1. A slider moves at a velocity v on a link revolving at ωrad/s. The coriolis component of acceleration is
a) ωv
b) 2ωv
c) ω2v
d) 2ωv2
Explanation: 2ωv
2. The coriolis component of acceleration leads the sliding velocity by
a) 450
b) 900
c) 1350
d) 1800
Explanation: The direction of coriolis component of acceleration is obtained by rotating v, at 90°, about its origin in the same direction as that of ω.
3. The sense of coriolis component 2ωv is same as that of the relative velocity vector v rotated at
a) 450 in the direction of rotation of the link containing the path
b) 450in the direction opposite to the rotation of the link containing the path
c) 900 in the direction of rotation of the link containing the path
d) 1800in the direction opposite to the rotation of the link containing the path
Explanation: The direction of coriolis component of acceleration is obtained by rotating v, at 90°, about its origin in the same direction as that of ω.
4. Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and motion of the parts?
a) theory of machines
b) applied mechanics
c) kinematics
d) kinetics
Explanation: The study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.
The study of relative motion between the parts of a machine is called kinematics.
The study of the relative motion between the parts of a machine and the forces acting on the parts is called theory of machines.
5. Which of the following disciplines provides study of relative motion between the parts of a machine?
a) theory of machines
b) applied mechanics
c) kinematics
d) kinetics
Explanation: The study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.
The study of relative motion between the parts of a machine is called kinematics.
The study of the relative motion between the parts of a machine and the forces acting on the parts is called theory of machines.
6. Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts?
a) theory of machines
b) applied mechanics
c) kinematics
d) kinetics
Explanation: he study of inertia forces arising from the combined effect of the mass and motion of the parts is called kinetics.
The study of relative motion between the parts of a machine is called kinematics.
The study of the relative motion between the parts of a machine and the forces acting on the partsis called theory of machines.
7. Which of the following is a lower pair?
a) ball and socket
b) piston and cylinder
c) cam and follower
d) 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.
8. If two moving elements have surface contact in motion, such pair is known as
a) sliding pair
b) rolling pair
c) surface pair
d) 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.
9.The example of lower pair is
a) shaft revolving in a bearing
b) straight line motion mechanisms
c) automobile steering gear
d) all of the mentioned
Explanation: In all the mentioned elements there is surface contact between the two elements. Hence, they form a lower pair.
10. Pulley in a belt drive acts as
a) cylindrical pair
b) turning pair
c) rolling pair
d) 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