MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Efficiency of conventional power screw is greater than the efficiency of recirculating ball screw. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
What is the efficiency of differential screws when pitch of the two screws is 12mm and 8mm? The nut is rotated by applying a force of 120N at a radius of 300mm and the two screws remain stationary. The torque of raising and lowering for the two screws is 5k N-mm and 2.5k N-mm where k is the effective axial weight on the screw. |
| A. | 6.48% |
| B. | 8.48% |
| C. | 23.1% |
| D. | 42.8% |
| Answer» C. 23.1% | |
| 3. |
What is the output from differential screws when pitch of the two screws is 12mm and 8mm? Also the nut is rotated by applying a force of 120N at a radius of 300mm and the two screws remain stationary. The torque of raising and lowering for the two screws is 5k N-mm and 2.5k N-mm where k is the effective axial weight on the screw. |
| A. | 13200 N-mm |
| B. | 15200 N-mm |
| C. | 19200 N-mm |
| D. | 17200 N-mm |
| Answer» D. 17200 N-mm | |
| 4. |
How many types of jacks are there which can be used in a screw jack? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |