CAOHC Hearing conservation certification Exam Questions With Correct Answers

CAOHC's primary objective is to: a. Promote hearing loss prevention by enhancing the quality of occupational hearing conservation practices b. Provide input to legislative action regarding occupational hearing program implementation c. Train council members in occupational hearing program implementation d. Train audiologists in occupational hearing program implementation - Answer A A COHC is NOT able to train other OHCs to do manual testing, to be a Professional Supervisor, or ____________________. a. select, fit, and instruct on hearing protection devices b. perform automated air conduction pure tone testing c. diagnose hearing problems or interpret audiograms d. counsel individuals about their hearing test results - Answer C The sector with the highest incidence of occupational hearing loss: a. Transportation b. Construction c. Manufacturing d. Military - Answer C Auditory effects of noise exposure include noise-induced hearing loss, hyperacusis, and _____________. a. tinnitus b. stress c. depression d. hypertension - Answer A Noise-induced hearing loss typically occurs initially at: a. 1000 Hz b. 3000 Hz c. 4000 Hz d. 8000 Hz - Answer C Early signs/symptoms of a noise-induced hearing loss include tinnitus, difficulty understanding in background noise, and _________________. a. vertigo/unsteadiness b. need for visual cues c. ear pain d. ear discharge - Answer B 7. Typical characteristics of a noise-induced hearing loss include a notch at 4000 Hz, variable susceptibility among individuals, and _________________________. a. bilateral and symmetrical b. bilateral and asymmetrical c. Unilateral d. Loss not greater than 50 dBHL - Answer A The 3 tiny bones in the middle ear collectively form the _________________. a. eustachian tube b. tympanic cavity c. ossicular chain d. organ of corti - Answer C The bones of the middle ear (in order from eardrum to oval window) are the: a. Maxilla, incus, stapes b. Malleus, incus, stapes c. Stapes, incus, malleus d. Stapes, incus, maxilla - Answer A The primary function of the outer ear is to: a. Collect sound waves and channel them down the ear canal b. Transmit electrical impulses to the brain c. Equalize pressure in the tympanic cavity d. Transform sound waves into vibrations - Answer A Type of hearing loss that results from cerumen impaction: a. Sensorineural b. Mixed c. Conductive d. No hearing loss - Answer C Hearing loss due to aging: a. Noise-induced b. Presbycusis c. Otosclerosis d. Otitis Externa - Answer B Part of ear damaged by hazardous noise exposure: a. Organ of corti (cochlea) b. Tympanic membrane c. Ossicular chain d. Semi-circular canals - Answer A Frequency is perceived as pitch, is measured in Hertz (Hz), and ________________________________. a. is a significant factor for risk of developing hearing loss b. low frequencies are easily stopped by a barrier c. more cycles per second indicate a high frequency sound d. more cycles per second indicate a low frequency sound - Answer C A decibel (dB) is the unit of measurement for: a. Frequency b. Intensity c. Duration d. Weighting - Answer 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 - Answer 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 - Answer B 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 - Answer 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 - Answer 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 - Answer 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 - Answer C Time-weighted average is based on: a. No defined period of time b. 8 hours c. 10 hours d. 40 hours - Answer 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 - Answer 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 - Answer B The _________ is team member most likely to conduct noise measurements. a. safety manager b. professional supervisor c. industrial hygienist d. COHC - Answer C Instrument that captures noise levels at a point in time: a. Dosimeter b. Sound level meter c. Audiometer d. Oscilloscope - Answer 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 - Answer 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 - Answer B OSHA recommends a Type ___ microphone for noise measurement instruments. a. A b. 1 c. 2 d. Z - Answer C The ___________ is professional most qualified to recommend engineering controls. a. safety manager b. industrial hygienist c. acoustical/noise control engineer d. professional supervisor - Answer C Noise can be controlled at the _______, _______ and ___________. a. source; path; receiver b. entrance; path; receiver c. beginning; path; ending d. source; equipment; receiver - Answer A OSHA requires that training include purpose of testing, explanation of test procedures, the effects of noise on hearing, and _______________________. a. what engineering and administrative controls are in the workplace b. all topics related to selection, fit, maintenance of hearing protection c. noise measurements d. how the ear hears - Answer B The following is most effective method for delivering training/education: a. Videos b. One on one training c. Computerized training d. Large group training - Answer B Training should be ______________. a. punitive b. detailed c. motivating d. comprehensive - Answer C A professional supervisor's role will typically include oversight of the audiometric testing program, review of problem audiograms, and _________________. a. annual training of employees b. noise control implementation c. noise hazard assessment d. determining work-relatedness of hearing loss - Answer D The following element of a HCP is what makes it a 'model' program: a. Audiometric testing b. Education/training c. Engineering/administrative controls d. Analysis of program effectiveness - Answer D The definition of an OSHA STS is: a. 10 dB shift at any frequency from Hz in either or both ears b. 10 dB average shift at 2000, 3000 and 4000 Hz in either or both ears c. 25 dB average shift at 2000, 3000 and 4000 Hz in either or both ears d. 10 dB average shift at 3000, 4000 and 6000 Hz in either or both ears - Answer B . An OSHA-recordable STS must be determined to be work related, have an average 10 dB shift at 2000, 3000, and 4000 Hz in either or both ears, and also a ___________________________. a. 25 dB or worse average hearing level on current audio at 2000, 3000 and 4000 Hz in either ear. b. 25 dB or worse average hearing level on current audio at 2000, 3000 and 4000 Hz in the same ear. c. 25 dB or worse hearing level on current audio at any frequency from Hz in either or both ears d. 25 dB or worse hearing level on current audio at any frequency from Hz in the same ear - Answer B