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Theory of Machine

Theory of Machine
Throw of a cam is the maximum distance of the follower from

Pitch circle
Prime circle
Base circle
Root circle

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Theory of Machine
________ is an inversion of Double slider crank chain.

Coupling rod of a locomotive
Hand pump
Reciprocating engine
Scotch yoke mechanism

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Theory of Machine
The Kutzbach criterion for determining the number of degrees of freedom (n) is (where l = number of links, j = number of joints and h = number of higher pairs)

n = 2(l - 1) - 3j - h
n = 2(l - 1) - 2j - h
n = 3(l - 1) - 2j - h
n = 3(l - 1) - 3j - h

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Theory of Machine
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than

1
0.25
2
0.5

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Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

Stable
Unstable
None of these
Isochronous

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Theory of Machine
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by

ω² × QN
ω² × NO
ω² × CO
ω² × CN

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