CAOHC Study Set UPDATED ACTUAL Questions and CORRECT Answers
Which occupational sector accounts for the highest inci-
Manufacturing
dence of noise-induced hearing loss?
Tinnitus A buzzing or ringing in the ears is known as
Noise exposures are considered likely to be harmful if
Three shouting is required in order to communicate to a person
feet away
Painless, Progressive, Permanent, Preventable What are the four P's of Noise-Induced Hearing Loss
140 dBP Impulse noise becomes hazardous at
Frequency Hertz (Hz) is used to measure
Pitch The frequency of sound is perceived as
Decibels (dB) The amplitude/intensity of a sound is measured in
What reflects the relationship between the allowable ex-
Exchange rate
posure time and the noise intensity level?
OSHA prescribes a permissible exposure limit (PEL) of
90/85 dBA TWA and the DoD prescribes a PEL of
Workplace hazard surveys are completed using the
A
weighting scale
OSHA prescribes an action level of dBA TWA
85/85
and DoD prescribes an action level of
Adding a muffler to noisy equipment to reduce noise
engineering
exposure is an example of what kind of control?
250-4000 Hz Human speech is located in this range of hearing
malleus, incus, stapes What are the three bones of the middle ear?
Time Weighted Average is based on an hour
8
exposure
, The best hearing protection is the one that you
use and use correctly
Presbycusis Aging related hearing loss is known as
The organization responsible for conducting research and
NIOSH making recommendations for best/recommended prac-
tices
preventable NIHL is
Biological calibration checks must be performed how of-
Daily
ten?
A noise notch found in audiogram results is indicative of
Sensorineural
what type of hearing loss?
Conductive Impacted cerumen can cause this type of hearing loss
Inner ear Sensorineural hearing loss affects what part of the ear?
5 OHCs must be recertified every years
The DoD uses a dB time-intensity exchange
3/5 rate where OSHA prescribes a dB time-inten-
sity exchange rate
Excessive background noise in the test area generally af-
500
fects the threshold at Hertz (Hz) the most
The hearing threshold level is defined as the point where
50%
the subject hears the tone of the time
2217 The daily calibration check is documented on the DD
Inner ear The area of the ear most affected by noise damage
What term does hearing protector packaging use to indi-
Noise Reduction Rating (NRR)
cate noise attenuation?
Cochlear hair cell damage Hearing loss from noise exposure is usually due to
2/7
Which occupational sector accounts for the highest inci-
Manufacturing
dence of noise-induced hearing loss?
Tinnitus A buzzing or ringing in the ears is known as
Noise exposures are considered likely to be harmful if
Three shouting is required in order to communicate to a person
feet away
Painless, Progressive, Permanent, Preventable What are the four P's of Noise-Induced Hearing Loss
140 dBP Impulse noise becomes hazardous at
Frequency Hertz (Hz) is used to measure
Pitch The frequency of sound is perceived as
Decibels (dB) The amplitude/intensity of a sound is measured in
What reflects the relationship between the allowable ex-
Exchange rate
posure time and the noise intensity level?
OSHA prescribes a permissible exposure limit (PEL) of
90/85 dBA TWA and the DoD prescribes a PEL of
Workplace hazard surveys are completed using the
A
weighting scale
OSHA prescribes an action level of dBA TWA
85/85
and DoD prescribes an action level of
Adding a muffler to noisy equipment to reduce noise
engineering
exposure is an example of what kind of control?
250-4000 Hz Human speech is located in this range of hearing
malleus, incus, stapes What are the three bones of the middle ear?
Time Weighted Average is based on an hour
8
exposure
, The best hearing protection is the one that you
use and use correctly
Presbycusis Aging related hearing loss is known as
The organization responsible for conducting research and
NIOSH making recommendations for best/recommended prac-
tices
preventable NIHL is
Biological calibration checks must be performed how of-
Daily
ten?
A noise notch found in audiogram results is indicative of
Sensorineural
what type of hearing loss?
Conductive Impacted cerumen can cause this type of hearing loss
Inner ear Sensorineural hearing loss affects what part of the ear?
5 OHCs must be recertified every years
The DoD uses a dB time-intensity exchange
3/5 rate where OSHA prescribes a dB time-inten-
sity exchange rate
Excessive background noise in the test area generally af-
500
fects the threshold at Hertz (Hz) the most
The hearing threshold level is defined as the point where
50%
the subject hears the tone of the time
2217 The daily calibration check is documented on the DD
Inner ear The area of the ear most affected by noise damage
What term does hearing protector packaging use to indi-
Noise Reduction Rating (NRR)
cate noise attenuation?
Cochlear hair cell damage Hearing loss from noise exposure is usually due to
2/7
