CAOHC Exam Prep Latest Update 2024-2025 450+ Questions and 100% Verified Correct Answers Guaranteed A+ At First Attempt
"hearing levels" used by audiometers are also known as "sound pressure levels": -
CORRECT ANSWER: false
29 CFR 1910.95 is an example of a standard, not a regulation: - CORRECT ANSWER: false
a sound level meter is used to calculate sound wave frequency: - CORRECT ANSWER: false
acoustic neuromas can manifest as an asymmetric or unilateral hearing loss: -
CORRECT ANSWER: true
administrative controls to limit noise exposure to include: - CORRECT ANSWER: limiting the time a worker spends at a noise source
after rolling down a foam plug, you should wait 30 seconds before insertion: -
CORRECT ANSWER: false
age correction values are determined by: - CORRECT ANSWER: a. use of a binomial equation published in Appendix D of the regulations
- CONSULTING TABLES PUBLISHED IN APPENDIX F OF THE REGULATIONS
ambient noise above permissible levels during hearing testing may: - CORRECT
ANSWER: a. increase the number of STS
- alter test thresholds
- distract test subjects
- ALL OF THE ABOVE
- none of the above
an accurate STS calculation must not include age correction: - CORRECT ANSWER: false
asymmetric hearing loss is when the loss in both ears is approximately equal: -
CORRECT ANSWER: false
audiometric testing is also known as a hearing screening: - CORRECT ANSWER: false
banded earplugs are also known as "canal caps" - CORRECT ANSWER: false
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banded earplugs are designed to be disposed of after one use: - CORRECT ANSWER: false
baselines may never be revised: - CORRECT ANSWER: false
compliance with OSHA regulations implies that NIHL prevention best practices have been followed: - CORRECT ANSWER: false
conductive hearing loss is due to issues with the inner ear: - CORRECT ANSWER: false
continuous noise is defined as noise lasting longer than: - CORRECT ANSWER: a. 1
SECOND
- 2 seconds
- 3 seconds
- 5 seconds
- none of the above
conventional earplugs typically reduce high frequency noise more than low-frequency noise: - CORRECT ANSWER: true
daily biological checks should include a listening check of the audiometer: - CORRECT
ANSWER: true
decibel is a unit of: - CORRECT ANSWER: sound intensity
during acoustic calibration, no adjustments are made to an audiometer: - CORRECT
ANSWER: true
during audiometry, the workers should be seated so they may see the OHC's activities:
- CORRECT ANSWER: false
each ear may have a different baseline test: - CORRECT ANSWER: true
earmuffs should be cleaned with solvents regularly to prevent particulate build-up: -
CORRECT ANSWER: false
engineering controls to limit noise exposure include which of the following? - CORRECT
ANSWER: a. lubricating machinery
- enclosing the noise source
- changing to lower-noise tools and machinery
- erecting barriers between the noise source and worker
- ALL OF THE ABOVE
flat attenuation earplugs allow for better speech recognition than traditional earplugs: -
CORRECT ANSWER: false 2 / 4
flat hearing loss can be caused by which of the following? - CORRECT ANSWER: a.
equipment malfunction
- worker response error
- intentionally not responding to tones to simulate a loss
- conductive pathology
- ALL OF THE ABOVE
for best results, worker training procedures should be evaluated for effectiveness and revised according to findings: - CORRECT ANSWER: true
for how many years does OSHA require audiogram records be kept? - CORRECT
ANSWER: a. 1 year
- 2 years
- 5 years
- DURATION OF EMPLOYMENT
- OSHA does not specify the time
for otoscopy the OHC should select the largest speculum that will fit in the ear canal: -
CORRECT ANSWER: true
FRA requires worker training within 180 days of enrollment in a hearing conservation program: - CORRECT ANSWER: true
FRA requires written notification of an STS within: - CORRECT ANSWER: 30 days
functional hearing loss is also known as pseudohypacusis: - CORRECT ANSWER: true
group worker training is proven to be more effective than one-on-one training: -
CORRECT ANSWER: false
hearing aids should be removed prior to audiometric testing: - CORRECT ANSWER: true
hearing loss from non-occupational sources is called "sociocusis": - CORRECT
ANSWER: true
hearing protection devices are worn to: - CORRECT ANSWER: a. reduce the risk of ear infection
- eliminate all noise except in the range of speech frequencies
- REDUCE THE CHANCE OF NIHL
- all of the above
hearing tests do not have to be conducted in a sound booth as long as maximum allowable ambient noise levels aren't exceeded: - CORRECT ANSWER: true
- / 4
hertz is a unit of: - CORRECT ANSWER: sound frequency
how many years does OSHA require noise exposure records be kept? - CORRECT
ANSWER: a. 1 year
- 2 YEARS
- 5 years
- duration of employment
- OSHA does not specify the time
if a worker fails to respond to soft tones, whisper audiometry should be employed: -
CORRECT ANSWER: false
if daily calibration threshold is off by more than 5 dB, the audiometer must be acoustically calibrated: - CORRECT ANSWER: true
if NIOSH's recommended 3 dB exchange rate is used, which of the following equals a
100% noise dose? - CORRECT ANSWER: a. 4 hours in 87 dB
- 4 hours in 90 dB
- 4 HOURS IN 93 dB
- 8 hours in 87 dB
- 8 hours in 93 dB
if the diaphragm of the headphones is not positioned over the ear canal, response to high frequency may be affected: - CORRECT ANSWER: true
impulse noise is defined as noise lasting less than: - CORRECT ANSWER: a. 1
SECOND
- 2 seconds
- 3 seconds
- 5 seconds
- none of the above
in addition to the OSHA requirements, the FRA requires what datum on audiograms? -
CORRECT ANSWER: a. worker gender
- AUDIOMETER MODEL
- examiner CAOHC number
- HCP professional supervisor name
- audiometric room certification date
in addition to the OSHA requirements, the FRA requires which of the following for
worker training? - CORRECT ANSWER: a. explanation of noise operational controls
- purpose of noise monitoring
- expected range of workplace noise exposure levels
- employee rights and responsibilities
- ALL OF THE ABOVE
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