Lesson 5 Acoustics | MCQ Practice

Q1. Why are curtains used on walls in auditoriums to improve sound clarity?

To absorb unwanted reflections To reflect more sound To increase sound speed To change frequency

Q2. How do soft curtains affect sound reflection?

They absorb more sound They reflect all sound They double sound speed They make frequency zero

Q3. Can sound travel through vacuum?

No Yes Only in vacuum Only with light

Q4. Which measure can help reduce noise in cities?

Planting trees and using sound barriers Using more horns Locating industries inside residential areas Increasing loudspeakers

Q5. Sound waves in air are:

Longitudinal waves Transverse waves Electromagnetic waves Only standing waves

Q6. Which type of waves does SONAR use?

Ultrasound Light waves Radio waves Only infrared

Q7. Which waves do bats use for navigation?

Ultrasound Infrasound Light waves Radio waves

Q8. Which law governs reflection of sound?

Angle of incidence equals angle of reflection Angle of incidence is always 0° Reflection angle is 90° Wavelength is zero

Q9. In what form does sound transfer energy through a medium?

As a wave By permanent forward movement of particles As light As electricity

Q10. What determines the pitch of a sound?

Frequency Amplitude Speed alone Intensity alone