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Theory of Machine

Theory of Machine
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be

None of these
Zero
Minimum
Maximum

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Theory of Machine
The axis of precession is __________ to the plane in which the axis of spin is going to rotate.

Both A and B
Perpendicular
None of these
Parallel

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Theory of Machine
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)

ω × (AB)²
ω × AB
ω² × AB
(ω × AB)²

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Theory of Machine
Klein's construction gives a graphic construction for

Four bar chain mechanism
Acceleration polygon
Velocity polygon
Slider-crank mechanism

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Theory of Machine
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

ω² r {(n + 1)/n}
ω² r {n/(n + 1)}
ω² r {n/(n - 1)}
ω² r {(n - 1)/n}

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be

45 mm
Slightly more than 45 mm
95 mm
Slightly less than 45 mm

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