Sound & Acoustics MCQs with Answers

Past Paper MCQ

Decibel (dB) is the unit which can be used to measure the?

• A.Speed of sound
• B.Frequency
• C.Wavelength
• D.Amplitude

If the amplitude of a wave at a distance r from a point source is A, then the amplitude at a distance 2r will be?

• A.A/2
• B.A
• C.2A
• D.A/4

Which of the following is true?

• A.Sound travels fastest in vacuum
• B.Sound cannot travel through vacuum
• C.Sound travels at the same speed in all media
• D.Sound travels only through solids

The order of speed of sound in different mediums from faster to slowest is ?

• A.Gas → Solid → Liquid
• B.Gas → Liquid → Solid
• C.Liquid → Solid → Gas
• D.Solid → Liquid → Gas

The example of mechanical wave is _?

• A.Sound waves
• B.Water waves
• C.Seismic waves
• D.All of these

The meaning of Echoes is _?

• A.Distorted sounds
• B.Fading sounds
• C.Amplified sounds
• D.Repeating sounds

As the temperature rises, the speed of sound ?

• A.First rises then falls
• B.Falls
• C.Remains unchanged
• D.Rises

The speed of sound is maximum in which one of the following?

• A.Air
• B.Water
• C.Iron
• D.Glass

The speed of sound in diamond is _?

• A.1500 m/s
• B.332 m/s
• C.5000 m/s
• D.12000 m/s

The two factors that affect the speed of sound in air are ?

• A.Frequency and wavelength of the sound
• B.Pressure and density of the air
• C.Altitude and wind direction
• D.Temperature and humidity of the air