MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Vibrations knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In forced vibration, the ratio of the maximum displacement to deflection due to static force is: |
| A. | Damping factor |
| B. | Logarithmic decrement |
| C. | Magnification factor |
| D. | Damping coefficient |
| Answer» D. Damping coefficient | |
| 2. |
Consider the system of two wagons shown in the figure. The natural frequencies of this system are |
| A. | 0, \(\sqrt{\frac{{2k}}{{m}}}\) |
| B. | \(\sqrt{\frac{{k}}{{m}}}\) , \(\sqrt{\frac{{2k}}{{m}}}\) |
| C. | \(\sqrt{\frac{{k}}{{m}}}\) , \(\sqrt{\frac{{k}}{{2m}}}\) |
| D. | 0 , \(\sqrt{\frac{{k}}{{2m}}}\) |
| Answer» B. \(\sqrt{\frac{{k}}{{m}}}\) , \(\sqrt{\frac{{2k}}{{m}}}\) | |
| 3. |
A vibrating system with mass 3 kg, stiffness 21 N-s/m and damper having damping coefficient 10 N-s/m. When an exciting force of magnitude 27 sin 2t is acting, what would be the time period of oscillations? |
| A. | 0.78 s |
| B. | 1.56 s |
| C. | 3.14 s |
| D. | 3.89 s |
| Answer» D. 3.89 s | |
| 4. |
A steam turbine rotor of mass 6000 kg is running at 8000 RPM out of the extent of 0.2 cm. The centrifugal force tending to lift the turbine from its foundation will be approximately: |
| A. | 6.4 MN |
| B. | 8.4 MN |
| C. | 10.4 MN |
| D. | 4.4 MN |
| Answer» C. 10.4 MN | |
| 5. |
For what value of m will resonance occur for the spring-mass system given below with the given spring constants? |
| A. | 100 kg |
| B. | 110 kg |
| C. | 120 kg |
| D. | 130 kg |
| Answer» D. 130 kg | |