Sound & Acoustics MCQs with Answers

Past Paper MCQ

The unit of measurement of intensity of sound is in?

• A.Decibel (dB)
• B.Watt per square meter (W/m²)
• C.Hertz (Hz)
• D.Pascal (Pa)

Longitudinal waves do not exhibit _?

• A.Reflection
• B.Refraction
• C.Polarization
• D.Diffraction

When sound travels through air, the air particles _?

• A.Remain stationary while the wave passes through
• B.Vibrate perpendicular to the direction of wave propagation
• C.Move randomly in all directions
• D.Vibrate along the direction of wave propagation

In African Savanna, giraffes communicate with each other over a distance of hundred miles through _?

• A.Ultrasonic waves
• B.Infrasonic waves
• C.Radio waves
• D.Seismic waves

Which of the following waves have the smallest velocity in vacuum?

• A.Radio waves
• B.Light waves
• C.Sound waves
• D.X-rays

When two waves, having the same frequency and amplitude, traveling in the opposite direction meet one another, the resulting interference pattern gives rise to _?

• A.Longitudinal waves only
• B.Electromagnetic waves
• C.Transverse waves only
• D.Stationary waves (standing waves)

A wave has a frequency of 100 Hz and a wavelength of 2 m. What is its speed?

• A.50 m/s
• B.150 m/s
• C.102 m/s
• D.200 m/s

Which one of the following is INCORRECT about the nodes when the string is plucked?

• A.Nodes are points of zero displacement
• B.Nodes are stationary points on the standing wave
• C.Distance between consecutive nodes is 1 wavelength
• D.Nodes alternate with antinodes along the string

At the open end of an organ pipe _ are formed:

• A.Nodes
• B.Antinodes
• C.Compressions
• D.Rarefactions

The fundamental frequency of a closed organ pipe is f. If both the ends are opened then its fundamental frequency will be?

• A.f/2
• B.f
• C.2f
• D.4f