Hearing conservation certification
Exam Questions with Correct Verified
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A decibel (dB) is the unit of measurement for:
a. Frequency
b. Intensity
c. Duration
d. Weighting - ANS ✓B
Range of human hearing at birth:
a. 20 Hz to 8,000 Hz
b. 250 Hz to 10,000 Hz
c. 20 Hz to 20,000 Hz
d. 500 Hz to 8,000 Hz - ANS ✓C
Adding together two identical noise sources of 100 dBA each will result in a
total of:
a. 200 dBA
b. 103 dBA
c. 105 dBA
d. 106 dBA - ANS ✓B
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The range of intensity (from just audible to discomfort) for human hearing
is:
a. 0 dB - 100 dB
b. 0 dB - 85 dB
c. 0 dB - 140 dB
d. 0 dB - 90 dB - ANS ✓C
.The relationship between _______ and ________ is what determines the risk of
noise-induced hearing loss:
a. intensity; frequency
b. duration; intensity
c. duration; frequency
d. intensity; weighting - ANS ✓B
The ___ weighting network resembles how the human ear responds to sound
and is used in HCPs to determine risk:
a. A
b. B
c. C
d. Z - ANS ✓A
Steady-state or continuous noise has a duration of:
a. At least 5 seconds
b. .5 second or longer
c. 1 second or longer
d. At least 10 seconds - ANS ✓C
Time-weighted average is based on:
a. No defined period of time
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b. 8 hours
c. 10 hours
d. 40 hours - ANS ✓B
Per OSHA, the Action Level is ____ dBA TWA and the Permissible Exposure
Limit is ____ dBA TWA.
a. 90; 85
b. 85; 85
c. 85; 90
d. 90; 90 - ANS ✓C
At the Action Level the requirements for enrolled employees are annual
hearing testing and education, hearing protection made available, and
________________________.
a. engineering controls must be considered
b. hearing protection must be worn by those who have incurred an STS
c. fit testing of hearing protection must be done
d. dosimetry must be conducted on every enrolled employee - ANS ✓B
The _________ is team member most likely to conduct noise measurements.
a. safety manager
b. professional supervisor
c. industrial hygienist
d. COHC - ANS ✓C
Instrument that captures noise levels at a point in time:
a. Dosimeter
b. Sound level meter
c. Audiometer
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d. Oscilloscope - ANS ✓B
When employees are mobile and/or have varying exposures over a
workday, the recommended instrument for noise measurement is:
a. Sound level meter
b. Audiometer
c. Oscilloscope
d. Dosimeter - ANS ✓D
A subjective rule for determining if your environment is potentially
hazardous is the:
a. Inverse square rule
b. 3-foot rule
c. 10-foot rule
d. Acoustic doubling rule - ANS ✓B
OSHA recommends a Type ___ microphone for noise measurement
instruments.
a. A
b. 1
c. 2
d. Z - ANS ✓C
The ___________ is professional most qualified to recommend engineering
controls.
a. safety manager
b. industrial hygienist
c. acoustical/noise control engineer
d. professional supervisor - ANS ✓C
Hearing conservation certification
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