CAOHC Practice Exam Questions and Answers

CAOHC Practice Exam




What type of tone is employed in audiometry?



A. Complex

B. Pure

C. Basal

D. Harmonic

E. None of the above - Answer-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 - Answer-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 - Answer-B. False



The method for approximating real world attenuation from an NRR is called "delisting".



A. True

B. False - Answer-B. False



What factors influence the effectiveness of hearing protectors?



A. Temperature

B. Radio frequencies

C. Particles

D. Solvents

E. All of the above - Answer-E. All of the above



Which of the following is a method to verify proper plug insertion?



A. Acoustic check observing noise level change when cupping hands over ear

B. Observing attenuation when tapping gently on the mastoid bone

C. Check the packaging NRR and verify is adequate for sound levels encountered

D. All of the above

E. None of the above - Answer-A. Acoustic check observing noise level change when cupping hands over
ear

, The commonly considered range of normal hearing is from:



A. 0-25 dB

B. 0-35 dB

C. 0-45 dB

D. 25-35 dB

E. 25-45 dB - Answer-A. 0-25 dB



What is the term for temporary hearing loss after noise exposure?



A. Temporary Threshold Shift

B. Transient Inurement

C. Ossicle Dampening Phenomenon

D. Noise-Induced Hearing Lesion

E. Standard Threshold Shift - Answer-A. Temporary Threshold Shift



'Hearing levels' used by audiometers are also known as 'sound pressure levels'.



A. True

B. False - Answer-B. False



Intermittent noise is noise that:



A. Does not end

B. Fluctuates in sound levels with periodic interruptions of relative quiet