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Theory of Machine

Theory of Machine
Davis steering gear consists of

Rolling pairs
Sliding pairs
Higher pairs
Turning pairs

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Theory of Machine
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is +ve and b is also +ve
a = 0 and b is +ve
a is +ve and b = 0
a is +ve and b is -ve

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Theory of Machine
The rotating shafts tend to vibrate violently at whirling speeds because

Resonance is caused due to the heavy mass of the rotor
The shafts are rotating at very high speeds
The system is unbalanced
Bearing centre line coincides with the axis

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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
________ 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
A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.

Greater than
Less than
Equal to
None of these

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