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Physics 10 Chapter 11 - Sound - 24
1.
What are the main sources of noise?
a) Transportation equipment
b) Both b and c
c) Violin
d) Heavy machinery
2.
Which of the following are included in noise?
a) Violin
b) Loud vehicles in horns
c) Guitar
d) Sitar
3.
Which of the following are included in noise?
a) Guitar
b) Alarms
c) Sitar
d) Violin
4.
What are the negative effects of noise on human health?
a) Sleep disturbances
b) Aggression
c) All of these
d) Hearing loss
5.
What are the negative effects of noise on human health?
a) High stress level
b) Hypertension
c) All of these
d) Aggression
6.
What are the factors on which safe level of noise depends?
a) The period of exposure of music
b) The level of noise
c) Both b and c
d) The period of exposure to noise
7.
What is the safe level of noise recommended in most countries?
a) 85 - 100 dB
b) 85 - 90 dB
c) 85 - 95 dB
d) 85 - 95 dB
8.
For how many hours of workday the safe level of noise recommended in most countries is 85 - 90 dB?
a) Ten
b) Eleven
c) Nine
d) Eight
9.
Which of the following measures can reduce noise pollution?
a) Replacing noisy machinery with environment-friendly machinery
b) Putting sound-reducing barriers
c) All of these
d) Using hearing protection devices
10.
Upon how many factors, safe level of noise depends?
a) Four
b) Two
c) One
d) Three
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