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Theory of Machine

Theory of Machine
A cam mechanism imparts following motion

All of these
Oscillating
Rotating
Reciprocating

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Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Lags by 90°
Are in phase
Leads by 180°
Leads by 90°

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Theory of Machine
The partial balancing means

All of these
Balancing partially revolving masses
Balancing partially reciprocating masses
Best balancing of engines

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Theory of Machine
Oldham’s coupling is an inversion of the kinematic chain used in

Rotary engine
Whitworth quick return mechanism
Elliptical trammels
Universal joint

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Theory of Machine
Rectangular bar in a rectangular hole is the following type of pair

Freely constrained motion
Completely constrained motion
Incompletely constrained motion
Partially constrained motion

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Theory of Machine
In a screw jack, the effort required to lower the load W is given by

P = W tan(α - φ)
P = W tan(φ - α)
P = W tan(α + φ)
P = W cos(α + φ)

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