Practice Sound RRB PYQ questions asked in various Railway Recruitment Board examinations. This page provides important previous year questions from the Sound chapter along with correct answers and clear explanations to help you prepare effectively for RRB Physics.
The Sound chapter covers important concepts such as the nature of sound waves, frequency range of sound waves, speed of sound, characteristics of sound, echo, SONAR and RADAR. These concepts are important for understanding the types of Physics questions commonly asked in Railway examinations.
Start practicing Sound RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
131
A sound wave has frequency 3.5 kHz and wavelength 0.1 m. How long does it take to travel 700 m?
RRB ALP & Technician
30/08/2018 (Shift-III)
2018
✓ Answer:D2 s
v = 3500 × 0.1 = 350 m/s; t = 700/350 = 2 s.
132
Sound waves below the audible frequency range are called:
RRB Group-D
18/09/2018 (Shift-I)
2018
✓ Answer:DInfrasonic
Infrasonic waves have frequencies below 20 Hz.
133
Find the speed of sound in air from the following options.
RRB Group-D
31/10/2018 (Shift-I)
2018
✓ Answer:A331 m s⁻¹
Near 0°C, sound travels at approximately 331 m/s. The correct speed unit is m s⁻¹.
134
Which frequency is outside the conventional human audible range?
RRB Group-D
08/10/2018 (Shift-II)
2018
✓ Answer:B22000 Hz
22000 Hz exceeds the conventional upper hearing limit of 20000 Hz.
135
What is the speed of sound in air at 0°C?
RRB ALP & Technician
14/08/2018 (Shift-I)
2018
✓ Answer:A331 metres per second
The approximate speed at 0°C is 331 m/s.
136
What is the frequency of infrasonic waves?
RRB Group-D
13/12/2018 (Shift-II)
2018
✓ Answer:CLess than 20 Hz
Infrasound is below 20 Hz. Options B and D are printed identically.
137
A sound source produces frequency 600 Hz and wavelength 3 m. What is the wave speed?
RRB Group-D
10/10/2018 (Shift-II)
2018
✓ Answer:B1800 m s⁻¹
v = fλ = 600 × 3 = 1800 m/s.
138
A sound wave travels at 340 m/s with wavelength 2 cm. What is its frequency?
RRB Group-D
12/10/2018 (Shift-III)
2018
✓ Answer:A17000 Hz
f = v/λ = 340/0.02 = 17000 Hz. Options A and C are identical in the source; the printed key selects A.
139
Calculate the wavelength of sound with frequency 200 Hz and speed 400 m/s.
These RRB Sound PYQ questions help you understand the question pattern and important concepts from the Sound chapter. Each question is provided with the correct answer and a clear explanation, making this page useful for both revision and regular practice.
Whether you are preparing for RRB NTPC Sound PYQ, RRB Group D Sound PYQ, RRB JE Sound PYQ, RRB ALP Sound PYQ, or RRB Technician Sound PYQ, practice these previous year questions regularly to strengthen your Physics preparation.
Tags: Sound RRB Physics PYQ, Sound Previous Year Questions, RRB NTPC Sound PYQ, RRB Group D Sound PYQ, RRB JE Sound PYQ, RRB ALP Sound PYQ, RRB Technician Sound PYQ, Sound Questions for Railway Exams, Sound MCQ for RRB Exams, Physics Sound Questions, Sound Waves RRB PYQ
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