Sound Test

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Sound Test - 52

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Weekly Quiz Competition

Question 1
1 / -0

Rolling of thunder is an example of:

A
multiple echo

B
no echo

C
single echo

D
all of the above

Solution

Multiple echos may be heard one after the other when sound gets repeatedly reflected from distant high rise buildings or hills . The rolling of thunder is also an example of multiple echos by the clouds.
Question 2
1 / -0

Why do we hear more clearly in a room with curtains than in a room without curtains?

A
Sound is absorbed by the curtains

B
Less reverberation

C
Both $$A$$ and $$B$$

D
None of these

Solution

We hear more clearly in a room with curtains than in a room without curtains because sound is absorbed by the curtains. A sound created in a room without will persist by repeated reflection from the walls until it is reduced to a value where it is no longer audible. The repeated reflection that results in this persistence of sound is called reverberation. To reduce reverberation, the curtains will act as a sound-absorbent material.
Question 3
1 / -0

SONAR can be used:

A
For determination of a depth of a sea

B
In the ships to locate underwater rocks, icebergs

C
To measure the distance, direction, and speed of underwater objects, such as hills, valleys, etc.

D
All of the above

Solution

SONAR stands for Sound Navigation And Ranging. Sonar is a device that uses ultrasonic waves to measure the distance, direction, and speed of underwater objects. The sonar technique is used to determine the depth of the sea and to locate underwater hills, valleys, submarines, icebergs, sunken ships, etc.
Question 4
1 / -0

SONAR set up consists of :

A
a transmitter

B
a detector

C
channel

D
all of the above

Solution

The SONAR set-up is generally installed on a boat or ship. It consists of a transmitter, channel and detector. Transmitter produces and transmits ultrasonic waves and, channel and detector together used to receive reflected ultrasonic waves into electric signals.
Question 5
1 / -0

Curved surfaces which are used in the big hall to direct the sound waves towards the people sitting in a hall are known as:

A
Megaphone

B
Hydrophone

C
Bulb horn

D
None of the above

Solution

Soundboards are curved surfaces (concave) that are used in a big hall to direct the sound waves towards the people sitting in a hall. The source of sound is placed at the focus of the soundboard.
Question 6
1 / -0

What type of waves are generated by SONAR device fixed to a fishing ship?

A
water waves

B
radiowaves

C
sound waves

D
infrared waves

Solution

Sonar (sound navigation and ranging) is a technology that uses acoustical (ultrasonic sound waves ) waves to sense the location of objects in the ocean. The simplest sonar devices send out a sound pulse from a transducer, and then precisely measure the time it takes for the sound pulses to be reflected back to the transducer. Which helps in calculating distance of object.
Question 7
1 / -0

Which of the following device does not work on the multiple reflections of sound waves?

A
stethoscope

B
hydrophone

C
soundboard

D
megaphone

Solution

Stethoscope is a medical diagnostic instrument based on multiple reflection of sound waves.
This is used by doctors for listening to the sounds produced inside the body.
Sound board is a concave rigid surface which is placed behind the speaker in a big hall so that his words can be heard clearly even by the people sitting away from the stage.
Question 8
1 / -0

Which wave is used to analyse the development of an unborn child?

A
ultrasonic wave

B
infrasonic wave

C
audible wave

D
none

Solution

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.
An ultrasound scan uses high-frequency sound waves to make an image of a person's internal body structures. Doctors commonly use ultrasound to study a developing fetus (unborn baby), a person's abdominal and pelvic organs, muscles and tendons, or their heart and blood vessels.
Question 9
1 / -0

The method of detecting the presence, position, and direction of motion of distant objects by reflecting a beam of sound waves is known as _______.

A
RADAR

B
SONAR

C
MIR

D
CRO

Solution

SONAR(Sound Navigation And Ranging) is a technique that uses ultrasound to measure the distance, direction, distance, and speed of underwater objects.
Question 10
1 / -0

_________ is a device which is based on multiple reflection and isused for sending amplified sound in a particular direction.

A
Bulb horn

B
Megaphone

C
Ear trumpet

D
all of the above

Solution

All are based on multiple reflection and used for sending amplified sound in a particular direction.

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Re-Attempt Weekly Quiz Competition

Sound Test - 52

Result

Sound Test - 52

Score

-

Rank

-

SHARING IS CARING

Question 1

multiple echo

no echo

single echo

all of the above

Solution

Question 2

Sound is absorbed by the curtains

Less reverberation

Both $$A$$ and $$B$$

None of these

Solution

Question 3

For determination of a depth of a sea

In the ships to locate underwater rocks, icebergs

To measure the distance, direction, and speed of underwater objects, such as hills, valleys, etc.

All of the above

Solution

Question 4

a transmitter

a detector

channel

all of the above

Solution

Question 5

Megaphone

Hydrophone

Bulb horn

None of the above

Solution

Question 6

water waves

radiowaves

sound waves

infrared waves

Solution

Question 7

stethoscope

hydrophone

soundboard

megaphone

Solution

Question 8

ultrasonic wave

infrasonic wave

audible wave

none

Solution

Question 9

RADAR

SONAR

MIR

CRO

Solution

Question 10

Bulb horn

Megaphone

Ear trumpet

all of the above

Solution

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