Related Questions

The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as
A turning pair
B rolling pair
C sliding pair
D spherical pair
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
A lower pair
B higher pair
C self-closed pair
D force-closed pair
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a
A structure
B mechanism
C kinematic chain
D inversion
The pair is known as a higher pair, when the relative motion between the elements of a pair is
A turning only
B sliding only
C rolling only
D partly turning and partly sliding
The example of successfully constrained motion is a
A motion of an I.C. engine valve
B motion of the shaft between a foot-step bearing
C piston reciprocating inside an engine cylinder
D all of the mentioned
A completely constrained motion can be transmitted with.
A 1 link with pin joints
B 2 links with pin joints
C 3 links with pin joints
D 4 links with pin joints
The example of completely constrained motion is a
A Motion of a piston in the cylinder of a steam engine
B Motion of a square bar in a square hole
C Motion of a shaft with collars at each end in a circular hole
D All of the above
If a part is constrained to move and heated, it will develop
A Principal stress
B Tensile stress
C Compressive stress
D Shear stress
When the two elements of a pair have __________ when in motion, it is said to a lower pair.
A Line or point contact
B Surface contact
C Body contact
D None of these
The point about which combined motion of rotation and translation of a rigid body takes place, is known as
A Virtual centre
B Instantaneous centre
C Instantaneous axis
D Point of rotation

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