A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

Theory of Machine
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

3.0 mm

2 mm

2.22 mm

2.50 mm

3.0 mm

2 mm

2.22 mm

2.50 mm

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Theory of Machine
For dynamic balancing of a shaft

Both (A) and (B)

The net couple due to the dynamic forces acting on the shaft is equal to zero

The net dynamic force acting on the shaft is equal to zero

None of these

Both (A) and (B)

The net couple due to the dynamic forces acting on the shaft is equal to zero

The net dynamic force acting on the shaft is equal to zero

None of these

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

(1/2) μ W R

(2/3) μ W R

μ W R

(3/4) μ W R

(1/2) μ W R

(2/3) μ W R

μ W R

(3/4) μ W R

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Theory of Machine
If the pressure angle is __________, a reciprocating follower will jam in its bearings.

Small

Large

Too large

Too small

Small

Large

Too large

Too small

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Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

Four binary joints

Three binary joints

One binary joint

Two binary joints

Four binary joints

Three binary joints

One binary joint

Two binary joints

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W tanθ

W cosθ

W cosecθ

W sinθ

W tanθ

W cosθ

W cosecθ

W sinθ

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Theory of Machine

Theory of Machine For dynamic balancing of a shaft

Theory of Machine The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

Theory of Machine If the pressure angle is __________, a reciprocating follower will jam in its bearings.

Theory of Machine In a kinematic chain, a quaternary joint is equivalent to

Theory of Machine The minimum force required to slide a body of weight W on a rough horizontal plane is

Theory of Machine
For dynamic balancing of a shaft

Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

Theory of Machine
If the pressure angle is __________, a reciprocating follower will jam in its bearings.

Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is