Noise Pollution

Q.

Db is a standard abbreviation used for the quantitative expression of ?

1. The density of bacteria in a medium.

2. The dominant Bacillus in a culture.

3. A certain pesticide

4. A particular pollutant

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. Considering the many dangerous effects of noise pollution, can you identify the unnecessary sources of noise pollution around you which can be reduced immediately without any financial loss to anybody?

Q.

70-90 dB sound is

1. Uncomfortable

2. painful

3. Quiet

4. Very Loud

Q. The degree of hearing loss due to noise pollution depends on which of the following?

I. Intensity of the sound
II. Duration of the noise
III. Amplitude of the sound

1. I only
2. II only
3. I and II only
4. I, II and III

Q. Write any three ways by which noise pollution affects the human body adversely. List any three steps that should be followed in order to reduce noise pollution. [3 Marks]

Q.

At which noise level the physical discomfort starts?

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Inhabitants close to very busy airports are likely to experience health hazards.
Reason [R]: Sound levels of jet planes usually exceed 150 dB.

1. Both assertion and reason are false
2. Both assertion and reason are true and the reason is the correct explanation for assertion
3. Assertion is true but reason is false
4. Both assertion and reason are true but the reason is not the correct explanation for the assertion

Q. Name the unit to measure noise pollution?

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: Inhabitants close to busy airports are likely to experience health hazards.
Reason [R]: Sound levels of jet planes usually exceed 150 dB.

1. Both A and R are correct and R explains A
2. A is correct but R is incorrect
3. Both A and R are incorrect
4. Both A and R are correct but R does not explain A

Q. Decibel (db) is used for the quantitative expression of

1. the density of bacteria in a medium
2. intensity of noise
3. the dominant Bacillus in a culture
4. a ceratin pesticide

Q. _________ db is the threshold of hearing the faintest sound most of us can hear.

1. $0$
2. $1$
3. $2$
4. None of the above

Q. Let the door be closed change the voice.

Q. Regarding the assertion and reason, choose the correct option.
Assertion [A]: Inhabitants close to busy airports are likely to experience health hazards.
Reason [R]: Sound levels of jet planes usually exceed 150 dB.

1. Both A and R are correct and R explains A
2. Both A and R are correct but R does not explain A
3. A is correct but R is incorrect
4. Both A and R are incorrect

Q. Assertion :Inhabitants close to busy airports are likely to experience health hazards. Reason: Sound levels of jet aeroplanes usually exceed 160 dB.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not the correct explanation of A
3. A is true but R is false
4. Both A and R are false

Q.

70-90 dB sound is

1. extremely loud

2. scream

3. quiet

4. loud

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

Q. Explain any four causes of noise pollution.

Q. Assertion :Hearing aids help the hearing impaired to hear. Reason: The male sound travel through skull bones.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
   
   
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Noise pollution is measured in

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

Q.

The loudness of sound that a person can withstand without discomfort is

1. 150 dB

2. 215 dB

3. 30 dB

4. ​​​​​​80 dB

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. Noise pollution is measured in

1. Sweden

2. Brazil

3. South Africa

4. Argentina

Q.

The loudness of sound that a person can withstand without discomfort is

1. 150 dB

2. 215 dB

3. 30 dB

4. ​​​​​​80 dB

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

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

Q. With regard to the assertion and reason, choose the correct option:
Assertion [A]: Inhabitants close to very busy airports are likely to experience health hazards.
Reason [R]: Sound levels of jet planes usually exceed 150 dB.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. Both A and R are false

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. Loudspeakers or public system should not be used in night between

1. None of the above
2. 10 am to 6 pm
3. 10 pm to 6 am
4. 5 pm to 10 pm