MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the mass increases, then the frequency of the free vibrations increases. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
A body of mass 20 kg is suspended from a spring which deflects 20mm under this load. Calculate the frequency of free vibrations in Hz. |
| A. | 3.5 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» B. 5 | |
| 3. |
In which of the cases the factor c = 0? |
| A. | When there is damping |
| B. | No damping |
| C. | Resonance |
| D. | c is never 0 |
| Answer» C. Resonance | |
| 4. |
Maximum displacement due to forced vibration is dependent on deflection due to static force. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Magnification factor is the ratio of the maximum displacement due to forced vibrations to the deflection due to _______ |
| A. | Static force |
| B. | Dynamic force |
| C. | Torsion |
| D. | Compression |
| Answer» B. Dynamic force | |
| 6. |
Unit of damping factor is N/m/s. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
Calculate critical damping coefficient in N/m/s from the following data:
|
| A. | n = 40rad/s |
| B. | 25,132 |
| C. | 26,132 |
| D. | 27,132 |
| E. | 28,132 |
| Answer» B. 25,132 | |
| 8. |
Calculate critical damping coefficient in Ns/m from the following data.
|
| A. | n = 20rad/s |
| B. | 25,132 |
| C. | 26,132 |
| D. | 27,132 |
| E. | Not possible |
| Answer» E. Not possible | |
| 9. |
The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ |
| A. | Damping factor |
| B. | Damping coefficient |
| C. | Resistive factor |
| D. | Resistive coefficient |
| Answer» B. Damping coefficient | |