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1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
The frequency of subsonic sound is less than _______________
20 K
2000 HZ
2 Hz
20 Hz
2
The frequency range of audible sound is ________________ .
5 Hz to 5 kHz
10 Hz to 10 kHz
24 Hz to 24 kHz
20 Hz to 20 kHz
3
For human ears, the audible range is ____________Hz to _______________Hz.
20, 3000
30, 25K
20, 20K
None of these
4
In _______________ it is irregular and non periodic.
Music
Noise
Both (a) and (b) are correct.
None of these.
5
The repetition of sound caused by reflection of sound waves is called an __________________.
Waves
Vibrations
Echo
Signals.
6
Which part of the human ear collects the sound waves from the surroundings?
Pinna
Auditory Canal
Eardrum
Melus
7
The audible range of an average human is :
Above 20 kHz
Below 20 kHz
Below 0.1 Hz
8
An irregularly varying sound be classified as _____________
Alarm
Noice
Monotone
9
Low pressure regions of sound waves are known as ________________________.
Compression
Rarefaction
10
Which of the following frequencies is audible.
15 Hz
30,000 Hz
25,000 Hz
25,00 Hz
11
A boy standing 70 m from a high wall claps his hands. After how much time is an echo heard ? ( The speed of sound in air is )
0.2 sec
0.4 sec
4.2 sec
4 sec
12
The loudness of sound in the range of 15 B - 16 B is ________________
Not audible
Just audible
Moderate
Painful for the ear
13
.The human ear is divided into parts. _______________________________
Inner Ear, Central Ear, Outer Ear
External Ear, Central Ear, Internal Ear
Inner Ear, Middle Ear, Outer Ear
Left Ear, Right Ear
14
Which of the following are correct :
(a) Echoes may be heard more than once due to successive multiple reflections.
(b) To hear an echo, our distance from the reflecting surface should be atleast 17.2 m.
(c) To hear an echo, our distance from the reflecting surface should be atleast 34.4 m.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
All of these.
15
(a) Auditory canal is a part of middle ear.
(b) The outer ear is the cavity with three important ear bones.
(c) The middle ear is the cavity with three important ear bones.
Only (a) is correct.
Only (b) is correct.
Only (c) is correct.