Theory of Machines

11. A foot step bearing and rotor of a vertical turbine form examples of

1. incompletely constrained motion
2. partially constrained motion
3. completely constrained motion
4. successfully constrained motion
5. none of the above.

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12. A kinematic chain requires at least

1. 2 links and 3 turning pairs
2. 3 links and 4 turning pairs
3. 4 links and 4 turning pairs
4. 5 links and 4 turning pairs
5. none of the above.

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13. A mechanism is an assemblage of

1. two links
2. three links
3. four links or more than four links
4. all of the above
5. none of the above.

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14. A pantograph is a mechanism with

1. lower pairs
2. higher pairs
3. rolling pairs
4. turning pairs
5. spherical pairs.

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15. A point on a link connecting double slider crank chain traces a

1. straight line
2. circle
3. parabola
4. hyperbola
5. ellipse.

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16. A slider crank chain consists of following numbers of turning and sliding pairs

1. I, 3
2. 2, 2
3. 3, 1
4. 4, 0
5. 0, 4.

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17. A universal joint is an example of

1. higher pair
2. lower pair
3. rolling pair
4. sliding pair
5. turning pair.

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18. According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on

1. a triangle
2. a point
3. two lines
4. a straight line
5. a curve.

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19. Ackermann steering gear consists of

1. sliding pairs
2. turning pairs
3. rolling pairs
4. higher pairs
5. lower pairs.

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20. An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has

1. 2 links
2. 3 links
3. 4 links
4. 5 links
5. none of the above.

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