Noise Pollution (Class IX)
Questions about noise pollution, its effects on health, characteristics of sound, and measures to control it.
Questions
Which of the following ailments are not caused by noise pollution?
- Hypertension and deafness
- Hypertension and irritation
- Irritation and deafness
- Vomiting and typhoid
- Hypertension and heart problems
Which of the following measures is not useful in checking noise pollution?
- Restriction on loud speakers
- Planting trees by the roadside
- Prohibiting<font size="2"> the</font> burning of fire crackers
- <font size="2">Restriction on</font> watching TV or listening to radio inside houses
Which of the following is not considered as noise pollution?
- Sound of crackers
- Air horn in vehicles
- An explosion in a mine
- A sitar concert by a maestro
- A loud speaker
What level of noise is considered permissible in human habitats?
- Up to 50 decibels
- Less than 40 decibels
- Up to 30 decibels
- Less than 20 decibels
Which of the following is not a characteristic of a musical sound?
- Pitch
- Wavelength
- Quality
- Loudness
The quality of a musical note does not depend on
- amplitude of the wave
- relative intensities of harmonies
- number of harmonics
- order of harmonics present
Which of the following health-related problems may be caused on exposure to excessive noise in the surroundings?
- Lack of sleep
- Anxiety
- Hypertension
- All of the above
There are 3 sound sources producing sounds of 20 dB, 40 dB and 80 dB. Which sound will we hear the loudest?
- 20 dB
- 40 dB
- 80 dB
- All the 3 sounds will be equally loud.
Which of the following sounds do(es) not result in noise pollution?
- Horns of buses and trucks
- Sound produced by a running genset
- Sound produced by the vibrating string of a sitar
- Sound of students speaking together in a classroom
Which of the following is not a harmful effect of noise pollution?
- Hypertension
- Anxiety
- Deafness
- Asthma
- Insomnia
Noise pollution may cause
- hearing impairment
- skin disease
- mental disorder
- intestinal disease
Which of the following is/are the measure(s) to control noise pollution?
- Plantation of trees along the roads and around buildings
- Minimising the use of automobile horns
- Installation of silencing devices in aircraft engines and transport vehicles
- All of the above
All of the following are methods of controlling noise pollution, except
- killing plants and destroying animal tissues
- proper lubrication and better maintenance of machines
- acoustic zoning or restricting the noisy industries away from dwelling areas
- restriction on loud speakers by most of the big cities
- adoption of legislative measures to keep down sound pollution from particular sources
Which of the following statements is/are true?
(a) Noise pollution can cause partial hearing impairment.
(b) Air conditioners do not contribute to noise pollution.
(c) Presence of excessive sound in environment is termed as noise pollution.
- Only (a)
- Both (a) and (c)
- Both (b) and (c)
- Only (b)
Noise pollution in a road-side building can be reduced by
- providing a ditch around the building and filling it with water
- providing a steel mesh around the building
- providing a thick bush around the building
- planting tall trees around the building and fencing them with barbed wires