MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Kinematics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The force of friction is _____________ for different lubricants. |
| A. | same |
| B. | different |
| C. | zero |
| D. | none of the mentioned |
| Answer» B. different | |
| 2. |
The force of friction is dependent of the substances of the bearing surfaces. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The force of friction is almost dependent of the load. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
A single plate clutch, with both sides effective, has outer and inner diameters 300 mm and 200 mm respectively. The maximum intensity of pressure at any point in the contact surface is not to exceed 0.1 N/mm2. If the coefficient of friction is 0.3, determine the power transmitted by a clutch at a speed 2500 r.p.m. |
| A. | 61.693 kW |
| B. | 71.693 kW |
| C. | 81.693 kW |
| D. | 91.693 kW |
| Answer» B. 71.693 kW | |
| 5. |
A multiple disc clutch has five plates having four pairs of active friction surfaces. If the intensity of pressure is not to exceed 0.127 N/mm2, find the power transmitted at 500 r.p.m. The outer and inner radii of friction surfaces are 125 mm and 75 mm respectively. Assume uniform wear and take coefficient of friction = 0.3. |
| A. | 17.8 kW |
| B. | 18.8 kW |
| C. | 19.8 kW |
| D. | 20.8 kW |
| Answer» C. 19.8 kW | |
| 6. |
THE_FORCE_OF_FRICTION_IS_DEPENDENT_OF_THE_SUBSTANCES_OF_THE_BEARING_SURFACES.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The_force_of_friction_is_______________for_different_lubricants.$ |
| A. | same |
| B. | different |
| C. | zero |
| D. | none of the mentioned |
| Answer» B. different | |
| 8. |
The force of friction is almost dependent of the load? |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
The force of friction is dependent of the velocity of sliding of one body relative to the other body. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
The force of friction depends upon the material of which the contact surfaces are made. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
The force of friction is dependent of the area of the contact surface for a given normal load. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The force of friction is inversely proportional to the normal load between the surfaces. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
A 60 mm diameter shaft running in a bearing carries a load of 2000 N. If the coefficient of friction between the shaft and bearing is 0.03, find the power transmitted when it runs at 1440 r.p.m. |
| A. | 171.4 W |
| B. | 271.4 W |
| C. | 371.4 W |
| D. | 471.4 W |
| Answer» C. 371.4 W | |
| 14. |
A single plate clutch, with both sides effective, has outer and inner diameters 300 mm and 200 mm respectively. The maximum intensity of pressure at any point in the contact surface is not to exceed 0.1 N/mm2. If the coefficient of friction is 0.3, determine the power transmitted by a clutch at a speed 2500 r.p.m. |
| A. | 61.693 kW |
| B. | 71.693 kW |
| C. | 81.693 kW |
| D. | 91.693 kW |
| Answer» B. 71.693 kW | |
| 15. |
A multiple disc clutch has five plates having four pairs of active friction surfaces. If the intensity of pressure is not to exceed 0.127 N/mm2, find the power transmitted at 500 r.p.m. The outer and inner radii of friction surfaces are 125 mm and 75 mm respectively. Assume uniform wear and take coefficient of friction = 0.3. |
| A. | 17.8 kW |
| B. | 18.8 kW |
| C. | 19.8 kW |
| D. | 20.8 kW |
| Answer» C. 19.8 kW | |