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

_{c} = ar + b

_{c} = ar - b

_{c} = ar

_{c} = 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

_{P}

_{P}

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