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Theory of Machine

Theory of Machine
The critical speed of a shaft depends upon its

Stiffness and eccentricity
Mass and stiffness
Mass
Stiffness

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Theory of Machine
The periodic time of one oscillation for a simple pendulum is

2π. √(g/l)
2π. √(l/g)
(1/2π). √(g/l)
(1/2π). √(l/g)

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Theory of Machine
Which of the following mechanism is obtained from lower pair?

Gyroscope
All of these
Pantograph
Valve and valve gears

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Theory of Machine
For fluctuating loads, well suited bearing is

Ball bearing
Thrust bearing
Needle roller bearing
Roller bearing

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Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Equal to 2
Equal to 1
Less than 2
Greater than 2

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Theory of Machine
The number of centers in a crank driven slider crank mechanism is

6
2
4

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