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Physics 10 Chapter 11 - Sound - 26
1.
By which of the following surface, reflection of sound is more prominent?
a) Porous surfaces
b) Soft surfaces
c) Rigid surfaces
d) Irregular surfaces
2.
By which of the following surface, reflection of sound is more prominent?
a) Smooth surfaces
b) Irregular surfaces
c) Soft surfaces
d) Porous surfaces
3.
By which of the following surface, reflection of sound is less?
a) Rigid surfaces
b) Smooth surfaces
c) Hard surfaces
d) Irregular surfaces
4.
By which of the following surface, reflection of sound is less?
a) Soft surfaces
b) Hard surfaces
c) Smooth surfaces
d) Rigid surfaces
5.
Draperies are ...................materials?
a) Soft and porous
b) Hard and smooth
c) Rigid and porous
d) Irregular and smooth
6.
What are multiple reflections called?
a) Acoustic protection
b) Resonance
c) Reverberations
d) Damping
7.
How the ceilings of lecture halls are made?
a) Smooth
b) Plane
c) Curved
d) Straight
8.
How the ceilings of conference halls are made?
a) Plane
b) Curved
c) Smooth
d) Straight
9.
How the ceilings of theatre halls are made?
a) Curved
b) Straight
c) Smooth
d) Plane
10.
Which of the following organisms can see using sound waves?
a) Lions
b) Dolphins
c) Sharks
d) Rats
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