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Theory of Machine

Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

None of these
Halved
Doubled
Quadrupled

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

More sensitive
Isochronous
Less sensitive
Unaffected of sensitivity

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Theory of Machine
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.

More than
None of these
Same as
Less than

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Theory of Machine
A shaft carrying two rotors at its ends will have

One node
No node
Two nodes
Three nodes

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Theory of Machine
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line

Perpendicular to line as per (A)
Not possible to determine with these data
At 45° to line as per (A)
Joining the corresponding points

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Theory of Machine
The factional torque for square thread at the mean radius r while raising load W is given by

T = W.r tanα
T = W.r tanφ
T = W.r tan(φ + α)
T = W.r tan(φ - α)

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