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. |
When the length of the connecting rod is unknown then the value ( 2 1)/2 is equal to ________ |
| A. | t/s |
| B. | t/2s |
| C. | t/2r |
| D. | t/r |
| Answer» C. t/2r | |
| 2. |
The balance energy required for punching is supplied by the flywheel by ________ |
| A. | Increase in its kinetic energy |
| B. | Decrease in its kinetic energy |
| C. | Decrease in its potential energy |
| D. | By variation of mass |
| Answer» C. Decrease in its potential energy | |
| 3. |
In a punching press, the requirement is to punch 40 mm diameter holes in a plate having a thickness of 15 mm. The rate at which the holes should be punched is 30 holes/min. Energy requirement is of 6 N-m per mm2 of sheared area. If the punching takes time 1/10 of a second and the speed of the flywheel varies from 160 to 140 rpm, determine the mass of the flywheel having radius of gyration of 1 m. |
| A. | 327 Kg |
| B. | 654 Kg |
| C. | 163.5 Kg |
| D. | 200 Kg |
| Answer» B. 654 Kg | |
| 4. |
The relation between stroke punch s and radius of crank r is ______ |
| A. | s=r |
| B. | s=2r |
| C. | s=4r |
| D. | s=r/2 |
| Answer» C. s=4r | |
| 5. |
The maximum shear force required for punching depends on ________ |
| A. | Sheared area |
| B. | Length of the plate |
| C. | Speed of the flywheel |
| D. | Total load |
| Answer» B. Length of the plate | |