Echo of Sound Multiple Choice Questions with Answers – PDF Download

MCQ 1: To communicate with each other, Elephants use:

1. low frequency sound waves
2. low frequency light waves
3. high frequency sound waves
4. low frequency heat waves

MCQ 2: When sound is incident on the surface of a medium it bounces back into the first medium. The phenomenon is called:

1. refraction of sound
2. deflection of sound
3. defraction of sound
4. reflection of sound

MCQ 3: The total distance covered by the sound from the point of generation to the reflecting surface and back should be at least:

1. 30 m
2. 34 m
3. 40 m
4. 38 m

MCQ 4: For hearing distinct echoes, the minimum distance of the obstacle from the source of sound must be:

1. double to this distance
2. equal to this distance
3. half of this distance
4. one third to this distance

MCQ 5: Echoes may be heard more than once due to successive or multiple reflections:

1. deflections
2. defraction
3. refractions
4. reflections