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CAOHC EXAM QUESTIONS AND ANSWERS
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CAOHC EXAM QUESTIONS AND ANSWERS
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CAOHC EXAM QUESTIONS AND ANSWERSCAOHC's primary objective is to:
a. Promote hearing loss prevention by enhancing the quality of occupational hearing
conservation practices
b. Provide input to legislative action regarding occupational hearing program
implementation
c. Train council members in occupational hearing program implementation
d. Train audiologists in occupational hearing program implementation - Answers- A
A COHC is NOT able to train other OHCs to do manual testing, to be a Professional
Supervisor, 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 - Answers- C
The sector with the highest incidence of occupational hearing loss: a. Transportation
b. Construction
c. Manufacturing
d. Military - Answers- C
Auditory effects of noise exposure include noise-induced hearing loss, hyperacusis, and
_____________.
a. tinnitus
b. stress
c. depression
d. hypertension - Answers- A
Hearing loss due to aging:
a. Noise-induced
b. Presbycusis
c. Otosclerosis
d. Otitis Externa - Answers- B
Part of ear damaged by hazardous noise exposure:
a. Organ of corti (cochlea)
b. Tympanic membrane
c. Ossicular chain
d. Semi-circular canals - Answers- 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 - Answers- C
A decibel (dB) is the unit of measurement for:
a. Frequency
b. Intensity
c. Duration
d. Weighting - Answers- 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 - Answers- 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 - Answers- B
The range of intensity (from just audible to discomfort) for human hearing is:
a. 0 dB - 100 dB
b. 0 dB - 85 dB
c. 0 dB - 140 dB
d. 0 dB - 90 dB - Answers- C
.The relationship between _______ and ________ is what determines the risk of noise-
induced hearing loss:
a. intensity; frequency
b. duration; intensity
c. duration; frequency
d. intensity; weighting - Answers- B
The ___ weighting network resembles how the human ear responds to sound and is
used in HCPs to determine risk:
a. A
b. B
c. C
d. Z - Answers- A
Steady-state or continuous noise has a duration of:
a. At least 5 seconds
b. .5 second or longer
c. 1 second or longer
d. At least 10 seconds - Answers- C
, Time-weighted average is based on:
a. No defined period of time
b. 8 hours
c. 10 hours
d. 40 hours - Answers- B
Noise-induced hearing loss typically occurs initially at:
a. 1000 Hz
b. 3000 Hz
c. 4000 Hz
d. 8000 Hz - Answers- C
Early signs/symptoms of a noise-induced hearing loss include tinnitus, difficulty
understanding in background noise, and _________________.
a. vertigo/unsteadiness
b. need for visual cues
c. ear pain
d. ear discharge - Answers- 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 - Answers- 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 - Answers- C
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 - Answers- 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 - Answers- A
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