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CAOHC PRACTICE EXAM QUESTIONS & ANSWERS
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CAOHC PRACTICE EXAM QUESTIONS & ANSWERS
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CAOHC PRACTICE EXAM QUESTIONS & ANSWERSWhat type of tone is employed in audiometry?
A. Complex
B. Pure
C. Basal
D. Harmonic
E. None of the above - Answers- B. Pure
What factors should be considered when selecting hearing protectors
A. Comfort
B. Ease of use
C. Attenuation amount
D. Communication requirements
E. All of the above - Answers- E. All of the above
When determining a threshold, a positive response should be followed by lowering the
hearing level 5 dB.
A. True
B. False - Answers- B. False
The method for approximating real world attenuation from an NRR is called "delisting".
A. True
B. False - Answers- B. False
What factors influence the effectiveness of hearing protectors?
A. Temperature
B. Radio frequencies
C. Particles
D. Solvents
E. All of the above - Answers- E. All of the above
OHCs using a microprocessor audiometer never need to understand how to calculate
an STS.
A. True
B. False - Answers- B. False
What is OSHA's exchange rate?
A. 85 Hertz
, B. 90 Hertz
C. 5 dB
D. 10 dB
E. 10 nanometers - Answers- C. 5 dB
Asymmetric hearing loss is when loss in both ears in approximately equal.
A. True
B. False - Answers- B. False
Which of the following is true if an 8-hour TWA?
A. It must be computed during an 8-hour workday
B. It only applies to workers who normally work 8 hour shifts
C. It's a single value representing the combination of all noise exposures over a
workday
D. It is unrelated to a noise dose
E. None of the above - Answers- C. It's a single value representing the combination of
all noise exposures over a workday
In order to apply age correction to STS calculations the worker's sex and age are
required.
A. True
B. False - Answers- A. True
During audiometry, workers should be seated so they may see the OHC's activities.
A. True
B. False - Answers- B. False
What is the frequency range of speech sounds?
A. 0-20 Hz
B. 250-4000 Hz
C. 2000-6000 Hz
D. 2000-8000 Hz
E. 2000-20,000 Hz - Answers- B. 250-4000 Hz
Which of the following is a reason why age correction is prohibited by the DoD?
A. OSHA age correction tables were drawn from a small population
B. Presbycusis varies from person to person
C. Age correction can delay identification of hearing loss
D. All of the above
E. None of the above - Answers- D. All of the above
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