1. Ultrasonic waves are:

a) Longitudinal

b) Progressive

c) Transverse

d) Stationary

2. The sharpness of the resonance curve is influenced by:

a) Mechanical energy loss

b) Frictional energy loss

c) Potential energy loss

d) Kinetic energy loss

3. The phon is a unit used to measure the:

a) Intensity of sound

b) Loudness of sound

c) Phase of sound

d) None of the above

4. In simple harmonic motion (SHM), the velocity at the equilibrium position is:

a) Minimum

b) Constant

c) Zero

d) Maximum

5. The decibel scale is useful for measuring voltages across:

a) A wide frequency ratio

b) A wide voltage ratio

c) A narrow frequency range

d) A narrow voltage range

6. When the X and Y plates of a CRO are connected to unequal voltages of equal frequency with a 90-degree phase shift, the resulting Lissajous figure will be:

a) A circle

b) A straight line

c) An ellipse

d) A figure-of-eight

7. If the length of a sonometer wire is halved, the resonance frequency will:

a) Triple

b) Be halved

c) Quadruple

d) Double

8. In Melde’s experiment (transverse mode), the ratio of the frequency of the tuning fork to the frequency of the waves in the string is:

a) 1:1

b) 2:1

c) 1:2

d) 4:1

9. Which of the following is not considered an acoustical defect in a room?

a) Reverberation

b) Echo formation

c) Absorption

d) Sound focusing

10. Echo formation occurs when the reflecting surface is located at a distance greater than:

a) 7 meters

b) 10 meters

c) 13 meters

d) 17 meters