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Question

Which of the following are sources of noise pollution?

A
Crackers
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B
Silencers
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C
Heavy machines
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D
Loud speakers
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Solution

The correct options are
A Crackers
C Heavy machines
D Loud speakers
Noise is unwanted sound which is unpleasant to ears. Following are some of the sources of noise pollution:
  • Loud speakers
  • Crackers
  • Traffic
  • Heavy machines
Silencers are devices used to control noise pollution by reducing sound intensity.

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