If you think option C is right then click on option C. If it is right then green will appear or if it is wrong then red will appear.
Set a stopwatch and try to answer the questions for each page of MCQs.
MCQs
| 1. | What is the full form of SONAR ? (RRB JE 2019) | |
| A. | Sound in Navy and In Receivers | |
| B. | Sound Navigation and Ranging | |
| C. | Sound Not in Aircraft Range | |
| D. | Sound Navigation and Receiving | |
Answer: Option B
| 2. | The unit used to measure the supersonic speed is (BSNL JE (TTA) 2016) | |
| A. | knots | |
| B. | Mach | |
| C. | Richter | |
| D. | Hertz | |
Answer: Option B
| 3. | Which of the following can be measured with the help of SONAR ? (RRB JE 2019) | |
| A. | Sound created by animals in forest | |
| B. | Distance of aircrafts | |
| C. | Sound pitch of aircrafts | |
| D. | Distance, direction and speed of under water objects. | |
Answer: Option D
| 4. | An apparatus used for locating submerged objects is known as ? (MP Police SI 2017) | |
| A. | Pulsar | |
| B. | Quasar | |
| C. | Sonar | |
| D. | Radar | |
Answer: Option C
| 5. | SONAR is a device to measure the distance, direction and speed of underwater objects. It uses: (DFCCIL Junior Executive 2018) | |
| A. | infrasonic waves | |
| B. | microwaves | |
| C. | ultrasonic waves | |
| D. | radio waves | |
Answer: Option C
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