MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An ultrasound pulse sent by a source in sea is reflected by a submerged target at a distance 597.50m and reaches the source after 0.83seconds. Find the velocity of sound in sea water. |
| A. | 495.925m/s |
| B. | 719.879m/s |
| C. | 110m/s |
| D. | 1439.75m/s |
| Answer» E. | |
| 2. |
A quartz crystal of thickness 0.001m is vibrating at resonance. Calculate the fundamental frequency. Density of quartz = 2.650×103 kg/m3 and Young’s modulus for quartz = 7.9×1010 N/m2. |
| A. | 2.7299×106MHz |
| B. | 26.50×103Hz |
| C. | 2.093×106Hz |
| D. | 2.7299×1010MHz |
| Answer» B. 26.50×103Hz | |
| 3. |
Sonograms work under the principle of Doppler Effect. |
| A. | False |
| B. | True |
| Answer» C. | |
| 4. |
What is the other name for ultrasonic flaw detector? |
| A. | Destructive testing |
| B. | Magnetostrictive testing |
| C. | Non-destructive testing |
| D. | Echo testing |
| Answer» D. Echo testing | |
| 5. |
A_QUARTZ_CRYSTAL_OF_THICKNESS_0.001M_IS_VIBRATING_AT_RESONANCE._CALCULATE_THE_FUNDAMENTAL_FREQUENCY._DENSITY_OF_QUARTZ_=_2.650‚ÄÖ√†√∂‚Àւ•103_KG/M3_AND_YOUNG‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_MODULUS_FOR_QUARTZ_=_7.9‚ÄÖ√†√∂‚Àւ•1010_N/M2.?$# |
| A. | 2.7299√ó10<sup>6</sup>MHz |
| B. | 26.50√ó10<sup>3</sup>Hz |
| C. | 2.093√ó10<sup>6</sup>Hz |
| D. | 2.7299√ó10<sup>10</sup>MHz |
| Answer» B. 26.50‚Äö√†√∂‚àö‚â•10<sup>3</sup>Hz | |
| 6. |
An_ultrasound_pulse_sent_by_a_source_in_sea_is_reflected_by_a_submerged_target_at_a_distance_597.50m_and_reaches_the_source_after_0.83seconds._Find_the_velocity_of_sound_in_sea_water.$ |
| A. | 495.925m/s |
| B. | 719.879m/s |
| C. | 110m/s |
| D. | 1439.75m/s |
| Answer» E. | |
| 7. |
Sonograms work under the principle of Doppler Effect? |
| A. | False |
| B. | True |
| Answer» C. | |
| 8. |
What is the other name for ultrasonic flaw detector? |
| A. | Destructive testing |
| B. | Magnetostrictive testing |
| C. | Non-destructive testing |
| D. | Echo testing |
| Answer» D. Echo testing | |
| 9. |
What is cold welding? |
| A. | Welding at very low temperature |
| B. | Welding using ultrasonic waves |
| C. | Welding under water |
| D. | Welding at constant temperature |
| Answer» C. Welding under water | |
| 10. |
What is the principle for measurement of the velocity of ultrasonic waves? |
| A. | Magnetostriction effect |
| B. | Acoustical grating |
| C. | Doppler Effect |
| D. | Acceleration effect |
| Answer» C. Doppler Effect | |
| 11. |
Which of the following causes acoustical grating? |
| A. | Magnetic waves |
| B. | Electric waves |
| C. | Magnetostriction effect |
| D. | Ultrasonic waves |
| Answer» E. | |
| 12. |
When is ultrasonic waves produced using piezo electric oscillator? |
| A. | At constant temperature |
| B. | At resonance |
| C. | At constant pressure |
| D. | At constant voltage |
| Answer» C. At constant pressure | |
| 13. |
It is not possible to get a constant single frequency using magnetostriction effect. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Which of the following effects can be used to produce ultrasonic waves? |
| A. | Magnetostriction effect |
| B. | Doppler Effect |
| C. | Magnetic effect |
| D. | Sound effect |
| Answer» B. Doppler Effect | |