Sound: MCQ Test (50 questions)

Question 1 of 50

The relationship between the reverberation time and the volume of the hall has been formulated by-

AThe dollar
BNewton
CMavin
DLaplace

Question 2 of 50

Bats can fly in the dark because-

AHe can see clearly in the dark
BThe pupil of his eye is very large.
CThey produce very intense sound waves that control it.
DAny bird can do this.

Question 3 of 50

On which principle of sound does the stethoscope work?

Areflection
BRefraction
CDiffraction
Dpolarization

Question 4 of 50

Who first produced ultrasonic waves by whistling?

ANewton
BGalton
CHertz
DFaraday

Question 5 of 50

Women's voice is sharper than men's because women's voice has-

AThe amplitude is reduced
BThe amplitude is higher
CThe pitch is low,
Dthe pitch is higher

Question 6 of 50

The velocity of sound in air is approximately-

A330m/s
B220m/s
C110m/s
D232m/s

Question 7 of 50

When two loudspeakers are used simultaneously at a place, a listener sitting at a particular place cannot hear their sound. This is because:

Areflection
Binterference
CRefraction
Dresonance

Question 8 of 50

When we sit inside a room, we may not see the people talking in the adjacent room, but we can certainly hear their voices. This is because of sound—

Areflection
BRefraction
Cinterference
DDiffraction

Question 9 of 50

We listen to programs from different stations by turning the radio knob. This is possible through:

Adue to resonance
Bdue to beat
Cdue to interference
DCauses of diffraction

Question 10 of 50

The frequency of infrasonic waves is-

ALess than 20 Hz
BMore than 20 Hz
CMore than 20,000Hz
D20 Hz to 20,000 Hz

Question 11 of 50

If Va, Vw and Vs are the velocity of sound in air, water and steel respectively, then-

AVa < Vw < Vs.
BVs < Vw < Va
CVw < Vs < Va
DVs < Vw < Va

Question 12 of 50

Which process does not occur in both light and sound?

ADiffraction
Breflection
Cpolarization
DRefraction

Question 13 of 50

Which of the following statements regarding the propagation of sound waves is not correct?

ASound waves can travel through water.
BSound waves can travel through air.
Csound waves can travel through steel
Dsound waves can travel through vacuum

Question 14 of 50

Decibel is used to measure which of the following?

Aspeed of light
Bintensity of sound
Cfrequency of radio waves
Dheat intensity

Question 15 of 50

What is the audible range of sound for an average adult person?

A2Hz-2000Hz
B20Hz-2000Hz
C20 Hz-20,000 Hz
D2 Hz20,000 Hz /

Question 16 of 50

Explosions on the Moon are not heard far from the surface.

ADue to the absence of atmosphere
BDue to the absence of atmosphere
CDue to the low intensity of sound waves
Dnone of the above

Question 17 of 50

Ultrasonic waves compared to audible sound waves-

Ahave higher speeds
Bhave higher frequency
Chave longer wavelengths
Dhave both higher speed and higher frequency

Question 18 of 50

Echo sounding is used in-

Ato produce vibrations in sound
Bto increase the frequency of sound
Cto measure the depth of the sea
Dnone of the above

Question 19 of 50

Velocity of sound in different mediums-

Ais the same
Bvaries and is highest in solids
CIt varies and is lowest in liquids.
Dvaries and is highest in gases

Question 20 of 50

In which medium will the speed of sound be maximum at a temperature of about 20°C?

AAir
BGranite
CWater
DIron

Question 21 of 50

If the same note is played on sitar and flute, then the difference in the sound produced by them can be made due to the difference in the following:

Apitch, loudness and quality
Bpitch and loudness only
Csound loudness only
DSound quality only

Question 22 of 50

Beats is a phenomenon that occurs when the frequencies of two harmonic waves are-

Abe equal
Bthere is a considerable difference in
Cbe multiples of each other
Dbe approximately the same

Question 23 of 50

Ships enter silence zones, where the sound of sirens is inaudible. These silent zones are created by what property of sound waves?

Areflection
Binterference
CRefraction
Dresonance

Question 24 of 50

What is the instrument called which is used for identification and alignment of sound waves?

Aradar
BSonar
CPucker
DNone of these

Question 25 of 50

When the army crosses a bridge, the soldiers are instructed not to march in step because-

AThere is a risk of the bridge collapsing due to increased pressure.
BThere is a danger of the bridge breaking due to resonance of the sound produced by the feet
CThere is a danger of bridge collapse due to Dander effect.
Dnone of these

Question 26 of 50

The walls, ceiling and floor of a good auditorium should be made of fibrous material, carpet, glass etc.

