Theory of Machine
Higher pairs are those which have

Surface contact between the two elements when in motion
Point or line contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion

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Theory of Machine
A body is said to be under forced vibrations, when

There is a reduction in amplitude after every cycle of vibration
A body vibrates under the influence of external force
No external force acts on a body, after giving it an initial displacement
None of these

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Theory of Machine
The Klein's method of construction for reciprocating engine mechanism

Is based on acceleration diagram
Enables determination of Cariole’s component
Is a simplified form of instantaneous center method
Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine

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