CAOHC Practice Test Exam - Complete Solutions Updated

CAOHC Practice Test Exam - Complete Solutions Updated The missions of CAOHC include: - answer - guiding industry on successful implementation of hearing conservation programs NRR calculations are based on an EPA specification that uses a withdrawn ANSI standard. - answer - true Age corrections values are determined by: - answer - Consulting tables published in Appendix F of the regulations Continuous noise is defined as noise lasting longer than: - answer - 1sec Administrative controls to limit noise exposure include which of the following? - answer - Limiting the time a worker spends at a noise source What type of hearing loss can be attributed to noise? - answer - sensorineural State hearing regulations must meet or exceed federal regulations. - answer - true If a daily calibration threshold is off by more than 5 dB, the audiometer must be acoustically calibrated. - answer - true in addition to the OSHA requirements, FRA requires what datum on audiograms? - answer - audiometer model When visually inspecting an ear canal, an otoscope should be held like a hammer. - answer - false No follow-up is required for an STS if a physician determines the loss was not caused on the job. - answer - true Audiometric testing is also known as hearing screening. - answer - false When a worker's exposure reaches the 'action level', the employer must: - answer - include the worker in the hearing conservation program Which of the following is true about banded earplugs? - answer - They are useful in intermittent noise environments What is the document MSHA requires to report hearing loss incidents? - answer - form 7000-1 FRA requires worker training within 180 days of enrollment in a hearing conservation program. - answer - true What is the amount of attenuation achieved when earplugs are worn in combination with earmuffs? - answer - 5 dB more than the higher attenuation of the two devices Which of the following is NOT an occupational noise regulatory body? - answer - CDC Hertz is a unit of? - answer - sound frequency During acoustic calibration no adjustments are made to an audiometer. - answer - true functional hearing loss is also known as pseudohypacusis. - answer - true Which of the following is NOT a datum OSHA requires on audiograms? - answer - workers birthday OSHA defines a 'persistent STS' as an STS lasting more than: 21 days 30 days 45 days 60 days - answer - none of the above What is the first thing you should do when fitting earplugs? - answer - check canal for any occlusions Properly fitted earmuffs should cause the wearer's voice to sound deeper or muffled. - answer - true Which of the following statements regarding NRR are true? Real world attenuation is, on average, about one-third to one-half of the NRR A higher NRR does not accurately reflect better attenuation in the workplace Earplug attenuation varies widely among a group of wearers, regardless of NRR - answer - all of the above Which of the following is a method to verify proper plug insertion? - answer - Acoustic check observing noise level change when cupping hands over ear Acoustic neuromas can manifest as assymetric or unilateral loss. - answer - true OSHA requires exhaustive calibration of audiometers: - answer - every 2yrs Earmuffs should be cleaned with solvents regularly to prevent particulate build-up. - answer - false Which of the following is NOT an element of a Hearing Conservation Program? - answer - annual spectrum testing What decibel level is the action level? - answer - 85dB 8hr TWA When performing a test it is best practice to: - answer - Vary the interval between tone presentations FRA requires written notification of a Standard Threshold Shift within how many days? - answer - 30 MSHA requires written notification of a Standard Threshold Shift within how many days? - answer - 10 What type of tone is employed in audiometry? - answer - pure NIOSH recommends against using age correction: - answer - true A bio-acoustic s