Pitch circle
Base circle
Pitch curve
Prime circle
C. Pitch curve
Velocity of various parts
Acceleration of various parts
Displacement of various parts
Angular acceleration of various parts
Point contact
Surface contact
No contact
None of the above
Not exist
Exist
Depend on position of crank
None of the above
4, 4
4, 5
5, 4
4, 6
Scott-Russell's mechanism
Hart's mechanism
Peaucellier's mechanism
All of these
Difference of minimum fluctuation of speed and the mean speed
Difference of the maximum and minimum speeds
Sum of maximum and minimum speeds
Variations of speed above and below the mean resisting torque line
10°
20°
30°
40°
At the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
The two rigid links have no linear velocities relative to each other at the instantaneous centre
The two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
The double centre can be denoted either by O2 or O12, but proper selection should be made
Lower pair
Higher pair
Turning pair
Sliding pair
Whitworth quick return mechanism
Hand pump
Oscillating cylinder engine
All of the above
Resultant force is equal to zero
Resultant couple is equal to zero
Resultant force and resultant couple are both equal to zero
Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero
Double slider crank chain
Elliptical trammel
Scotch yoke mechanism
All of these
ω²r. (n + 1)/n
ω²r. (n - 1)/n
ω²r. n/(n + 1)
ω²r. n/(n - 1)
Depends upon
Is independent of
Either A or B
None of these
Radial component only
Tangential component only
Coriolis component only
Radial and tangential components both
Zero
Less than one
Greater than one
Infinity
Open pair
Kinematic pair
Sliding pair
None of these
The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
All of the above
1
2
3
4
fn/2
2 fn
4 fn
8 fn
Velocity of slider
Angular velocity of the link
Both (A) and (B)
None of these
Gyroscope
Pantograph
Valve and valve gears
All of the above
Bulky
Wears rapidly
Difficult to manufacture
Both (A) and (B) above
9/8
9/82
9/16
9/128
Dedendum
Addendum
Clearance
Working depth
Turning only
Sliding only
Rolling only
Partly turning and partly sliding
r sinφ
r cosφ
r tanφ
(r/2) cosφ
Increases
Decreases
Remain unaffected
First increases and then decreases
Two elements held together mechanically
Two elements having relative motion
Two elements having Coriolis component
Minimum of two instantaneous centres
Critical damping ratio
Damping factor
Logarithmic decrement
Magnification factor