COHC

The exam is multiple choice. Every question in this practice set follows the same model: one stem, one best answer, and three distractors that are wrong for a specific, teachable reason. CAOHC controls the real exam's length, timing, delivery method, and scoring, so verify those details on CAOHC's COHC pages rather than relying on any third-party summary.

Most candidates find the material familiar but the questions applied rather than recall-based. You are asked what to do next, which value is out of tolerance, or whether a shift is recordable - not to recite definitions. Difficulty rises sharply for anyone who has memorized facts without practicing calculations, audiogram reading, or the order of operations in a testing room.

Retake and re-examination rules are set by CAOHC and are not published in the source material reviewed here, so treat any specific retake count, waiting period, or fee you hear secondhand as unverified. Check CAOHC's COHC FAQ and recertification pages, or contact CAOHC directly, before you assume a retake window exists.

Start with the program requirements and the physics of noise, because dose, exchange rate, and exposure calculations underpin later topics. Then move to anatomy and audiometric procedure, followed by calibration and biological checks. Finish with audiogram interpretation, standard threshold shifts, and hearing protection, since those sections assume you already understand testing conditions and equipment.

Three repeat offenders: mixing up time-weighted average and dose calculations; misreading a standard threshold shift by averaging the wrong frequencies or comparing against the wrong baseline; and confusing calibration tolerances with biological check tolerances. A fourth is rushing audiogram interpretation - candidates see a familiar shape and stop checking whether the test environment or equipment was valid.

Training and certification requirements are governed by CAOHC, and eligibility rules can change between revisions. Rather than relying on a remembered prerequisite, read CAOHC's COHC Certification and Training page and confirm with the course director you plan to train under. Many candidates take an approved course first, then use practice questions to consolidate.

Validity periods and renewal requirements are set by CAOHC and are not stated in the source material reviewed here, so this site does not publish a figure. CAOHC maintains dedicated pages for COHC recertification and extension, plus a renewal extensions page. Those are the authoritative places to confirm your expiration date and options.

CAOHC publishes a course-finding tool and a Course Director listing, which are the appropriate places to locate approved training and upcoming dates. Because scheduling, pricing, and registration are handled through the council and its course directors, confirm all logistics there. This site provides independent study material only and has no affiliation with CAOHC.

Expect some. Noise dose, time-weighted average, exchange rate conversions, and hearing protector attenuation all lend themselves to short calculations, and interpretation questions assume you understand how those numbers were produced. Practice with a clear method and check units before arithmetic - most errors are unit errors, not conceptual ones.

No. These questions are original study material written for independent preparation. They are not endorsed by, drawn from, or reviewed by CAOHC, and they are not a substitute for an approved training course. Use them to test your understanding, then verify any policy, eligibility, or scheduling question against CAOHC's own published pages.