Sound & Acoustics MCQs with Answers

Transverse waves move?

• A.Parallel to the direction of wave
• B.Perpendicular to the direction of wave
• C.In a circular motion to the direction of wave
• D.In the opposite direction of wave

Past Paper MCQ

The speed of sound in air is ?

• A.3 × 10⁸ m/s
• B.300 m/s
• C.1500 m/s
• D.343 m/s

What is Acoustics?

• A.Science of Light
• B.Science of Sound
• C.Science of Heat
• D.Science of Motion

If the first frequency is 1 Hz and the wave is split into 4 parts, what is the value of the second frequency?

• A.4 Hz
• B.0.25 Hz
• C.1 Hz
• D.2 Hz

What happens when two waves of the same frequency and amplitude meet in phase?

• A.They cancel each other out, resulting in zero amplitude
• B.They combine to form a wave with half the original amplitude
• C.They reflect off each other and travel in opposite directions
• D.They combine to form a wave double the amplitude, resulting in constructive interference

In which of the following is the speed of sound maximum?

• A.Air
• B.Water
• C.Wood
• D.Vacuum

The unit for measuring intensity of noise is called :

• A.Hertz
• B.Watt
• C.Decibel
• D.Pascal

The voice of a lion is different from that of a mosquito because

• A.the sounds have different pitch
• B.the sounds have different loudness
• C.the sounds travel at different speeds
• D.the sounds have different wavelengths only

Why do the police use dogs for detective work?

• A.They have a strong sense of smell
• B.They can hear ultrasonic waves
• C.They can see in complete darkness
• D.They have excellent memory

Past Paper MCQ

Standard unit of sound intensity:

• A.W/m²
• B.J/s
• C.N/m²
• D.dB