CAOHC Exam Questions with 100% Correct Answers | Verified | Updated 2024, Exams of Advanced Education

Download CAOHC Exam Questions with 100% Correct Answers | Verified | Updated 2024 and more Exams Advanced Education in PDF only on Docsity! CAOHC Exam Questions with 100% Correct Answers | Verified | Updated 2024 What does CAOHC stand for? - Correct Answer-Council for the Accreditation in Occupational Hearing Conservation Main role of CAOHC - Correct Answer-To certify and train Occupational Hearing Conservationists (OHC) OHCS must be recertified within ________ years of initial certification. - Correct Answer-Five Tinnitus - Correct Answer-Technical term for ringing or other noises in the ears. Interference with communication, degraded job performance, stress and annoyance/fatigue - Correct Answer-Problems caused by noise in addition to hearing loss pg. 1 professoraxe l When is the best time to perform a baseline audiogram? - Correct Answer-14 hours away from noise exposure, preferably before starting work. When is the best time to perform an annual audiogram? - Correct Answer-Well into the work shift, near the end of the day. In what part of the auditory system does a sensorinerual hearing loss occur in? - Correct Answer-The inner ear or cochlea or the nerve of hearing Besides noise, one of the most frequent contributors to sensorineural hearing loss is: - Correct Answer-Presbycusis or the hearing loss from aging The aspect of sound that is perceived as loudness is called _______ and is quantified in terms of _______. - Correct Answer-Intensity; Decibels A sound's frequency is perceived by the ear as _____ and quantified in terms of _____. - Correct Answer-Pitch; Hertz pg. 2 professoraxe l When OSHA considers the combination of an earmuff with an earplug, what is the increase in attenuation assumed to be over the protector with the higher attenuation? - Correct Answer-5 DB What is the name of the effect when a person's own voice sounds amplified/hollow when wearing a hearing protector? - Correct Answer-Occlusion effect In what condition is Occlusion effect most pronounced? - Correct Answer-When earplugs are not deeply inserted into ear canals. Besides noise-exposed workers, what other groups need to receive training on the hearing conservation program? - Correct Answer-Managers and supervisors What are the three required topics of a hearing conservation program? - Correct Answer-Effects of noise on hearing. Purpose and procedure of the annual hearing test or audiometric evaluation and the purpose of hearing protectors. The advantages, disadvantages, and attenuation of various types, and instructions on selection, fitting, use and care. pg. 5 professoraxe l What is the desirable length of a worker training program? - Correct Answer-15-25 minutes What is best for hearing conservation training, lecture or seminar? - Correct Answer-Seminar During the training session, what is the best time to introduce the most important material? - Correct Answer-Early in the presentation What is the minimum info that OSHA and MSHA require the professional reviewer to be provided with? - Correct Answer- Copy of noise regulation, employee's baseline, most recent audiogram, background levels of test room and audiometer calibrations. As an OHC, you are only responsible for ________________ hearing tests. - Correct Answer-Pure-tone, air conduction What type of hearing protectors are not suitable for dirty hands? - Correct Answer-Essentially anything that requires pg. 6 professoraxe l you to touch the earplug is not ideal for dirty hands such as sponge or foam roll down earplugs. What frequencies are affected by cerumen impacted or waxy ear canals? - Correct Answer-All frequencies, but ESPECIALLY between 500-1000 HZ How many hours should an employee who has a STS be noise free before giving them a retest? - Correct Answer-14 hours (much like the baseline) In the general population, what is the most frequently reported type of loss? - Correct Answer-Presbycusis Number that is added when two identical sources are operating at the same time. - Correct Answer-3dB Example: 90dB + 90dB doesn't equal 180 dB in loudness, rather 93 dB in loudness. If you are unable to communicate at this distance, then it is likely that you are in a hearing hazardous environment. - Correct Answer-3 feet pg. 7 professoraxe l The number of days an employer has to inform an employee that they have experienced a shift in hearing from when the employer was performed. - Correct Answer-21 days Normal hearing levels - Correct Answer-0-25 dB The number of calendar days an employee may be retested without having to record it on the OSHA log if it was deemed as being a possible recordable. The ___ days begins at the annual test. - Correct Answer-30 days The human ear audibility range - Correct Answer-20-20,000 HZ Speech frequency range - Correct Answer-500-4000 HZ Required audiometric test frequencies. - Correct Answer-500 HZ, 1000 HZ, 2000 HZ, 3000 HZ, 4000 HZ, and 6000 HZ are required. 8000 HZ is highly recommended but is not required. ___ hz - ___ hz required booth background levels to be checked - Correct Answer-500 hz - 8000 hz pg. 10 professoraxe l Begin hearing testing at ____ hz at __ dBA in loudness. Decrease by __ dB steps when a person hears it and increase by 5 dB when a person does not hear it. - Correct Answer-1000 hz; 40 dBA; 10 dB, 5 dB ____ - ____ hz are the frequencies affected by noise, and the classic noise notch or hearing loss due to noise that damages the cochlea is found at ____ hz. - Correct Answer-3000-6000 hz; 4000 hz OSHA - Correct Answer-Occupational Safety and Health Adminstration MSHA - Correct Answer-Mine Safety and Health Administration DoD - Correct Answer-Dept of Defense CAOHC - Correct Answer-Council for the Accreditation in Occupational Hearing Conservation OHC - Correct Answer-Occupational Hearing Conservationist pg. 11 professoraxe l HCP - Correct Answer-Hearing Conservation Program SLM - Correct Answer-Sound level meter tells us how loud it is at the moment or a point in time noise measurement ANSI - Correct Answer-American National Standards Institute Dosimeter - Correct Answer-Tells us on average how loud it is for an employee. Good for highly variable, intermittent, and impulse noise. Dose - Correct Answer-Noise exposure as a percent of the PEL TWA - Correct Answer-Time Weighted Average default 8- hours PEL - Correct Answer-Permissible Exposure Limit (OSHA 90d BA 8 hour TWA) Action Level - Correct Answer-Level at which OSHA requirements are triggered (OSHA 85 dBA 8 hour TWA) pg. 12 professoraxe l