Machine Kinematics

Relation Between Linear Motion and Angular Motion

Question 1
Marks : +2 | -2
Pass Ratio : 100%
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
turning pair
rolling pair
sliding pair
spherical pair
Explanation:
When two elements of a pair are connected in such a way that one can only turn or revolve about a fixed axis of another link, the pair is known as turning pair.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
The example of rolling pair is
bolt and nut
lead screw of a lathe
ball and socket joint
ball bearing and roller bearing
Explanation:
In ball bearing and roller bearing one element rolls over the other element. Hence, they are examples of rolling pair.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Any point on a link connecting double slider crank chain will trace a
straight line
circle
ellipse
parabola
Explanation:
One of the inversions of a double slider crank chain is elliptical trammels. So, from the above given options ellipse is best suited.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The example of lower pair is
shaft revolving in a bearing
straight line motion mechanisms
automobile steering gear
all of the mentioned
Explanation:
In all the mentioned elements there is surface contact between the two elements. Hence, they form a lower pair.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Pulley in a belt drive acts as
cylindrical pair
turning pair
rolling pair
sliding pair
Explanation:
When the two elements of a pair are connected in such a way that one rolls over another fixed link, the pair is known as rolling pair. In belt and pulley, the belt rolls over the pulley.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts?
theory of machines
applied mechanics
kinetics
Explanation:
The study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a lower pair?
ball and socket
piston and cylinder
cam and follower
both a and b
Explanation:
In both ball and socket and piston cylinder there is surface contact between the two elements. Hence, they form a lower pair.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and motion of the parts?
theory of machines
applied mechanics
kinetics
Explanation:
The study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
If two moving elements have surface contact in motion, such pair is known as
sliding pair
rolling pair
surface pair
lower pair
Explanation:
when 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 lower pair.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following disciplines provides study of relative motion between the parts of a machine?
theory of machines
applied mechanics
kinetics
Explanation:
The study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.