Theory of Machine
In elliptical trammels

Two pairs turning and two pairs sliding
One pair turning and three pairs sliding
All four pairs are turning
Three pairs turning and one pair sliding

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Open pairs are those which have

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

ANSWER DOWNLOAD EXAMIANS APP