CAOHC Bold Items Exam Questions With Correct Answers

What does CAOHC stand for? - Answer Council for the Accreditation in Occupational Hearing Conservation Main role of CAOHC - Answer To certify and train Occupational Hearing Conservationists (OHC) OHCS must be recertified within ________ years of initial certification. - Answer Five Tinnitus - Answer Technical term for ringing or other noises in the ears. Interference with communication, degraded job performance, stress and annoyance/fatigue - Answer Problems caused by noise in addition to hearing loss When is the best time to perform a baseline audiogram? - Answer 14 hours away from noise exposure, preferably before starting work. When is the best time to perform an annual audiogram? - 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? - Answer The inner ear or cochlea or the nerve of hearing Besides noise, one of the most frequent contributors to sensorineural hearing loss is: - 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 _______. - Answer Intensity; Decibels A sound's frequency is perceived by the ear as _____ and quantified in terms of _____. - Answer Pitch; Hertz The logarithmic average sound exposure level normalized to an 8-hour workday is called the: - Answer Time Weighted Average exposure level (TWA) The relationship between level and duration of an allowable noise exposure is called: - Answer The Exchange Rate OSHA and DOD use a ___ DB exchange rate. - Answer 5 NIOSH uses a ___ DB exchange rate. - Answer 3 Difference between OSHA and NIOSH - Answer Enforcement versus research/best practice. OSHA's noise regulation calls for a PEL of ___ DBA, an exchange rate of ___DB, and an action level of ___ DBA. - Answer 90; 5; 85 According to the OSHA regulation, what must employees and employers do if the PEL is exceeded? - Answer Consider Engineering controls, administrative controls, use hearing protection. Which is the most delicate part of the audiometric system? - Answer Headphones What are the advantages and disadvantage of manual testing? - Answer Least expensive; Controlled by examiner and operator error. What are the air conduction symbols for the left and right ear? - Answer X for left and O for right What is the most common audiometric configuration for people who work in noisy environments? - Answer High frequency sloping sensorineural hearing loss When should the calibration of sound measuring equipment be checked? - Answer Before and after use. Before taking any measurements, what are three indications that noise levels in the work environment are greater than 85 DBA? - Answer Difficulty communicating at three feet, tinnitus, dullness of hearing or temporary threshold shift. 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? - Answer 5 DB