Acoustics -Multiple Choice Questions Quiz

Interactive MCQs on “Acoustics”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1:What is the speed of sound in air at 20°C?

(A) 300 m/s
(B) 320 m/s
(C) 343 m/s
(D) 360 m/s

Question 2:Which of the following is a characteristic of sound waves?

(A) They are electromagnetic waves
(B) They are transverse waves
(C) They are longitudinal waves
(D) They do not need a medium to travel

Question 3: What is the frequency range of human hearing?

(A) 20 Hz – 20 kHz
(B) 10 Hz – 50 kHz
(C) 50 Hz – 100 kHz
(D) 5 Hz – 15 kHz

Question 4:What type of wave is a sound wave?

(A) Electromagnetic waves
(B) Transverse waves
(C) Mechanical waves
(D) Longitudinal waves

Question 5:How does the temperature of air affect the speed of sound?

(A) It decreases
(B) It remains the same
(C) It increases
(D) It depends on the humidity

Question 6:What is the phenomenon called when sound waves reflect off a surface?

(A) Absorption
(B) Diffraction
(C) Reflection
(D) Refraction

Question 7:What is the unit of frequency?

(A) Watt (W)
(B) Decibel (dB)
(C) Hertz (Hz)
(D) Newton (N)

Question 8:The Doppler Effect refers to the change in frequency or wavelength of a wave due to the motion of the source or the observer. What causes the Doppler Effect?

(A) Change in temperature
(B) Change in medium
(C) Change in wavelength
(D) Relative motion

Question 9:Which of the following materials would transmit sound the fastest?

(A) Air
(B) Water
(C) Steel
(D) Wood

Question 10:What is the threshold of hearing?

(A) 10 dB
(B) 20 dB
(C) 0 dB
(D) 30 dB