CAOHC Exam Prep Guide with Questions
and Correct Answers
hertz is a unit of: - ✔✔sound frequency
decibel is a unit of: - ✔✔sound intensity
the frequency of sound is perceived as: - ✔✔pitch
what is the first thing you should do when fitting earplugs? - ✔✔a. pull the top of the ear to
align the ear canal
b. roll the earplug down into a tight, crease-free cylinder
c. CHECK THE EAR CANAL FOR ANY OCCLUSIONS
d. insert the earplug deep into the ear canal
hearing tests do not have to be conducted in a sound booth as long as maximum allowable
ambient noise levels aren't exceeded: - ✔✔true
what type of hearing loss can be attributed to noise? - ✔✔sensorineural
what is the frequency range of speech sounds? - ✔✔250-4000 Hz
OSHA requires exhaustive calibration if there is a deviation of greater than or equal to 15 dB:
- ✔✔true
the range of normal hearing is: - ✔✔0-25 dB
intermittent noise is noise that: - ✔✔a. does not end
b. FLUCTUATES IN SOUND LEVEL WITH PERIODIC INTERRUPTIONS OF
RELATIVE QUIET
c. rises continuously
,d. has been abated through the implementation of engineering controls
e. none of the above
functional hearing loss is also known as pseudohypacusis: - ✔✔true
conventional earplugs typically reduce high frequency noise more than low-frequency noise:
- ✔✔true
OSHA allows retests to be substituted for original tests if done within how many days of the
original test? - ✔✔30 days
administrative controls to limit noise exposure to include: - ✔✔limiting the time a worker
spends at a noise source
when a worker's exposure level reaches the "action level", the employer must: - ✔✔include
the worker in a hearing conservation program
what components does OSHA require for worker training? - ✔✔a: effects of noise on hearing
b: purpose of hearing protectors
c: purpose of hearing testing
d: instructions on selecting and fitting protectors
e. ALL OF THE ABOVE
what is the document that OSHA requires to report hearing loss incidents? - ✔✔form 300
the missions of CAOHC include: - ✔✔guiding industry on successful implementation of
hearing conservation programs
NIHL typically affects: - ✔✔higher frequencies first
, what is the term for temporary hearing loss after noise exposure? - ✔✔temporary threshold
shift
which of the following is NOT an occupational noise regulatory body? - ✔✔a. FRA
b: MSHA
C: CDC
d: OSHA
e: NIOSH
in order to apply age correction to STS calculations, the worker's age and sex are required: -
✔✔true
which of the following is NOT one of NIOSH's "5 Cs of HPDs" to describe the barriers of
protective devices: - ✔✔a. comfort
b. CARE
c. convenience
d. communication
e. cost
when should a baseline test be performed (ideally)? - ✔✔a. BEFORE THE WORKER'S
SHIFT
b. in the middle of the worker's shift
c. after the worker's shift
the middle ear is the primary site of damage due to hearing loss: - ✔✔false
noise dosimeters are the best tool to measure noise exposure for workers whose exposures
vary during their shift: - ✔✔true
in addition to the OSHA requirements, the FRA requires what datum on audiograms? - ✔✔a.
worker gender
b. AUDIOMETER MODEL
and Correct Answers
hertz is a unit of: - ✔✔sound frequency
decibel is a unit of: - ✔✔sound intensity
the frequency of sound is perceived as: - ✔✔pitch
what is the first thing you should do when fitting earplugs? - ✔✔a. pull the top of the ear to
align the ear canal
b. roll the earplug down into a tight, crease-free cylinder
c. CHECK THE EAR CANAL FOR ANY OCCLUSIONS
d. insert the earplug deep into the ear canal
hearing tests do not have to be conducted in a sound booth as long as maximum allowable
ambient noise levels aren't exceeded: - ✔✔true
what type of hearing loss can be attributed to noise? - ✔✔sensorineural
what is the frequency range of speech sounds? - ✔✔250-4000 Hz
OSHA requires exhaustive calibration if there is a deviation of greater than or equal to 15 dB:
- ✔✔true
the range of normal hearing is: - ✔✔0-25 dB
intermittent noise is noise that: - ✔✔a. does not end
b. FLUCTUATES IN SOUND LEVEL WITH PERIODIC INTERRUPTIONS OF
RELATIVE QUIET
c. rises continuously
,d. has been abated through the implementation of engineering controls
e. none of the above
functional hearing loss is also known as pseudohypacusis: - ✔✔true
conventional earplugs typically reduce high frequency noise more than low-frequency noise:
- ✔✔true
OSHA allows retests to be substituted for original tests if done within how many days of the
original test? - ✔✔30 days
administrative controls to limit noise exposure to include: - ✔✔limiting the time a worker
spends at a noise source
when a worker's exposure level reaches the "action level", the employer must: - ✔✔include
the worker in a hearing conservation program
what components does OSHA require for worker training? - ✔✔a: effects of noise on hearing
b: purpose of hearing protectors
c: purpose of hearing testing
d: instructions on selecting and fitting protectors
e. ALL OF THE ABOVE
what is the document that OSHA requires to report hearing loss incidents? - ✔✔form 300
the missions of CAOHC include: - ✔✔guiding industry on successful implementation of
hearing conservation programs
NIHL typically affects: - ✔✔higher frequencies first
, what is the term for temporary hearing loss after noise exposure? - ✔✔temporary threshold
shift
which of the following is NOT an occupational noise regulatory body? - ✔✔a. FRA
b: MSHA
C: CDC
d: OSHA
e: NIOSH
in order to apply age correction to STS calculations, the worker's age and sex are required: -
✔✔true
which of the following is NOT one of NIOSH's "5 Cs of HPDs" to describe the barriers of
protective devices: - ✔✔a. comfort
b. CARE
c. convenience
d. communication
e. cost
when should a baseline test be performed (ideally)? - ✔✔a. BEFORE THE WORKER'S
SHIFT
b. in the middle of the worker's shift
c. after the worker's shift
the middle ear is the primary site of damage due to hearing loss: - ✔✔false
noise dosimeters are the best tool to measure noise exposure for workers whose exposures
vary during their shift: - ✔✔true
in addition to the OSHA requirements, the FRA requires what datum on audiograms? - ✔✔a.
worker gender
b. AUDIOMETER MODEL
