MCQs
| 1. | Which technique is used to determine the depth of the sea, locate the underwater hills, valleys, submarines, icebergs etc.? (RRB JE 2019) | |
| A. | Sound absorption | |
| B. | Infrasound | |
| C. | SONAR | |
| D. | MRI | |
Answer: Option C
| 2. | Supersonic planes fly _______________. (UPPSC Staff Nurse 2022) | |
| A. | with the speed of sound | |
| B. | with the speed less than the speed of sound | |
| C. | with the speed greater than the speed of sound | |
| D. | with the speed of light | |
Answer: Option C
| 3. | N in SONAR stands for: (SSC JE 2021) | |
| A. | Nano | |
| B. | Negative | |
| C. | Neuron | |
| D. | Navigation | |
Answer: Option D
Explanation:
Full form of SONAR is Sound Navigation and Ranging.
| 4. | Which technology uses acoustic waves to locate objects in the ocean ? (RRB NTPC (UG) 2025) | |
| A. | Sonar | |
| B. | LiDAR | |
| C. | Echo-sounder | |
| D. | SAR | |
Answer: Option A
| 5. | What are the main devices present in a SONAR which is used to find the distance, direction and speed of underwater objects ? (RRB JE 2019) | |
| A. | Speaker and microphone | |
| B. | Amplifier and microphone | |
| C. | Transmitter and detector | |
| D. | Amplifier and speaker | |
Answer: Option C
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