a is +ve and b = 0
a = 0 and b is +ve
a is +ve and b is -ve
a is +ve and b is also +ve
A. a is +ve and b = 0
Fc = ar + b
Fc = ar - b
Fc = ar
Fc = a/r + b
α = 45° + φ/2
α = 45° - φ/2
α = 90° + φ
α = 90° - φ
12
16
25
32
Maximum
Minimum
Zero
None of these
Is same as that of velocity
Is opposite to that of velocity
Could be either same or opposite to velocity
Is perpendicular to that of velocity
Length of pair of contact to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of approach to the circular pitch
Length of arc of recess to the circular pitch
Is in phase
Leads by 90°
Leads by 180°
Lags by 90°
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
Perpendicular to sliding surfaces
Along sliding surfaces
Somewhere in between above two
None of the above
Radial component only
Tangential component only
Coriolis component only
Radial and tangential components both
Zero
Minimum
Maximum
None of these
Crank has a uniform angular velocity
Crank has non-uniform velocity
Crank has uniform angular acceleration
Crank has uniform angular velocity and angular acceleration
3 Hz
3π Hz
6 Hz
6π Hz
Structure
Mechanism
Inversion
Machine
Base circle
Pitch circle
Prime circle
Pitch curve
Because of difficulty in manufacturing cam profile
Because of loose contact of follower with cam surface
In order to have acceleration in beginning and retardation at the end of stroke within the finite limits
Because the uniform velocity motion is a partial parabolic motion
The former is mathematically accurate
The former is having turning pair
The former is most economical
The former is most rigid
Linear displacement
Rotational motion
Gravitational acceleration
Tangential acceleration
Watts mechanism
Grasshopper mechanism
Roberts mechanism
Peaucelliers mechanism
Increases as the radius of rotation decreases
Increases as the radius of rotation increases
Decreases as the radius of rotation increases
Remain constant for all radii of rotation
1-3 m/s
3-15 m/s
15-30 m/s
30-50 m/s
(1/2).Iω²
Iω²
(1/2). I ω ωP
I ω ωP
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
l - 2
l - 1
l
l + 1
10°
20°
30°
40°
The algebraic sum of the secondary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
Both (A) and (B)
None of these
Permanent instantaneous centres
Fixed instantaneous centres
Neither fixed nor permanent instantaneous centres
None of the above
π (r₁ + r₂) + (r₁ + r₂)²/x + 2x
π (r₁ + r₂) + (r₁ - r₂)²/x + 2x
π (r₁ - r₂) + (r₁ - r₂)²/x + 2x
π (r₁ - r₂) + (r₁ + r₂)²/x + 2x
Below the critical speed
Near the critical speed
Above the critical speed
None of these
T = W.r tan(φ - α)
T = W.r tan(φ + α)
T = W.r tanα
T = W.r tanφ