Sound - 2 (Class IX) Online Test

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Sound - 2 (Class IX)

Description: Sound - 1
Number of Questions: 15
Created by: Sangita Pandit
Tags: Sound - 1 Difference Between Noise and Music Noise Pollution and Its Hazardous Effect Remedial Measures to Control Noise Pollution

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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 the burning of fire crackers
Restriction on 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

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Sound - 2 (Class IX)

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