MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
A shaft supported in ball bearings is assumed to be a simply supported. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
If the static deflection is 1.665 10-3m, calculate the critical speed of the shaft in rps.Centre of disc at 0.25m away from centre of axis of shaft. |
| A. | 8.64 |
| B. | 9.64 |
| C. | 10.64 |
| D. | 12.2 |
| Answer» E. | |
| 3. |
The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ |
| A. | Whirling speed |
| B. | Rotational speed |
| C. | Stabilizing speed |
| D. | Reciprocating speed |
| Answer» B. Rotational speed | |
| 4. |
When the centre of gravity of the rotor lies between the centre line of the shaft and the centre line of the bearing, e is taken positive. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Assuming the shaft to be freely supported. Calculate the whirling speed of the shaft : 2 cm diameter and 60 cm long carrying a mass of 1 kg at its mid-point. The density of the shaft material is 40 Mg/m3, and Young s modulus is 200 GN/m2. |
| A. | 2598 |
| B. | 2434 |
| C. | 2756 |
| D. | 2634 |
| Answer» B. 2434 | |