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Theory of Machine

Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.8
0.6
0.2
0.4

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Theory of Machine
Scotch yoke mechanism is used to generate

Logarithms
Sine functions
Square roots
Inversions

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Theory of Machine
The factor which affects the critical speed of a shaft is

Diameter of disc
Eccentricity
All of the listed here
Span of shaft

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Theory of Machine
A Hartnell governor is a

Spring loaded governor
Inertia governor
Pendulum type governor
Dead weight governor

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W cosθ
W cosecθ
W tanθ
W sinθ

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Theory of Machine
When a slider moves on a fixed link having curved surface, their instantaneous centre lies

On their point of contact
At the pin joint
At the centre of circle
At the centre of curvature

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