Theory of Machine
Which of the following is a spring controlled governor?

Hartnell governor
All of these
Hartung governor
Wilson-Hartnell governor

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Theory of Machine
In a four bar chain or quadric cycle chain

Each of the four pairs is a turning pair
Three are turning pairs and one is a sliding pair
One is a turning pair and three are sliding pairs
Two are turning pairs and two are sliding pairs

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Theory of Machine
Lower pairs are those which have

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

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