CAOHC EXAM PREP GUIDE 2025
COMPREHENSIVE REVIEW WITH SOLVED
QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+
◉decibel is a unit of: . Answer: sound intensity
◉the frequency of sound is perceived as: . Answer: pitch
◉what is the first thing you should do when fitting earplugs? . Answer:
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: . Answer: true
◉what type of hearing loss can be attributed to noise? . Answer:
sensorineural
,◉what is the frequency range of speech sounds? . Answer: 250-4000 Hz
◉OSHA requires exhaustive calibration if there is a deviation of greater
than or equal to 15 dB: . Answer: true
◉the range of normal hearing is: . Answer: 0-25 dB
◉intermittent noise is noise that: . Answer: 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: . Answer:
true
◉conventional earplugs typically reduce high frequency noise more than
low-frequency noise: . Answer: true
◉OSHA allows retests to be substituted for original tests if done within
how many days of the original test? . Answer: 30 days
,◉administrative controls to limit noise exposure to include: . Answer:
limiting the time a worker spends at a noise source
◉when a worker's exposure level reaches the "action level", the
employer must: . Answer: include the worker in a hearing conservation
program
◉what components does OSHA require for worker training? . Answer:
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? . Answer: form 300
◉the missions of CAOHC include: . Answer: guiding industry on
successful implementation of hearing conservation programs
◉NIHL typically affects: . Answer: higher frequencies first
, ◉what is the term for temporary hearing loss after noise exposure? .
Answer: temporary threshold shift
◉which of the following is NOT an occupational noise regulatory body?
. Answer: 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: . Answer: true
◉which of the following is NOT one of NIOSH's "5 Cs of HPDs" to
describe the barriers of protective devices: . Answer: a. comfort
b. CARE
c. convenience
d. communication
e. cost
◉when should a baseline test be performed (ideally)? . Answer: a.
BEFORE THE WORKER'S SHIFT
b. in the middle of the worker's shift
COMPREHENSIVE REVIEW WITH SOLVED
QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+
◉decibel is a unit of: . Answer: sound intensity
◉the frequency of sound is perceived as: . Answer: pitch
◉what is the first thing you should do when fitting earplugs? . Answer:
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: . Answer: true
◉what type of hearing loss can be attributed to noise? . Answer:
sensorineural
,◉what is the frequency range of speech sounds? . Answer: 250-4000 Hz
◉OSHA requires exhaustive calibration if there is a deviation of greater
than or equal to 15 dB: . Answer: true
◉the range of normal hearing is: . Answer: 0-25 dB
◉intermittent noise is noise that: . Answer: 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: . Answer:
true
◉conventional earplugs typically reduce high frequency noise more than
low-frequency noise: . Answer: true
◉OSHA allows retests to be substituted for original tests if done within
how many days of the original test? . Answer: 30 days
,◉administrative controls to limit noise exposure to include: . Answer:
limiting the time a worker spends at a noise source
◉when a worker's exposure level reaches the "action level", the
employer must: . Answer: include the worker in a hearing conservation
program
◉what components does OSHA require for worker training? . Answer:
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? . Answer: form 300
◉the missions of CAOHC include: . Answer: guiding industry on
successful implementation of hearing conservation programs
◉NIHL typically affects: . Answer: higher frequencies first
, ◉what is the term for temporary hearing loss after noise exposure? .
Answer: temporary threshold shift
◉which of the following is NOT an occupational noise regulatory body?
. Answer: 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: . Answer: true
◉which of the following is NOT one of NIOSH's "5 Cs of HPDs" to
describe the barriers of protective devices: . Answer: a. comfort
b. CARE
c. convenience
d. communication
e. cost
◉when should a baseline test be performed (ideally)? . Answer: a.
BEFORE THE WORKER'S SHIFT
b. in the middle of the worker's shift
