Noise Pollution

Q. Noise pollution is measured in

1. Amperes
2. Decibels
3. Fathoms
4. Ohm

Q.

Suggest control measures of noise pollution.

Q.

Human ears can pick up sounds ranging in amplitude (loudness) from $10dB$to $180dB$. A sound is considered to be normal if it is between $50dB$to $60dB$Sounds above $80dB$ are painful and cause various health problems.

Which of the following sounds humans can hear, comfortably?

1. $95dB$

2. $60dB$

3. $100dB$

4. $180dB$

Q.

70-90 dB sound is

1. quiet

2. extremely loud

3. loud

4. scream

Q.

70-90 dB sound is

1. Quiet

2. Very loud

3. Uncomfortable

4. Painful

Q. dB is a standard abbreviation used the quantitative expression of

1. The density of bacteria in a medium
2. A particular pollutant
3. The diminant Bacillus in a culture
4. A certain pesticide

Q.

Assertion: Inhabitants close to very busy airports are likely to experience health hazards.

Reason: Sound level of jet airplanes usually exceeds 160 dB.

1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion

2. Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

3. Assertion is true but Reason is false

4. Both Assertion and Reason are false