2
3
4
5
C. 4
Turning pair
Rolling pair
Screw pair
Spherical pair
No acceleration
Linear acceleration
Angular acceleration
Both angular and linear accelerations
ω² R cosθ
ω² (R - r₁) cosθ
ω² (R - r₁) sinθ
ω² r₁ sinθ
Point or line contact between the two elements when in motion
Surface contact between the two elements when in motion
Elements of pairs not held together mechanically
Two elements that permit relative motion
Machines transmit mechanical work, whereas structures transmit forces
In machines, relative motion exists between its members, whereas same does not exist in case of structures
Machines modify movement and work, whereas structures modify forces
Efficiency of machines as well as structures is below 100%
The friction force is dependent on the materials of the contact surfaces.
The friction force is directly proportional to the normal force.
The friction force is independent of me area of contact.
All of the above
Surface of the top of tooth
Surface of tooth above the pitch surface
Width of tooth below the pitch surface
Width of tooth measured along the pitch circle
Not exist
Exist
Depend on position of crank
None of the above
Ball and socket joint
Journal bearing
Lead screw and nut
Cam and follower
During which the follower returns to its initial position
Of rotation of the cam for a definite displacement of the follower
Through which, the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Oldham's coupling
Elliptical trammel
Scotch yoke mechanism
All of these
Upward
Downward
Forward
Backward
The centre of the disc
The point of contact
An infinite distance on the plane surface
The point on the circumference situated vertically opposite to the contact point
Completely constrained motion
Incompletely constrained motion
Successfully constrained motion
None of these
Straight line path
Hyperbolic path
Parabolic path
Elliptical path
Parallel to each other
Perpendicular to each other
Inclined at 45°
Opposite to each other
Less
More
Same
None of these
Increasing the spring stiffness
Decreasing the spring stiffness
Increasing the ball mass
Decreasing the ball mass
0
1
2
-1
Grasshopper mechanism
Watt mechanism
Peaucellier's mechanism
Tchebicheff mechanism
Less sensitive
More sensitive
Unaffected of sensitivity
Isochronous
Mass
Friction
Inertia
Resisting force
Whitworth quick return mechanism
Elliptical trammels
Rotary engine
Universal joint
(1/2π). √(kG/g)
(1/2π). √(2kG/g)
2π. √(kG/g)
2π. √(2kG/g)
Open pair
Kinematic pair
Sliding pair
None of these
More than
Less than
Same as
None of these
10°
14°
20°
30°
Base circle
Pitch circle
Prime circle
Pitch curve
tan (α + φ)/tanα
tanα/tan (α +φ)
tan (α - φ)/tanα
tanα/tan (α - φ)
In increasing velocity ratio
In decreasing the slip of the belt
For automatic adjustment of belt position so that belt runs centrally
Increase belt and pulley life