Unit 3a - Hearing Conservation
10 Questions
| Attempts: 451
Unit 3a - Hearing Conservation
Questions and Answers
- 1.
Which of the following earplugs are being worn correctly?A. B. C.- A.
A
- B.
B
- C.
C
- D.
All are correct
- 2.
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?
- A.
Yes
- B.
No
- 3.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?
- A.
Yes
- B.
No
- 4.Noise Induced Hearing Loss (NIHL) can be permanent.
- A.
TRUE
- B.
FALSE
- 5.With no hearing protection, how many consecutive hours can you work in a noise level of 90dB?
- A.
8
- B.
6
- C.
4
- D.
3
- 6.How can you tell if a noise level is too great?
- A.
The noise hurts your ears
- B.
You must shout over a short distance to be heard
- C.
You have difficulting hearing a few hours after exposure to the noise
- D.
All of the above
- 7.The intesity of noise is measured in:
- A.
Amplitude
- B.
Frequency
- C.
Decibels
- D.
Wavelength
- 8.The Threshold (or Upper Limit) for what is considered a hazardous noise level is:
- A.
80dB
- B.
85dB
- C.
90dB
- D.
95dB
- 9.
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).
- A.
Increased
- B.
Decreased
- C.
Had no effect
- D.
Cancelled out
- 10.
WITHOUT hearing protection, how long can a concrete chipping operation rated at 97 decibels continue before you are overexposed?
- A.
2 hours
- B.
3 hours
- C.
4 hours
- D.
5 hours
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