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Theory of Machine

Theory of Machine
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

1
-1
2

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Theory of Machine
Which of the below are inversions of slider crank mechanism?
1. Oscillating cylinder engine mechanism
2. Toggle mechanism
3. Radial cylinder engine mechanism
4. Quick return mechanism

1, 2 and 4
1, 3 and 4
2, 3 and 4
1, 2 and 3

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Theory of Machine
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a

Turning pair
Sliding pair
Screw pair
Spherical pair

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Theory of Machine
If the damping factor for a vibrating system is unity, then the system will be

Over damped
Critically damped
Under damped
Without vibrations

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Theory of Machine
Which of the following is a turning pair?

Lead screw of a lathe with nut
Ball and a socket joint
Shaft with collars at both ends fitted into a circular hole
Piston and cylinder of a reciprocating steam engine

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Theory of Machine
If some links are connected such that motion between them can take place in more than one direction, it is called

Successfully constrained motion
Incompletely constrained motion
Completely constrained motion
Partially constrained motion

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