11. |
Let the disturbing mass be 100 kg and the radius of rotation be 20 cm and the rotation speed is 50 rad/s, then calculate the centrifugal force in kN.
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Answer:
Option (a) |
12. |
For the static balancing of the engine, which of the condition is necessary?
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Answer:
Option (a) |
13. |
Which of the following statements are associated with the complete dynamic balancing of rotating systems? 1. Resultant couple due to all inertia forces is zero. 2. Support reactions due to forces are zero but not due to couples. 3. The system is automatically statically balanced. 4. Centre of masses of the system lies on the axis of rotation.
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Answer:
Option (d) |
14. |
The unbalanced primary forces in rotating parts are partially balanced
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Answer:
Option (b) |
15. |
Cradle type balancing machine is a more sensitive machine than the pendulum type balancing machine.
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Answer:
Option (a) |
16. |
Two correction planes (left and right) are used in Pivoted-cradle balancing machine to measure unbalance in the rotating part.
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Answer:
Option (a) |