The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ + ω₂)r

ω₁.ω₂.r

(ω₁ - ω₂)r

(ω₁ - ω₂)2r

(ω₁ + ω₂)r

ω₁.ω₂.r

(ω₁ - ω₂)r

(ω₁ - ω₂)2r

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Theory of Machine
Tangential acceleration direction is

Perpendicular to angular velocity

Along the angular velocity

May be any one of these

Opposite to angular velocity

Perpendicular to angular velocity

Along the angular velocity

May be any one of these

Opposite to angular velocity

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Theory of Machine
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Less sensitive

Unaffected of sensitivity

Isochronous

More sensitive

Less sensitive

Unaffected of sensitivity

Isochronous

More sensitive

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Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Two times

Eight times

Four times

Sixteen times

Two times

Eight times

Four times

Sixteen times

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Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

2π. √(q/I)

2π qI

1/2π

(1/2π). √(q/I)

2π. √(q/I)

2π qI

1/2π

(1/2π). √(q/I)

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Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Equal to 2

Greater than 2

Less than 2

Equal to 1

Equal to 2

Greater than 2

Less than 2

Equal to 1

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Theory of Machine

Theory of Machine Tangential acceleration direction is

Theory of Machine In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Theory of Machine The secondary unbalanced force is maximum __________ in one revolution of the crank.

Theory of Machine The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

Theory of Machine In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Theory of Machine
Tangential acceleration direction is

Theory of Machine
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Theory of Machine
The secondary unbalanced force is maximum __________ in one revolution of the crank.

Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is