CAOHC STUDY GUIDE EXAM 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔what term does hearing protector packaging use to indicate noise attenuation? -
✔✔a. NOISE REDUCTION RATING
b. sound dampening level
c. noise adjustment rating
d. sound abatement level
e. noise protection rating
✔✔engineering controls to limit noise exposure include which of the following? - ✔✔a.
lubricating machinery
b. enclosing the noise source
c. changing to lower-noise tools and machinery
d. erecting barriers between the noise source and worker
e. ALL OF THE ABOVE
✔✔when using earplugs, it's always best to use those that reduce as much noise as
possible: - ✔✔false
✔✔what is 100% noise dose? - ✔✔a. the recommended daily allowance
b. 100 mg
c. 8-HOUR TWA OF 90 dBA
d. OSHA's term for maximum loss achievable
e. noise that covers the entire spectrum from 20-20,000 Hz
✔✔after rolling down a foam plug, you should wait 30 seconds before insertion: -
✔✔false
✔✔continuous noise is defined as noise lasting longer than: - ✔✔a. 1 SECOND
b. 2 seconds
c. 3 seconds
d. 5 seconds
e. none of the above
✔✔when determining a threshold, a negative response should be followed by lowering
the hearing level 10 dB: - ✔✔false
✔✔OSHA requires reporting when there is an STS and which of the following? - ✔✔a.
the STS is persistent for at least 60 days
b. HEARING LEVEL AVERAGE AT 2K, 3K, AND 4K IS GREATER THAN OR EQUAL
TO 25 dB
c. the professional supervisor deems the test a problem audiogram
d. one or more medical history responses indicate a potential pathology
, e. none of the above
✔✔conductive hearing loss is due to issues with the inner ear: - ✔✔false
✔✔banded earplugs are also known as "canal caps" - ✔✔false
✔✔which of the following may motivate workers during worker training? - ✔✔a. using
the employers actual hearing protection devices
b. using engaging training materials
c. tailoring training to the organization and worker
d. ALL OF THE ABOVE
e. none of the above
✔✔which of the following is true about banded earplugs? - ✔✔a. they have a stripe in
the middle
b. they must be inserted with clean hands
c. THEY ARE USEFUL IN INTERMITTENT NOISE ENVIRONMENTS
d. they cannot be washed
e. all of the above
✔✔which of the following is a reason NRRs don't correlate with real-world attenuation? -
✔✔a. experts are used to fit earplugs during NRR measurements
b. many earplug wearers do not insert plugs properly
c. many don't wear earplugs that properly fit
d. ALL OF THE ABOVE
✔✔daily biological checks should include a listening check of the audiometer: - ✔✔true
✔✔how many years does OSHA require noise exposure records be kept? - ✔✔a. 1 year
b. 2 YEARS
c. 5 years
d. duration of employment
e. OSHA does not specify the time
✔✔when determining a threshold, a negative response should be followed by lowering
the hearing level 5 dB: - ✔✔false
✔✔which of the following is NOT a member of the hearing conservation team? - ✔✔a.
OHC
b. industrial hygienist
c. safety engineer
d. audiologist
e. NONE OF THE ABOVE
✔✔you don't need to open the ear canal when inserting pre-molded plugs: - ✔✔false
AND SOLUTIONS RATED A+
✔✔what term does hearing protector packaging use to indicate noise attenuation? -
✔✔a. NOISE REDUCTION RATING
b. sound dampening level
c. noise adjustment rating
d. sound abatement level
e. noise protection rating
✔✔engineering controls to limit noise exposure include which of the following? - ✔✔a.
lubricating machinery
b. enclosing the noise source
c. changing to lower-noise tools and machinery
d. erecting barriers between the noise source and worker
e. ALL OF THE ABOVE
✔✔when using earplugs, it's always best to use those that reduce as much noise as
possible: - ✔✔false
✔✔what is 100% noise dose? - ✔✔a. the recommended daily allowance
b. 100 mg
c. 8-HOUR TWA OF 90 dBA
d. OSHA's term for maximum loss achievable
e. noise that covers the entire spectrum from 20-20,000 Hz
✔✔after rolling down a foam plug, you should wait 30 seconds before insertion: -
✔✔false
✔✔continuous noise is defined as noise lasting longer than: - ✔✔a. 1 SECOND
b. 2 seconds
c. 3 seconds
d. 5 seconds
e. none of the above
✔✔when determining a threshold, a negative response should be followed by lowering
the hearing level 10 dB: - ✔✔false
✔✔OSHA requires reporting when there is an STS and which of the following? - ✔✔a.
the STS is persistent for at least 60 days
b. HEARING LEVEL AVERAGE AT 2K, 3K, AND 4K IS GREATER THAN OR EQUAL
TO 25 dB
c. the professional supervisor deems the test a problem audiogram
d. one or more medical history responses indicate a potential pathology
, e. none of the above
✔✔conductive hearing loss is due to issues with the inner ear: - ✔✔false
✔✔banded earplugs are also known as "canal caps" - ✔✔false
✔✔which of the following may motivate workers during worker training? - ✔✔a. using
the employers actual hearing protection devices
b. using engaging training materials
c. tailoring training to the organization and worker
d. ALL OF THE ABOVE
e. none of the above
✔✔which of the following is true about banded earplugs? - ✔✔a. they have a stripe in
the middle
b. they must be inserted with clean hands
c. THEY ARE USEFUL IN INTERMITTENT NOISE ENVIRONMENTS
d. they cannot be washed
e. all of the above
✔✔which of the following is a reason NRRs don't correlate with real-world attenuation? -
✔✔a. experts are used to fit earplugs during NRR measurements
b. many earplug wearers do not insert plugs properly
c. many don't wear earplugs that properly fit
d. ALL OF THE ABOVE
✔✔daily biological checks should include a listening check of the audiometer: - ✔✔true
✔✔how many years does OSHA require noise exposure records be kept? - ✔✔a. 1 year
b. 2 YEARS
c. 5 years
d. duration of employment
e. OSHA does not specify the time
✔✔when determining a threshold, a negative response should be followed by lowering
the hearing level 5 dB: - ✔✔false
✔✔which of the following is NOT a member of the hearing conservation team? - ✔✔a.
OHC
b. industrial hygienist
c. safety engineer
d. audiologist
e. NONE OF THE ABOVE
✔✔you don't need to open the ear canal when inserting pre-molded plugs: - ✔✔false
