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The material generally used for sound pr...

The material generally used for sound proof- ing of rooms like a recording studio and audi- torium, etc. is

A

Cotton

B

Coir

C

Wood

D

Styro foam

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The correct Answer is:
D
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AAKASH SERIES-ENVIRONMENTAL ISSUES-Exercise-I (Air pollution)
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  2. Use of CNG instead of diesel reduces air pollution because

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  3. Observe the following device. It is used to control

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  4. According to the Central Pollution Control Board, particles that are r...

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  5. Compressed natural Gas (CNG) is

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  6. Among the following which one causes more indoor chemical pollution ?

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  7. Catalytic converters are fitted into automobiles to reduce emission of...

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  8. Why is it necessary to remove sulphur from petroleum products ?

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  9. Montreal Protocol, which calls for appropriate action to protect the o...

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  10. Bhopal gas tragedy of 1984 took place because methyl isocyanate reacte...

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  11. The city in which the entire public road transport runs on CNG

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  12. A major component of gobar gas is

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  13. The loudness of a sound that a person can withstand discomfort is abou...

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  14. The major source of noise pollution, worldwide is due to

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  15. The loudness of a sound that a persin can withstand without discomfort...

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  16. The quietest sound that the ear of a man can detect is known as

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  17. What was added in 1987 as a pollutant to air (Prevention and Control o...

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  18. Sound becomes hazardous noise pollution at level.

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  19. The first effect of noise is

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  20. The material generally used for sound proof- ing of rooms like a recor...

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