CAOHC EXAM QUESTIONS AND ANSWERS
The missions of CAOHC include: - Answers- guiding industry on successful
implementation of hearing conservation programs
NRR calculations are based on an EPA specification that uses a withdrawn ANSI
standard. - Answers- true
Age corrections values are determined by: - Answers- Consulting tables published in
Appendix F of the regulations
Continuous noise is defined as noise lasting longer than: - Answers- 1sec
Administrative controls to limit noise exposure include which of the following? -
Answers- Limiting the time a worker spends at a noise source
What type of hearing loss can be attributed to noise? - Answers- sensorineural
State hearing regulations must meet or exceed federal regulations. - Answers- true
If a daily calibration threshold is off by more than 5 dB, the audiometer must be
acoustically calibrated. - Answers- true
in addition to the OSHA requirements, FRA requires what datum on audiograms? -
Answers- audiometer model
FRA requires worker training within 180 days of enrollment in a hearing conservation
program. - Answers- true
What is the amount of attenuation achieved when earplugs are worn in combination with
earmuffs? - Answers- 5 dB more than the higher attenuation of the two devices
Which of the following is NOT an occupational noise regulatory body? - Answers- CDC
Hertz is a unit of? - Answers- sound frequency
During acoustic calibration no adjustments are made to an audiometer. - Answers- true
functional hearing loss is also known as pseudohypacusis. - Answers- true
Which of the following is NOT a datum OSHA requires on audiograms? - Answers-
workers birthday
OSHA defines a 'persistent STS' as an STS lasting more than:
21 days
30 days
, 45 days
60 days - Answers- none of the above
What is the first thing you should do when fitting earplugs? - Answers- check canal for
any occlusions
Properly fitted earmuffs should cause the wearer's voice to sound deeper or muffled. -
Answers- true
Which of the following statements regarding NRR are true?
Real world attenuation is, on average, about one-third to one-half of the NRR
A higher NRR does not accurately reflect better attenuation in the workplace
Earplug attenuation varies widely among a group of wearers, regardless of NRR -
Answers- all of the above
Which of the following is a method to verify proper plug insertion? - Answers- Acoustic
check observing noise level change when cupping hands over ear
Acoustic neuromas can manifest as assymetric or unilateral loss. - Answers- true
OSHA requires exhaustive calibration of audiometers: - Answers- every 2yrs
Earmuffs should be cleaned with solvents regularly to prevent particulate build-up. -
Answers- false
Which of the following is NOT an element of a Hearing Conservation Program? -
Answers- annual spectrum testing
What decibel level is the action level? - Answers- 85dB 8hr TWA
When performing a test it is best practice to: - Answers- Vary the interval between tone
presentations
FRA requires written notification of a Standard Threshold Shift within how many days? -
Answers- 30
MSHA requires written notification of a Standard Threshold Shift within how many days?
- Answers- 10
When visually inspecting an ear canal, an otoscope should be held like a hammer. -
Answers- false
No follow-up is required for an STS if a physician determines the loss was not caused
on the job. - Answers- true
Audiometric testing is also known as hearing screening. - Answers- false
The missions of CAOHC include: - Answers- guiding industry on successful
implementation of hearing conservation programs
NRR calculations are based on an EPA specification that uses a withdrawn ANSI
standard. - Answers- true
Age corrections values are determined by: - Answers- Consulting tables published in
Appendix F of the regulations
Continuous noise is defined as noise lasting longer than: - Answers- 1sec
Administrative controls to limit noise exposure include which of the following? -
Answers- Limiting the time a worker spends at a noise source
What type of hearing loss can be attributed to noise? - Answers- sensorineural
State hearing regulations must meet or exceed federal regulations. - Answers- true
If a daily calibration threshold is off by more than 5 dB, the audiometer must be
acoustically calibrated. - Answers- true
in addition to the OSHA requirements, FRA requires what datum on audiograms? -
Answers- audiometer model
FRA requires worker training within 180 days of enrollment in a hearing conservation
program. - Answers- true
What is the amount of attenuation achieved when earplugs are worn in combination with
earmuffs? - Answers- 5 dB more than the higher attenuation of the two devices
Which of the following is NOT an occupational noise regulatory body? - Answers- CDC
Hertz is a unit of? - Answers- sound frequency
During acoustic calibration no adjustments are made to an audiometer. - Answers- true
functional hearing loss is also known as pseudohypacusis. - Answers- true
Which of the following is NOT a datum OSHA requires on audiograms? - Answers-
workers birthday
OSHA defines a 'persistent STS' as an STS lasting more than:
21 days
30 days
, 45 days
60 days - Answers- none of the above
What is the first thing you should do when fitting earplugs? - Answers- check canal for
any occlusions
Properly fitted earmuffs should cause the wearer's voice to sound deeper or muffled. -
Answers- true
Which of the following statements regarding NRR are true?
Real world attenuation is, on average, about one-third to one-half of the NRR
A higher NRR does not accurately reflect better attenuation in the workplace
Earplug attenuation varies widely among a group of wearers, regardless of NRR -
Answers- all of the above
Which of the following is a method to verify proper plug insertion? - Answers- Acoustic
check observing noise level change when cupping hands over ear
Acoustic neuromas can manifest as assymetric or unilateral loss. - Answers- true
OSHA requires exhaustive calibration of audiometers: - Answers- every 2yrs
Earmuffs should be cleaned with solvents regularly to prevent particulate build-up. -
Answers- false
Which of the following is NOT an element of a Hearing Conservation Program? -
Answers- annual spectrum testing
What decibel level is the action level? - Answers- 85dB 8hr TWA
When performing a test it is best practice to: - Answers- Vary the interval between tone
presentations
FRA requires written notification of a Standard Threshold Shift within how many days? -
Answers- 30
MSHA requires written notification of a Standard Threshold Shift within how many days?
- Answers- 10
When visually inspecting an ear canal, an otoscope should be held like a hammer. -
Answers- false
No follow-up is required for an STS if a physician determines the loss was not caused
on the job. - Answers- true
Audiometric testing is also known as hearing screening. - Answers- false