ABeautify the auditorium
BReducing the cost of construction
CFire safety in the auditorium
DAbsorbing sound to prevent echoes

Question 27 of 50

Why is the voice of a small child more pleasant than the voice of a young man?

AThe pitch of a child's voice is lower than that of a man's voice.
BThe pitch of a child's voice is higher than that of a man's voice
CThe child has more strength
Dnone of the above

Question 28 of 50

Supersonic aircraft fly in-

Aat the speed of sound
Bat a speed less than the speed of sound
Cfaster than the speed of sound
Dat the speed of light

Question 29 of 50

The speed of sound in air is 332 meters per second. If the pressure is doubled, the speed of sound will be

A664m/s
B332m/s
C166m/s
D100m/s

Question 30 of 50

What should be the time interval between the original sound and the echo to hear an echo?

Aequal to 1/10 second
Bless than 1/10-second
Cmore than 1/10-second
DNone of these.

Question 31 of 50

The nature of sound waves is-

Atransverse
Blongitudinal
Celectromagnetic
Dnon-progressive

Question 32 of 50

On hearing thunder, a person opens his mouth so that-

Acan dispel fear
BTo equalize the air pressure on the eardrums of both ears
CTo equalize the air pressure on the eardrums of both ears
Dto expel air through the mouth

Question 33 of 50

What is the approximate speed of boiling in distilled water at 25°C (77°F)?

A1284 m/s
B3980 m/s
C1598 m/s
D1498 m/s.

Question 34 of 50

Radio tuning station is an example of

Areflection
Bresonance
Creflection
DRefraction

Question 35 of 50

Which one of the following statements is not correct?

ASound waves in gases are longitudinal in nature.
BSound waves with a frequency less than 20 Hz are called ultrasonic waves.
CSound waves with higher amplitudes are louder
DSound waves with high audible frequencies are sharp.

Question 36 of 50

Velocity of sound in air-

Adecreases with increase in temperature
Bincreases with decreasing temperature
Cis not dependent on temperature
Ddecreases with decreasing temperature

Question 37 of 50

Which one of the following statements is not correct about sound?

Asound travels slower than the speed of light
BSound travels faster in humid air than in dry air
Csound waves are longitudinal waves
Dsound waves are longitudinal waves

Question 38 of 50

In which one of the following is the attention speed the highest?

Ain air at 0°C
Bin air at 100°C
Cin water
Din wood

Question 39 of 50

What is the characteristic of sound that distinguishes a female voice from a male voice called?

Apitch
Bphase
Cquality
Dintensity

Question 40 of 50

The voice of women is thinner than that of men because the voice of women-

Ahas a higher frequency
Bhas a greater wavelength.
Chas a greater amplitude
Dhas a greater velocity

Question 41 of 50

Acoustic is the science of-

Arelated to light
Brelated to sound
Cclimate-related
Dmetal-related

Question 42 of 50

The maximum limit of sound intensity in decibels above which a person cannot hear is-

A50dB
B70 dB
C85 dB.
D95 dB

Question 43 of 50

Which one of the following statements is not correct?

AThe velocity of sound in air increases with increase in temperature
BThe velocity of sound in air does not depend on pressure.
CThe velocity of sound in air decreases with increase in humidity.
DThe velocity of sound in air is not affected by changes in amplitude and frequency.

Question 44 of 50

The reverberation time of Dead Hall is-

A0.8 seconds
B0.8 seconds
C1.8 seconds
D8 seconds

Question 45 of 50

What causes sound waves to produce echoes?

ARefraction
BDiffraction
Creflection
DNone of these

Question 46 of 50

How long does the effect of sound last in the human ear?

A1/5 second
B1/10 second
C1/20 second
D1/2 second

Question 47 of 50

The intensity of sound of ordinary conversation is-

A20-30dB
B30-40 dB
C50-60dB
D90-100 dB

Question 48 of 50

In which medium does sound travel fastest?

ASolid
Bfluid
Cgas
DAir

Question 49 of 50

The ratio of the velocity of an object to the velocity of sound in the same medium and under the same conditions is called-

APlace number
BDurability Number
Coctane number
DMach number

Question 50 of 50

Mach numbers are used in relation to velocity.

Aof sound
Bof the vessel
Cof the aircraft
Dof the spacecraft