Classification of Kinematic Pairs

Question 1
Marks : +2 | -2
Pass Ratio : 100%
An automobile steering gear is an example of
sliding pair
rolling pair
lower pair
higher pair
Explanation:
None
Question 2
Marks : +2 | -2
Pass Ratio : 100%
A pair is said to be kinematic pair, if the relative motion between them is completely or successfully constrained.
True
False
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, the pair is known as kinematic pair.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is an example of higher pair?
Toothed gearing
Belt and rope drive
Ball and roller bearing
All of the mentioned
Explanation:
None
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The cam and follower is an example of
sliding pair
rolling pair
lower pair
higher pair
Explanation:
The cam and follower is an example of higher pair as it is kept in contact by the forces exerted by spring and gravity.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
When the connection between the two elements is such that only required kind of relative motion occurs, it is known as self-closed pair.
True
False
Explanation:
When the two elements of a pair are connected together mechanically in such a way that only required kind of relative motion occurs, it is then known as self closed pair.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
A pair of friction discs is an example of rolling pair.
True
False
Explanation:
A pair of discs are higher pairs as the motion is partly turning and partly sliding between them.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The lower pairs are ___________ pairs.
self-closed pair
force-closed pair
screw pair
none of the mentioned
Explanation:
When the two elements of a pair are connected together mechanically in such a way that only required kind of relative motion occurs, it is then known as self closed pair. The lower pairs are self closed pairs.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a higher pair?
Belt and pulley
Turning pair
Screw pair
Sliding pair
Explanation:
Belt and pulley are higher pairs as the motion is partly turning and partly sliding between them.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The pair is known as a higher pair, when the relative motion between the elements of a pair is
turning only
sliding only
rolling only
partly turning and partly sliding
Explanation:
When the two elements of a pair have a line or point contact when relative motion takes place and the motion between the two elements is partly turning and partly sliding, then the pair is known as higher pair.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
lower pair
higher pair
self-closed pair
force-closed pair
Explanation:
When the two elements of pair are not connected mechanically but are kept in contact by the action of external forces, the pair is said to be a forced-closed pair.