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Theory of Machine

Theory of Machine
If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to

l - 1
l - 2
l
l + 1

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Theory of Machine
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as

Damping coefficient
Damping factor
Logarithmic decrement
Magnification factor

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

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

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Theory of Machine
The Bifilar suspension method is used to determine

Centripetal acceleration
Moment of inertia
Natural frequency of vibration
Position of balancing weights

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Theory of Machine
Which of the following mechanism is an approximate straight line motion mechanism?

Grasshopper mechanism
All of these
Robert's mechanism
Watt's mechanism

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Theory of Machine
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

8 fn
fn/2
2 fn
4 fn

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