Unit 3a - Hearing Conservation

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  • 1/10 Questions
    You have been using an impact wrench for 6 straight hours with no hearing protection. The impact wrench creates a noise level of 108dB. Have you been overexposed? - ProProfs

    You have been using an impact wrench for 6 straight hours with no hearing protection. The impact wrench creates a noise level of 108dB. Have you been overexposed?

    • Yes
    • No
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About This Quiz

This quiz covers essential aspects of hearing conservation in the workplace, focusing on correct earplug use, exposure limits, and the permanence of noise-induced hearing loss.

Unit 3a - Hearing Conservation - Quiz

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  • 2. 

    Noise Induced Hearing Loss (NIHL) can be permanent.

    • TRUE

    • FALSE

    Correct Answer
    A. TRUE
    Explanation
    NIHL can be permanent depending on many factors, such as length of time exposed to the noise, intensity of the noise, and personal factors.

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  • 3. 

    How can you tell if a noise level is too great?

    • The noise hurts your ears

    • You must shout over a short distance to be heard

    • You have difficulting hearing a few hours after exposure to the noise

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    All of the above options indicate that the noise level is too great. If the noise hurts your ears, it suggests that the noise is too loud and can potentially cause damage to your hearing. Similarly, if you have to shout over a short distance to be heard, it indicates that the noise level is too high for normal conversation. Additionally, if you experience difficulty in hearing for a few hours after being exposed to the noise, it implies that the noise level was excessive and affected your hearing temporarily. Therefore, all of these signs collectively suggest that the noise level is too great.

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  • 4. 

    You are working in a noise level of 92dB, but ARE wearing ear plugs with a Noise Reduction Rating (NRR) of 23dB. Can you work for 8 hours in this environment?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    Yes, you can work for 8 hours in this environment. The noise level is 92dB, but you are wearing ear plugs with a Noise Reduction Rating (NRR) of 23dB. The NRR indicates the amount of noise that the ear plugs can block out. By wearing the ear plugs, the effective noise level that reaches your ears is reduced by 23dB. Therefore, the actual noise level you are exposed to is 69dB (92dB - 23dB). This level is within the acceptable range for prolonged exposure, so you can work for 8 hours without any adverse effects.

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  • 5. 

    The intesity of noise is measured in:

    • Amplitude

    • Frequency

    • Decibels

    • Wavelength

    Correct Answer
    A. Decibels
    Explanation
    The intensity of noise is measured in decibels. Decibels is a unit used to quantify the level of sound or noise. It is a logarithmic scale that measures the ratio of the sound pressure level to a reference level. This scale allows for the measurement of a wide range of sound intensities, from the faintest sounds to extremely loud ones. The higher the decibel level, the louder the noise. Therefore, decibels are the appropriate unit of measurement for noise intensity.

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  • 6. 
    Which of the following earplugs are being worn correctly?A.           B.            C. - ProProfs

    Which of the following earplugs are being worn correctly?A.           B.            C.

    • A

    • B

    • C

    • All are correct

    Correct Answer
    A. C
    Explanation
    Photo C demonstrates the correct way to wear your ear plugs. Not having the ear plug inserted correctly will decrease its Noise Reduction Rating and ability to protect your hearing.

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  • 7. 
    You are mowing your yard and use your IPod/headphones to drown out the noise. You have ______ your risk of Noise Induced Hearing Loss (NIHL). - ProProfs

    You are mowing your yard and use your IPod/headphones to drown out the noise. You have ______ your risk of Noise Induced Hearing Loss (NIHL).

    • Increased

    • Decreased

    • Had no effect

    • Cancelled out

    Correct Answer
    A. Increased
    Explanation
    By playing your music loud enough to drown out the noise of the lawn mower, you have increased your risk of NIHL by adding to the sound of the mower.

    Music Headphones are never effective as hearing protection.

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  • 8. 

    The Threshold (or Upper Limit) for what is considered a hazardous noise level is:

    • 80dB

    • 85dB

    • 90dB

    • 95dB

    Correct Answer
    A. 85dB
    Explanation
    The correct answer is 85dB. This is the threshold for what is considered a hazardous noise level. Noise levels above 85dB can cause damage to the hearing if exposed to for long periods of time. It is important to take measures to protect oneself from excessive noise exposure in order to prevent hearing loss.

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  • 9. 

    With no hearing protection, how many consecutive hours can you work in a noise level of 90dB?

    • 8

    • 6

    • 4

    • 3

    Correct Answer
    A. 8
    Explanation
    Without hearing protection, it is safe to work in a noise level of 90dB for a maximum of 8 consecutive hours. This is because prolonged exposure to high noise levels can cause damage to the ears and lead to hearing loss. Therefore, it is important to limit exposure to loud noises and use hearing protection when necessary.

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  • 10. 
    WITHOUT hearing protection, how long can a concrete chipping operation rated at 97 decibels continue before you are overexposed? - ProProfs

    WITHOUT hearing protection, how long can a concrete chipping operation rated at 97 decibels continue before you are overexposed?

    • 2 hours

    • 3 hours

    • 4 hours

    • 5 hours

    Correct Answer
    A. 3 hours
    Explanation
    The correct answer is 3 hours because the question asks about the duration of a concrete chipping operation rated at 97 decibels before overexposure occurs. Without hearing protection, prolonged exposure to high decibel levels can lead to hearing damage. The duration of 3 hours indicates that after this time, the individual would be at risk of overexposure and potential hearing damage.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 03, 2008
    Quiz Created by
    Kiewit
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