Which of the following statement(s) is/are true regarding Electronic Geophones? (i) Electronic Geophones are used to detect underground leaks in a pressurized water distribution network (ii) An electronic geophone, often referred to in industrial settings as a sounding rod or vibration sensor, is a highly sensitive transducer designed to detect mechanical vibrations and seismic waves by converting ground movement into electrical signals
- AOnly (i)
- BOnly (ii)
- CBoth (i) and (ii)Correct
- DNeither (i) nor (ii)
Solution
Concept
Acoustic leak detection using geophones
Formula
NONE
Step-by-step solution
1. Underground leaks in pressurized pipes emit high-frequency acoustic vibrations. 2. Electronic geophones detect and amplify these vibrations to locate buried pipe leaks, confirming (i). 3. Geophones operate as electro-mechanical transducers converting seismic ground velocity into electrical signals, confirming (ii). 4. Hence, both statements (i) and (ii) are true. Answer: C
Explanation
Electronic geophones are electro-acoustic transducers designed to detect seismic ground vibrations. In pressurized water distribution systems, escaping pressurized water creates ground vibrations and acoustic noise that geophones pick up and convert to amplified electrical signals, pinpointing underground pipe leaks.
Why the other options are wrong
A) Incomplete because statement (ii) correctly describes its transducer operation. B) Incomplete because statement (i) accurately identifies its water network leak detection use. D) Both statements are technically sound and standard in municipal leak surveys.
Shortcut
Electronic geophones = Ground vibration transducers used to listen for buried pipe leaks.
Common mistake
Assuming geophones are strictly seismological tools inapplicable to municipal pipe leaks.
Correct answer: C) Both (i) and (ii)