Theory of Machine
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.

Directly proportional to
Inversely proportional to
Independent of
Equal to

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Theory of Machine
In a four bar chain or quadric cycle chain

Three are turning pairs and one is a sliding pair
Two are turning pairs and two are sliding pairs
One is a turning pair and three are sliding pairs
Each of the four pairs is a turning pair

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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, if N coincides with O, then

Acceleration of the piston P is maximum and its velocity is zero
Acceleration and velocity of the piston P is zero
Acceleration of the piston P is zero and its velocity is maximum
Acceleration and velocity of the piston P is maximum

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Theory of Machine
Crowning on pulleys helps

Increase belt and pulley life
In decreasing the slip of the belt
In increasing velocity ratio
For automatic adjustment of belt position so that belt runs centrally

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