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10.7: Review Questions

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    Multiple Choice Questions

    1. Which of the following statements about noise-induced hearing loss is correct?
    (a) It can always be corrected with surgery
    (b) Hearing aids restore normal hearing after noise exposure
    (c) It can be prevented but cannot be cured once it occurs
    (d) It is always caused by one-time exposure to explosions

    2. OSHA’s permissible exposure limit (PEL) for workplace noise is:
    (a) 70 dBA for 8 hours
    (b) 85 dBA for 8 hours
    (c) 90 dBA for 8 hours
    (d) 100 dBA for 8 hours

    3. Which part of the ear contains the cochlea with tiny hair cells that convert sound waves into nerve impulse?
    (a) Outer ear
    (b) Middle ear
    (c) Inner ear
    (d) Eardrum

    4. Which of the following is an engineering control for reducing workplace noise?
    (a) Scheduling noisy tasks during shifts with fewer workers
    (b) Using quieter tools and machinery
    (c) Limiting worker time near noise sources
    (d) Providing quiet rooms for workers

    5. Which of the following indicates your workplace might be too noisy?
    (a) You hear muffled or distorted speech sounds
    (b) You hear ringing in your ears after leaving work
    (c) You have to shout to be heard at arm’s length
    (d) All of the above

    6. The “2-to-3 Foot Rule” for workplace noise means:
    (a) If you can hear a coworker whisper 2-3 feet away, noise levels are safe.
    (b) If you must raise your voice to be heard 2-3 feet away, noise is at or above 85 dBA.
    (c) You should always stand 2-3 feet away from noisy machinery
    (d) Earplugs should be worn if workers are 2-3 feet from a noise source

    7. Which type of hearing protection usually offers the most noise reduction?
    (a) Plain cotton
    (b) Earmuffs and foam earplugs
    (c) Portable music player headphones
    (d) Hearing aids

    8. Which of the following is not a required element of an effective hearing conservation program?
    (a) Annual worker training on noise hazards
    (b) Worker audiometric testing (hearing tests)
    (c) Provision of hearing protection devices at no cost
    (d) Guaranteeing that workers never work in noisy environments

    9. What is the primary factor determining the extent of hearing damage from noise exposure?
    (a) The worker’s age and gender
    (b) The pitch of the noise only
    (c) The intensity and duration of exposure
    (d) The type of hearing protection worn

    10. Which of the following is an example of administrative control to limit noise exposure?
    (a) Installing mufflers on loud machines
    (b) Scheduling noisy tasks when fewer workers are present
    (c) Building soundproof barriers around generators
    (d) Lubricating equipment parts

    11. Which of the following best describes tinnitus?
    (a) Sudden loss of hearing due to infection
    (b) A constant ringing or buzzing in the ears
    (c) The ability to hear high-pitched sounds only
    (d) Pain in the middle ear due to pressure changes

    12. Which of the following is part of the “Reduce It – Move It – Block It” noise control process?
    (a) Ignoring low-level background noise
    (b) Moving noisy equipment farther from workers
    (c) Reducing the number of workers on site
    (d) Wearing hearing aids to block background noise


    True/False Questions

    13. True/False: Noise-induced hearing loss is gradual, painless, and often unnoticed until it is too late.
    14. True/False: A 3 dBA increase in noise doubles the amount of noise and halves safe exposure time.
    15. True/False: Hearing aids are effective substitutes for hearing protection devices.
    16. True/False: Proper maintenance of equipment (e.g., lubrication, sharp blades, mufflers) can help reduce workplace noise levels.
    17. True/False: Noise-induced hearing loss can always be reversed with proper medical treatment.
    18. True/False: Exposure to a single sudden loud noise, like an explosion, can cause instant permanent hearing damage.
    19. True/False: Plain cotton is considered an acceptable form of hearing protection.
    20. True/False: Noise is considered any unwanted sound that may cause harm or interfere with normal activity.
    21. True/False: Temporary hearing loss from loud noise will always lead to permanent hearing damage.

    Answer Key: 1) c, 2) c, 3) c, 4) b, 5) d, 6) b, 7) b, 8) d, 9) c, 10) b, 11) b, 12) b, 13) True, 14) True, 15) False, 16) True, 17) False, 18) True, 19) False, 20) True, 21) False.

    This page titled 10.7: Review Questions was last modified on Fri, 14 Aug 2026 17:00:16 GMT and is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Jenny Huang.