273) Lower pairs are those which have
Answer is:
surface contact between the two elements when in motion
Related Theory of Machines MCQ with Answers
Answer is:
two elements that permit relative motion
Explanation:
The two links or elements of a machine, when in contact with each other, are said to form a pair. If the relative motion between them is completely or successfully constrained (i.e. in a definite direction), the pair is known as kinematic pair.
Answer is: