Sound-Property of Sound [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 6 of 6
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Question 1
Question MCQ▾
A sound which produces a jarring effect on our ear is called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Music | |
b. | Noise | |
c. | Musical sound | |
d. | Noise pollution |
Question 2
Question MCQ▾
The sound which a normal human can hear is called as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Audible sounds | |
b. | Inaudible sounds | |
c. | None of the above | |
d. | Question does not provide sufficient data or is vague |
Question 3
Question MCQ▾
Ear protectors must be used by the:
Choices
Choice (4) | Response | |
---|---|---|
a. | Pneumatic drill operators | |
b. | Tractors drivers | |
c. | Factory workers | |
d. | All a., b. and c. are correct |
Question 4
Question MCQ▾
Noise pollution is defined as:
Choices
Choice (4) | Response | |
---|---|---|
a. | Pleasant sounds | |
b. | Presence of excessive or unwanted sound in the atmosphere | |
c. | Unpleasant sounds | |
d. | All of the above |
Question 5
Question MCQ▾
Ways of reducing unwanted noise pollution are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Designing quieter engines | |
b. | Use of sound insulating materials | |
c. | Vehicle exhaust systems are fitted with silencers | |
d. | All a., b. and c. are correct |
Question 6
Question MCQ▾
Musical sounds are:
Choices
Choice (4) | Response | |
---|---|---|
a. | Excessive sounds | |
b. | Unwanted sounds | |
c. | Unpleasant sounds | |
d. | Pleasant sounds |