MCQOPTIONS
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MCQOPTIONS
This section includes 7 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. |
Which of the following part of the spring is attached to the sleeve? |
| A. | Upper end |
| B. | Lower end |
| C. | Middle part |
| D. | At a height <sup>3</sup> <sub>4</sub> of total length |
| Answer» C. Middle part | |
| 2. |
Porter governor is used to vary the speed of the turntable in a gramophone. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
In case of pickering governor, the central load is_______ |
| A. | Centripetal force |
| B. | Centrifugal force |
| C. | Torque |
| D. | Normal reaction |
| Answer» C. Torque | |
| 4. |
A Pickering governor is driving a gramophone. Each disc attached to the centre of a leaf spring has a mass of 20 g. The width of each spring is 5 mm and thickness of 0.125 mm. The effective length of each spring is 40 mm. The distance from the spindle axis to the centre of gravity of the mass when the governor is at rest, is 10 mm, find the speed of the turntable in rpm if ratio of the governor speed to the turntable speed is 10.5. |
| A. | 25.5 |
| B. | 2.43 |
| C. | 51.0 |
| D. | 12.25 |
| Answer» C. 51.0 | |
| 5. |
A Pickering governor is driving a gramophone. Each disc attached to the centre of a leaf spring has a mass of 20 g. The width of each spring is 5 mm and thickness of 0.125 mm. The effective length of each spring is 40 mm. The distance from the spindle axis to the centre of gravity of the mass when the governor is at rest, is 10 mm. Find the speed of the governor in rpm when the sleeve has risen to a height of 0.8 mm. (E = 210kN/mm2) |
| A. | 25.5 |
| B. | 2.43 |
| C. | 51.0 |
| D. | 12.25 |
| Answer» B. 2.43 | |
| 6. |
The weights move inwards and the springs bend as they rotate about the spindle axis with increasing speed. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
For driving a gramophone, which of the following governor is used? |
| A. | Watt governor |
| B. | Hartnell governor |
| C. | Porter governor |
| D. | Pickering governor |
| Answer» E. | |