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
D. The double centre can be denoted either by O2 or O12, but proper selection should be made
Along PO
Perpendicular to PO
At 45° to PO
None of the above
Radial component
Tangential component
Coriolis component
None of these
Zero
Minimum
Maximum
None of these
Fluctuation of speed
Maximum fluctuation of speed
Coefficient of fluctuation of speed
None of these
Balanced completely
Balanced partially
Balanced by secondary forces
Not balanced
60 to 80 r.p.m.
80 to 100 r.p.m.
100 to 200 r.p.m.
200 to 300 r.p.m.
Uniform velocity
Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Parallel to each other
Perpendicular to each other
Inclined at 45°
Opposite to each other
Four bar linkage
6 bar linkage
8 bar linkage
3 bar linkage
Piston, piston rod and crosshead
Connecting rod with big and small end brasses, caps and bolts
Crank pin, crankshaft and flywheel
All of the above
Compound gears
Worm and wheel method
Hooke's joint
Crown gear
ω (r₁ r₂) sinθ
ω (r₁ + r₂) sinθ sec2θ
ω (r₁ r₂) cosθ
ω (r₁ + r₂) cosθ cosec2θ
Screw pair
Spherical pair
Turning pair
Sliding pair
Knife edge follower
Flat faced follower
Spherical faced follower
Roller follower
Piston and cylinder of a reciprocating steam engine
Shaft with collars at both ends fitted into a circular hole
Lead screw of a lathe with nut
Ball and a socket joint
Fluctuation of energy
Maximum fluctuation of energy
Coefficient of fluctuation of energy
None of these
Increases
Decreases
Remain unaffected
First increases and then decreases
A point on the pitch curve having minimum pressure angle
A point on the pitch curve having maximum pressure angle
Any point on the pitch curve
Any point on the pitch circle
Same
Opposite
Perpendicular
None of these
Have line contact
Have surface contact
Permit relative motion
Are held together
Fc = ar + b
Fc = ar - b
Fc = ar
Fc = a/r + b
Damping factor
Damping coefficient
Logarithmic decrement
Magnification factor
Number of cycles per hour
Number of cycles per minute
Number of cycles per second
None of these
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
Knife edge follower
Flat faced follower
Spherical faced follower
Roller follower
Dedendum
Addendum
Clearance
Working depth
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
Watts mechanism
Grasshopper mechanism
Roberts mechanism
Peaucelliers mechanism
T₁/T₂ = μ. θ. n
T₁/T₂ = [(1 - μ tanθ)/(1 + μ tanθ)]n
T₁/T₂ = (μ θ)n
T₁/T₂ = [(1 + μ tanθ)/(1 - μ tanθ)]n
Fluctuation of energy
Maximum fluctuation of energy
Coefficient of fluctuation of energy
None of these