MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
FOR_LOW_AND_MODERATE_SPEED_ENGINES,_THE_CAM_FOLLOWER_SHOULD_MOVE_WITH?$ |
| A. | uniform velocity |
| B. | simple harmonic motion |
| C. | uniform acceleration and retardation |
| D. | cycloidal motion |
| Answer» C. uniform acceleration and retardation | |
| 2. |
Which of the following displacement diagrams should be chosen for better dynamic performance of a cam-follower mechanism ?$ |
| A. | simple hormonic motion |
| B. | parabolic motion |
| C. | cycloidal motion |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
For_high_speed_engines,_the_cam_follower_should_move_with$ |
| A. | uniform velocity |
| B. | simple harmonic motion |
| C. | uniform acceleration and retardation |
| D. | cycloidal motion |
| Answer» E. | |
| 4. |
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by |
| A. | ω<sup>2</sup>×OQ |
| B. | ω<sup>2</sup>×OQsinθ |
| C. | ω<sup>2</sup>×OQcosθ |
| D. | ω<sup>2</sup>×OQtanθ |
| Answer» B. ‚âà√¨‚àö¬¢<sup>2</sup>‚Äö√†√∂‚àö‚â•OQsin‚âà√≠‚Äö√†√® | |
| 5. |
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by |
| A. | R(1-cosθ) |
| B. | R(1-sinθ) |
| C. | (R-r<sub>1</sub>)(1-cosθ) |
| D. | (R-r<sub>1</sub>)(1-sinθ) |
| Answer» D. (R-r<sub>1</sub>)(1-sin‚âà√≠‚Äö√†√®) | |
| 6. |
The_linear_velocity_of_the_reciprocating_roller_follower_when_it_has_contact_with_the_straight_flanks_of_the_tangent_cam,_is_given_by |
| A. | ω(r<sub>1</sub>-r<sub>2</sub>)sinθ |
| B. | ω(r<sub>1</sub>-r<sub>2</sub>)cosθ |
| C. | ωr<sub>1</sub>+r<sub>2</sub>)sinθsec<sup>2</sup>θ |
| D. | ω(r<sub>1</sub>+r<sub>2</sub>)cosθcosec<sup>2</sup>θ |
| Answer» D. ‚âà√¨‚àö¬¢(r<sub>1</sub>+r<sub>2</sub>)cos‚âà√≠‚Äö√†√®cosec<sup>2</sup>‚âà√≠‚Äö√†√® | |
| 7. |
Ofset is provided to a cam follower mechanism t? |
| A. | minimise the side thrust |
| B. | accelerate |
| C. | avoid jerk |
| D. | none of the mentioned |
| Answer» B. accelerate | |
| 8. |
A radial follower is one |
| A. | that reciprocates in the guides |
| B. | that oscillates |
| C. | in which the follower translates along an axis passing through the cam centre of rotation. |
| D. | none of the mentioned |
| Answer» B. that oscillates | |
| 9. |
In a radial cam, the follower moves |
| A. | in a direction perpendicular to the cam axis |
| B. | in a direction parallel to the cam axis |
| C. | in any direction irrespective of the cam axis |
| D. | along the cam axis |
| Answer» B. in a direction parallel to the cam axis | |
| 10. |
The cam follower extensively used in air-craft engines is |
| A. | knife edge follower |
| B. | flat faced follower |
| C. | spherical faced follower |
| D. | roller follower |
| Answer» E. | |
| 11. |
The cam follower generally used in automobile engines is |
| A. | knife edge follower |
| B. | flat faced follower |
| C. | spherical faced follower |
| D. | roller follower |
| Answer» D. roller follower | |
| 12. |
A circle drawn with centre as the cam centre and radius equal to the distance between the cam centre and the point on the pitch curve at which the pressure angle is maximum, is called |
| A. | base circle |
| B. | pitch circle |
| C. | prime circle |
| D. | none of the mentioned |
| Answer» C. prime circle | |
| 13. |
The angle between the direction of the follower motion and a normal to the pitch curve is called |
| A. | pitch angle |
| B. | prime angle |
| C. | base angle |
| D. | pressure angle |
| Answer» E. | |
| 14. |
The size of a cam depends upon |
| A. | base circle |
| B. | pitch circle |
| C. | prime circle |
| D. | pitch curve |
| Answer» B. pitch circle | |