CAOHC Exam Prep Questions With Correct Answers

hertz is a unit of: - Answer sound frequency decibel is a unit of: - Answer sound intensity the frequency of sound is perceived as: - Answer pitch what is the first thing you should do when fitting earplugs? - Answer a. pull the top of the ear to align the ear canal b. roll the earplug down into a tight, crease-free cylinder c. CHECK THE EAR CANAL FOR ANY OCCLUSIONS d. insert the earplug deep into the ear canal hearing tests do not have to be conducted in a sound booth as long as maximum allowable ambient noise levels aren't exceeded: - Answer true what type of hearing loss can be attributed to noise? - Answer sensorineural what is the frequency range of speech sounds? - Answer 250-4000 Hz OSHA requires exhaustive calibration if there is a deviation of greater than or equal to 15 dB: - Answer true the range of normal hearing is: - Answer 0-25 dB intermittent noise is noise that: - Answer a. does not end b. FLUCTUATES IN SOUND LEVEL WITH PERIODIC INTERRUPTIONS OF RELATIVE QUIET c. rises continuously d. has been abated through the implementation of engineering controls e. none of the above functional hearing loss is also known as pseudohypacusis: - Answer true conventional earplugs typically reduce high frequency noise more than low-frequency noise: - Answer true OSHA allows retests to be substituted for original tests if done within how many days of the original test? - Answer 30 days administrative controls to limit noise exposure to include: - Answer limiting the time a worker spends at a noise source when a worker's exposure level reaches the "action level", the employer must: - Answer include the worker in a hearing conservation program what components does OSHA require for worker training? - Answer a: effects of noise on hearing b: purpose of hearing protectors c: purpose of hearing testing d: instructions on selecting and fitting protectors e. ALL OF THE ABOVE what is the document that OSHA requires to report hearing loss incidents? - Answer form 300 the missions of CAOHC include: - Answer guiding industry on successful implementation of hearing conservation programs NIHL typically affects: - Answer higher frequencies first what is the term for temporary hearing loss after noise exposure? - Answer temporary threshold shift which of the following is NOT an occupational noise regulatory body? - Answer a. FRA b: MSHA C: CDC d: OSHA e: NIOSH in order to apply age correction to STS calculations, the worker's age and sex are required: - Answer true which of the following is NOT one of NIOSH's "5 Cs of HPDs" to describe the barriers of protective devices: - Answer a. comfort b. CARE c. convenience d. communication e. cost when should a baseline test be performed (ideally)? - Answer a. BEFORE THE WORKER'S SHIFT b. in the middle of the worker's shift c. after the worker's shift the middle ear is the primary site of damage due to hearing loss: - Answer false noise dosimeters are the best tool to measure noise exposure for workers whose exposures vary during their shift: - Answer true in addition to the OSHA requirements, the FRA requires what datum on audiograms? - Answer a. worker gender b. AUDIOMETER MODEL c. examiner CAOHC number d. HCP professional supervisor name e. audiometric room certification date OHC's should suggest likely pathologies for a hearing loss only if asked by subjects: - Answer false which of the following is NOT a common non-occupational source of harmful noise? - Answer a. motorcycles b. carpentry c. guns d. lawn equipment e. NONE OF THE ABOVE which of the following is a disadvantage of foam plugs? - Answer a. doesn't work well with hard hats b. MUST BE INSERTED WITH CLEAN HANDS c. doesn't fit larger ear canals d. must be washed frequency e. all of the above swimmer's ear is an example of mixed hearing loss: - Answer false what factors influence the effectiveness of hearing protectors? - Answer a. temperature b. radio frequencies c. particles d. solvents e. ALL OF THE ABOVE which of the following is a disadvantage of using earmuffs? - Answer a. they come in only one size b. supervisors cannot easily determine if they are being worn properly c. HEADBAND PRESSURE CAN BE UNCOMFORTABLE d. all of the above e. none of the above ambient noise above permissible levels during hearing testing may: - Answer a. increase the number of STS b. alter test thresholds c. distract test subjects d. ALL OF THE ABOVE e. none of the above if a worker fails to respond to soft tones, whisper audiometry should be employed: - Answer false only workers exposed to the permissible exposure limit need to be included in hearing conservation programs: - Answer false OHC's should alert the professional supervisor to problem audiograms: - Answer true which is the following is NOT a medical condition of the outer ear? - Answer a. wax impaction b. collapsed ear canal c. external otitis d. all of the above e. NONE OF THE ABOVE which of the following is NOT information to collect for an aural history? - Answer a. occurrence of measles b. MARIJUANA USE c. occurrence of chronic ear infection d. motorcycle use e. military service during audiometry, the workers should be seated so they may see the OHC's activities: - Answer false OSHA's 1910.95 regulation requires written notification of a Standard Threshold Shift within how many days? - Answer 21 days acoustic neuromas can manifest as an asymmetric or unilateral hearing loss: - Answer true what is the proper order of steps when inserting foam earplugs? - Answer 1. prepare earplug 2. open ear canal 3. insert earplug if daily calibration threshold is off by more than 5 dB, the audiometer must be acoustically calibrated: - Answer true pre-molded earplugs are designed to be worn only once: - Answer false flat hearing loss can be caused by which of the following? - Answer a. equipment malfunction b. worker response error c. intentionally not responding to tones to simulate a loss d. conductive pathology e. ALL OF THE ABOVE