OHC Exam || All Answers are Valid
What is the term for industrial agents that are poisonous to the ear? correct answers ototoxins
Unit of measure for sound pressure correct answers micro pascals
3 examples of auditory effects of noise correct answers tinnitus, hyperacusis, TTS
Where does maximum shift occur for a temporary threshold shift? correct answers 1/2 to 1
octave greater than the frequency of the noise exposure
Permissible Exposure Limit per OSHA correct answers 90 dBA
Per OSHA, how much time could a worker be exposed to 95 dBA before reaching 100% of their
noise dose? correct answers 4 hours
dB weighting scale most closely correlated with NIHL correct answers A-weighted
Who is most qualified to make noise measurements? correct answers noise control engineer
What is the threshold for noise exposure per OSHA? (below what level can workers be exposed
indefinitely) correct answers 80 dBA
Exchange rate for OSHA? correct answers 5 dBA
Exchange rate for NIOSH? correct answers 3 dBA
, Allowable noise levels for annoyance per the EPA are ______ dBA for daytime and ______ dB A
for nightime correct answers 55, 45
T/F: Workers with documented hearing loss should wear their hearing aids during audiometric
monitoring correct answers False
T/F: Occupational NIHL is viewed as an on the job injury? correct answers False
T/F: Sound travels faster through air than through water correct answers False
T/F: Eardrums reposed to sound pressure not sound power correct answers True
T/F: Standards may incorporate regulations to describe or clarify requirements correct answers
False
T/F: OHCs are not required to allow workers or worker's representatives to witness noise
measurments correct answers False
T/F: Noise monitoring must be repeated if changes in production, procedures, equipment or
controls change the noise levels. correct answers True
T/F: NIOSH considers economic impact when making recommendations correct answers False
T/F: If a company is bought out, the old employer does not need to transfer hearing records to
the new employer correct answers False
T/F: According to OSHA, once an audiometric test booth is certified it does not need to be
certified again unless it is moved or changes occur in the surrounding area that might affect noise
levels. correct answers True
What is the term for industrial agents that are poisonous to the ear? correct answers ototoxins
Unit of measure for sound pressure correct answers micro pascals
3 examples of auditory effects of noise correct answers tinnitus, hyperacusis, TTS
Where does maximum shift occur for a temporary threshold shift? correct answers 1/2 to 1
octave greater than the frequency of the noise exposure
Permissible Exposure Limit per OSHA correct answers 90 dBA
Per OSHA, how much time could a worker be exposed to 95 dBA before reaching 100% of their
noise dose? correct answers 4 hours
dB weighting scale most closely correlated with NIHL correct answers A-weighted
Who is most qualified to make noise measurements? correct answers noise control engineer
What is the threshold for noise exposure per OSHA? (below what level can workers be exposed
indefinitely) correct answers 80 dBA
Exchange rate for OSHA? correct answers 5 dBA
Exchange rate for NIOSH? correct answers 3 dBA
, Allowable noise levels for annoyance per the EPA are ______ dBA for daytime and ______ dB A
for nightime correct answers 55, 45
T/F: Workers with documented hearing loss should wear their hearing aids during audiometric
monitoring correct answers False
T/F: Occupational NIHL is viewed as an on the job injury? correct answers False
T/F: Sound travels faster through air than through water correct answers False
T/F: Eardrums reposed to sound pressure not sound power correct answers True
T/F: Standards may incorporate regulations to describe or clarify requirements correct answers
False
T/F: OHCs are not required to allow workers or worker's representatives to witness noise
measurments correct answers False
T/F: Noise monitoring must be repeated if changes in production, procedures, equipment or
controls change the noise levels. correct answers True
T/F: NIOSH considers economic impact when making recommendations correct answers False
T/F: If a company is bought out, the old employer does not need to transfer hearing records to
the new employer correct answers False
T/F: According to OSHA, once an audiometric test booth is certified it does not need to be
certified again unless it is moved or changes occur in the surrounding area that might affect noise
levels. correct answers True
