MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
When friction acts at the sleeve the maximum angular velocity increases? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the power of the governor in N-m |
| A. | 447 |
| B. | 44.7 |
| C. | 4.47 |
| D. | 5.0 |
| Answer» D. 5.0 | |
| 3. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the governor effort. |
| A. | 44.7 N |
| B. | 57.4 N |
| C. | 88.4 N |
| D. | 53.8 N |
| Answer» C. 88.4 N | |
| 4. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the range of speed in rpm. |
| A. | 31.4 |
| B. | 35.4 |
| C. | 45.2 |
| D. | 15.6 |
| Answer» B. 35.4 | |
| 5. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the power of the governor in N-m. |
| A. | 447 |
| B. | 44.7 |
| C. | 4.47 |
| D. | 5.0 |
| Answer» D. 5.0 | |
| 6. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the governor effort. |
| A. | 44.7 N |
| B. | 22.35 N |
| C. | 89.4 N |
| D. | 50 N |
| Answer» B. 22.35 N | |
| 7. |
A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the sleeve lift. |
| A. | 0.2m |
| B. | 0.1m |
| C. | 0.5m |
| D. | 200 mm |
| Answer» C. 0.5m | |
| 8. |
For a porter governor, Each arm has a length of 250mm and pivoted on the axis of rotation. Sleeves carry a mass of 25kg and each ball s mass is 5Kg. Radius of rotation: 150mm at the beginning of lift and 200mm at the maximum speed of governor. Find range in speed neglecting friction in rpm. |
| A. | 25 |
| B. | 35 |
| C. | 45 |
| D. | 15 |
| Answer» B. 35 | |