Home
Class 12
BIOLOGY
Assertion : Inhabitants close to busy...

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

A

If the both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true and the reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false statements.

Text Solution

Verified by Experts

The correct Answer is:
B

Inhabitants close to very busy airports are likely to experience health hazards. Because maximum acceptable range of sound is 80-90 dB. But in the places like airports this level is always exceeds thus it creates sound pollution and related health hazards like auditory fatigue, deafness etc. Jet planes generally produce sound above 160 dB which is much more than normal level, thus they also produce sound pollution. But as jet aeroplanes are used for some special purposes, they normally do not land in common (very busy) airports ( without emergency). Thus it has no direct relation in causing sound pollution and related hazards in area nearby very busy airports.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Sound level increases linearly with intensity of sound. Reason : If intensity of sound is doubled, sound level increases approximatel 3 dB .

Assertion : Sound level increases linearly with intensity of sound. Reason : If intensity of sound is doubled, sound level increases approximatel 3 dB .

Assertion : In the experiment of finding speed of sound by resonance tube method, as the level of water is lowered, wavelength increases. Reason : By lowering the water level number of loops increases.

Assertion : A brief expoosure to extremely high sound level, 150dB or more generated by take off of a jet plane or rocket, may damage ear drum or dislocate ear ossicles and permanently impair the hearing ability. Reason : In India, the Air (Prevention and Control of Pollution ) Act came into force in 1981, but was amended in 1987 to include noise as an air pollutant.

John works as a ground staff at a military airport . While monitoring the test flight of a jet plane , he accidentally stand too close the engine and the loud noise renders him deaf. This permanent damage to his hearing is possible when the sound level is