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 anticlockwise 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 anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂) 2r

(ω₁ - ω₂) r

(ω₁ + ω₂) r

ω₁.ω₂.r

(ω₁ - ω₂) 2r

(ω₁ - ω₂) r

(ω₁ + ω₂) r

ω₁.ω₂.r

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Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

(r₁ - r₂) (y/x)

(r₁ + r₂) (y/x)

(r₁ - r₂) (x/y)

(r₁ + r₂) (x/y)

(r₁ - r₂) (y/x)

(r₁ + r₂) (y/x)

(r₁ - r₂) (x/y)

(r₁ + r₂) (x/y)

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Theory of Machine
A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

ω²v

2ωv

ωv

2ωv²

ω²v

2ωv

ωv

2ωv²

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Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

P = W cos(α + φ)

P = W tan(φ - α)

P = W tan(α + φ)

P = W tan(α - φ)

P = W cos(α + φ)

P = W tan(φ - α)

P = W tan(α + φ)

P = W tan(α - φ)

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Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

34

20

10

30

34

20

10

30

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.

Same

None of these

More

Less

Same

None of these

More

Less

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Theory of Machine

Theory of Machine In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

Theory of Machine A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

Theory of Machine In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

Theory of Machine Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

Theory of Machine The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.

Theory of Machine
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

Theory of Machine
A slider moves at a velocity v on a link revolving at ω rad/s. The coriolis component of acceleration is

Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

Theory of Machine
The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.