caohc_exam_prep_questions_with_complete_solutions

1. hertz is a unit of:: sound frequency 2. decibel is a unit of:: sound intensity 3. the frequency of sound is perceived as::  pitch 4. what is the first thing you should do when fitting earplugs?: a. pull the top ofthe 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 5. hearing tests do not have to be conducted in a sound booth as long as maximum allowable ambient noise levels aren't exceeded:: true 6. what type of hearing loss can be attributed to noise?: sensorineural 7. what is the frequency range of speech sounds?: 250-4000 Hz 8. OSHA requires exhaustive calibration if there is a deviation of greater than or equal to 15 dB:: true 9. the range of normal hearing is:: 0-25 dB 10. intermittent noise is noise that:: a. does not end b. FLUCTUATES IN SOUND LEVEL WITH PERIODIC INTERRUPTIONS OF REL- 2 / 14 ATIVE QUIET c. rises continuously d. has been abated through the implementation of engineering controls e. none of the above 11. functional hearing loss is also known as pseudohypacusis:: true 12. conventional earplugs typically reduce high frequency noise more than low-frequency noise:: true 13. OSHA allows retests to be substituted for original tests if done within how many days of the original test?: 30 days 14. administrative controls to limit noise exposure to include:: limiting the time a worker spends at a noise source 15. when a worker's exposure level reaches the "action level", the employer must:: include the worker in a hearing conservation program 16. what components does OSHA require for worker training?: 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 3 / 14 17. what is the document that OSHA requires to report hearing loss incidents?: form 300 4 / 14 18. the missions of CAOHC include:: guiding industry on successful implementation of hearing conservation programs 19. NIHL typically affects:: higher frequencies first 20. what is the term for temporary hearing loss after noise exposure?: temporary threshold shift 21. which of the following is NOT an occupational noise regulatory body?: a. FRA b: MSHA C: CDC d: OSHA e: NIOSH 22. in order to apply age correction to STS calculations, the worker's age and sex are required:: true 23. which of the following is NOT one of NIOSH's "5 Cs of HPDs" to describe the barriers of protective devices:: a. comfort b. CARE c. convenience d. communication e. cost 5 / 14 24. when should a baseline test be performed (ideally)?: a. BEFORE THE WORKER'S SHIFT b. in the middle of the worker's shift c. after the worker's shift 25. the middle ear is the primary site of damage due to hearing loss:: false 26. noise dosimeters are the best tool to measure noise exposure for workers whose exposures vary during their shift:: true