The crank shaft turning in a journal
bearing forms a :
Turning pair
Sliding pair
Rolling pair
Helical pair
Turning pair
●Crank shaft turning in a journal
bearing forms a turning pair, because shaft rotates inside a fixed link
(bearing).
●When one link has a turning or revolving motion relative to the other, they constitute a turningor revolving pair.
Hence, the correct option is (A).
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