1. |
The balancing of rotating and reciprocating parts of an engine is necessary when it runs at
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Answer:
Option (c) |
2. |
The static balancing is satisfactory for low-speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because the
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Answer:
Option (c) |
3. |
A system in dynamic balance implies that
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Answer:
Option (c) |
4. |
A disturbing mass m1 attached to a rotating shaft may be balanced by a single mass m2 attached in the same plane of rotation as that of m1 such that
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Answer:
Option (b) |
5. |
For dynamic balancing of a shaft,
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Answer:
Option (c) |
6. |
In order to have a complete balance of the several revolving masses in different planes
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Answer:
Option (c) |
7. |
Often an unbalance of forces is produced in rotary or reciprocating machinery due to the ______.
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Answer:
Option (d) |
8. |
Which of the following is true for centrifugal force causing unbalance?
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Answer:
Option (a) |
9. |
In a revolving rotor, the centrifugal force remains balanced as long as the center of the mass of the rotor lies ___________.
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Answer:
Option (b) |
10. |
What is the effect of a rotating mass of a shaft on a system?
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Answer:
Option (a) |