treatment equipment. You must match equipment to odorant, flow, concentration, and site constraints.
249 words, about 1 min06Chemical options
This domain tests chemical selection for sulfide control, pH adjustment, oxidation, and odor neutralization. The exam asks for the right chemistry and the safety consequences of the wrong mix.
232 words, about 1 min07Applications
This domain tests how odor control is applied at real facilities: wastewater, lift stations, landfills, composting, food processing, and industrial operations. The exam expects an integrated control train, not a single product.
256 words, about 1 min