CAOHC |ACTUAL EXAM QUESTIONS AND WELL DETAILED VERIFIED SOLUTIONS| GRADED A+| BRAND NEW 2026/2027 UPDATE

CAOHC |ACTUAL EXAM QUESTIONS AND WELL DETAILED VERIFIED
SOLUTIONS| GRADED A+| BRAND NEW 2026/2027 UPDATE


CAOHC's primary objective is to:

a. Promote hearing loss prevention by enhancing the quality of occupational hearing conser-
vation practices

b. Provide input to legislative action regarding occupational hearing program implementa-
tion

c. Train council members in occupational hearing program implementation

d. Train audiologists in occupational hearing program implementation - ANSWER A



A COHC is NOT able to train other OHCs to do manual testing, to be a Professional Supervi-
sor, or ____________________.

a. select, fit, and instruct on hearing protection devices

b. perform automated air conduction pure tone testing

c. diagnose hearing problems or interpret audiograms

d. counsel individuals about their hearing test results - ANSWER C



The sector with the highest incidence of occupational hearing loss: a. Transportation

b. Construction

c. Manufacturing

d. Military - ANSWER C



Auditory effects of noise exposure include noise-induced hearing loss, hyperacusis, and
_____________.

a. tinnitus

b. stress

c. depression



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,d. hypertension - ANSWER A



Noise-induced hearing loss typically occurs initially at:

a. 1000 Hz

b. 3000 Hz

c. 4000 Hz

d. 8000 Hz - ANSWER C



Early signs/symptoms of a noise-induced hearing loss include tinnitus, difficulty understand-
ing in background noise, and _________________.

a. vertigo/unsteadiness

b. need for visual cues

c. ear pain

d. ear discharge - ANSWER B



7. Typical characteristics of a noise-induced hearing loss include a notch at 4000 Hz, variable
susceptibility among individuals, and

_________________________.

a. bilateral and symmetrical

b. bilateral and asymmetrical

c. Unilateral

d. Loss not greater than 50 dBHL - ANSWER A



The 3 tiny bones in the middle ear collectively form the _________________. a. eustachian
tube

b. tympanic cavity

c. ossicular chain

d. organ of corti - ANSWER C


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,The bones of the middle ear (in order from eardrum to oval window) are the:

a. Maxilla, incus, stapes

b. Malleus, incus, stapes

c. Stapes, incus, malleus

d. Stapes, incus, maxilla - ANSWER A



The primary function of the outer ear is to:

a. Collect sound waves and channel them down the ear canal

b. Transmit electrical impulses to the brain

c. Equalize pressure in the tympanic cavity

d. Transform sound waves into vibrations - ANSWER A



Type of hearing loss that results from cerumen impaction:

a. Sensorineural

b. Mixed

c. Conductive

d. No hearing loss - ANSWER C



Hearing loss due to aging:

a. Noise-induced

b. Presbycusis

c. Otosclerosis

d. Otitis Externa - ANSWER B



Part of ear damaged by hazardous noise exposure:

a. Organ of corti (cochlea)



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, b. Tympanic membrane

c. Ossicular chain

d. Semi-circular canals - ANSWER A



Frequency is perceived as pitch, is measured in Hertz (Hz), and
________________________________.

a. is a significant factor for risk of developing hearing loss

b. low frequencies are easily stopped by a barrier

c. more cycles per second indicate a high frequency sound

d. more cycles per second indicate a low frequency sound - ANSWER C



A decibel (dB) is the unit of measurement for:

a. Frequency

b. Intensity

c. Duration

d. Weighting - ANSWER B



Range of human hearing at birth:

a. 20 Hz to 8,000 Hz

b. 250 Hz to 10,000 Hz

c. 20 Hz to 20,000 Hz

d. 500 Hz to 8,000 Hz - ANSWER C



Adding together two identical noise sources of 100 dBA each will result in a total of:

a. 200 dBA

b. 103 dBA

c. 105 dBA

d. 106 dBA - ANSWER B

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