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Theory of Machine

Theory of Machine
If the opposite links of a four bar linkage are equal, the links will always form a

Triangle
Rectangle
Parallelogram
Pentagon

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

More
Less
None of the listed here
Same

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G.I₂
G².I₂
I₂/G
I₂/G²

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

Both governors A and B are equally sensitive
None of these
Governor B is more sensitive than governor A
Governor A is more sensitive than governor B

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

(1/2) μ W R cosecα
(2/3) μ W R cosecα
μ W R cosecα
(3/4) μ W R cosecα

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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

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