CAOHC ACTUAL EXAM QUESTIONS AND WELL DETAILED VERIFIED
SOLUTIONS| GRADED A+| BRAND NEW 2026/2027 UPDATE
Unit of measurement for frequency (pitch) - ANSWER Hertz (Hz) or Kilohertz (kHz)
Time-Weighted Average changes if an employee works longer than _____ hour shifts. - AN-
SWER 8 hour
Time-Weighted Average calculates ________________________ or dB____ and the
________________ of noise exposure. - ANSWER Amplitude ; dB(A) ; duration
According to OSHA, the ACTION LEVEL (AL) at which workers should be included in a hearing
conservation program occurs when they are exposed to a consistent sound level of
___________ dB_____ for an entire ____-hour shift. - ANSWER 85dB(A) ; 8-hour shift
According to OSHA, the permissible exposure limit (PEL) for 8 hours that should not be ex-
ceeded is: - ANSWER 90 dB(A)
Several government agencies, including ______, _________, FRA, and individual state and
local governments, develop and publish noise related regulations requiring compliance by
employers. - ANSWER OSHA ; DoD
If more than one regulation applies to a workplace, be sure to follow the most
_______________ one. - ANSWER Stringent
Regardless of the 8-hour average, impact or impulse noise exposure should never exceed
___________ dB(P) - ANSWER 140 dB(P)
If the 8-hour Time-Weighted Average is 90 dB(A) or above, the Permissible Exposure Limit
has been reached and additional requirements apply. These include:
1
,1. The use of __________ __________ becomes mandatory.
2. Employers must consider feasible ________________ or ________________ controls to
reduce noise exposure.
3. Employers must ensure hearing protection reduces sound levels reaching the ear to below
________ db_____. - ANSWER 1. hearing protection
2. engineering or administrative
3. 90 dB(A)
Noise exposures are considered likely to be harmful if shouting is required in order to com-
municate to a person __________ feet away. - ANSWER 3 feet
The primary role of CAOHC is to advocate for comprehensive programs that promote
_____________ ________________ in occupational hearing conservation. - ANSWER
Best Practices
Which is true about the characteristics of sound called "frequency" (pitch, like piano notes)?
It is measured in _____________. - ANSWER Hertz
What unit of measurement is used for amplitude (intensity) of sound? - ANSWER Deci-
bels
An impulse or impact sound can be described as:
1. an intense sound with __________ duration.
2. a sound that should be _____________ in a noise survey
3. A noise lasting less than ________ second - ANSWER 1. short
2. quantified
3. 1 second
A sound with varying frequency, amplitude, and temporal characteristics best describes a
______________ sound. - ANSWER complex
2
, Temporal characteristics of sound include all except:
A. Continuous
B. Intermittent
C. Steady State
D. Pure Tone - ANSWER Pure Tone
The Permissible Exposure Limit is the limit that should not be _________. The Action Level
(AL) is the trigger for employers to _________________________________________. - AN-
SWER Exceeded ; enroll people in a Hearing Conservation Program
Explain how to determine sound levels when the sound in an area is at 85 dB(A) and another
piece of equipment is added with a sound level of 85 dB(A)... - ANSWER plus 3 dB in-
crease to larger number.
A hearing conservation program should include:
1. __________________ controls to reduce noise levels
2. The use of _______________ ___________________.
3. ________________ _________________ testing - ANSWER 1. engineering
2. hearing protection
3. Annual audiometric
________ measurements are unweighted and therefore referred to as just dB. - ANSWER
Z
_______ weighting is mostly used for measuring impulse sounds like that generated by
weapons. - ANSWER Z
3
SOLUTIONS| GRADED A+| BRAND NEW 2026/2027 UPDATE
Unit of measurement for frequency (pitch) - ANSWER Hertz (Hz) or Kilohertz (kHz)
Time-Weighted Average changes if an employee works longer than _____ hour shifts. - AN-
SWER 8 hour
Time-Weighted Average calculates ________________________ or dB____ and the
________________ of noise exposure. - ANSWER Amplitude ; dB(A) ; duration
According to OSHA, the ACTION LEVEL (AL) at which workers should be included in a hearing
conservation program occurs when they are exposed to a consistent sound level of
___________ dB_____ for an entire ____-hour shift. - ANSWER 85dB(A) ; 8-hour shift
According to OSHA, the permissible exposure limit (PEL) for 8 hours that should not be ex-
ceeded is: - ANSWER 90 dB(A)
Several government agencies, including ______, _________, FRA, and individual state and
local governments, develop and publish noise related regulations requiring compliance by
employers. - ANSWER OSHA ; DoD
If more than one regulation applies to a workplace, be sure to follow the most
_______________ one. - ANSWER Stringent
Regardless of the 8-hour average, impact or impulse noise exposure should never exceed
___________ dB(P) - ANSWER 140 dB(P)
If the 8-hour Time-Weighted Average is 90 dB(A) or above, the Permissible Exposure Limit
has been reached and additional requirements apply. These include:
1
,1. The use of __________ __________ becomes mandatory.
2. Employers must consider feasible ________________ or ________________ controls to
reduce noise exposure.
3. Employers must ensure hearing protection reduces sound levels reaching the ear to below
________ db_____. - ANSWER 1. hearing protection
2. engineering or administrative
3. 90 dB(A)
Noise exposures are considered likely to be harmful if shouting is required in order to com-
municate to a person __________ feet away. - ANSWER 3 feet
The primary role of CAOHC is to advocate for comprehensive programs that promote
_____________ ________________ in occupational hearing conservation. - ANSWER
Best Practices
Which is true about the characteristics of sound called "frequency" (pitch, like piano notes)?
It is measured in _____________. - ANSWER Hertz
What unit of measurement is used for amplitude (intensity) of sound? - ANSWER Deci-
bels
An impulse or impact sound can be described as:
1. an intense sound with __________ duration.
2. a sound that should be _____________ in a noise survey
3. A noise lasting less than ________ second - ANSWER 1. short
2. quantified
3. 1 second
A sound with varying frequency, amplitude, and temporal characteristics best describes a
______________ sound. - ANSWER complex
2
, Temporal characteristics of sound include all except:
A. Continuous
B. Intermittent
C. Steady State
D. Pure Tone - ANSWER Pure Tone
The Permissible Exposure Limit is the limit that should not be _________. The Action Level
(AL) is the trigger for employers to _________________________________________. - AN-
SWER Exceeded ; enroll people in a Hearing Conservation Program
Explain how to determine sound levels when the sound in an area is at 85 dB(A) and another
piece of equipment is added with a sound level of 85 dB(A)... - ANSWER plus 3 dB in-
crease to larger number.
A hearing conservation program should include:
1. __________________ controls to reduce noise levels
2. The use of _______________ ___________________.
3. ________________ _________________ testing - ANSWER 1. engineering
2. hearing protection
3. Annual audiometric
________ measurements are unweighted and therefore referred to as just dB. - ANSWER
Z
_______ weighting is mostly used for measuring impulse sounds like that generated by
weapons. - ANSWER Z
3
