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Theory of Machine

Theory of Machine
The amplitude of vibration is always __________ the radius of the circle.

Greater than
None of these
Equal to
Less than

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Theory of Machine
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to

G².I₂
I₂/G²
G.I₂
I₂/G

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Theory of Machine
Flexible coupling is used because

It prevents shock transmission and eliminates stress reversals
It is easy to engage and disengage
It transmits shocks gradually
It is easy to disassemble

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Theory of Machine
The swaying couple is due to the

Primary unbalanced force
Two cylinders of locomotive
Secondary unbalanced force
Partial balancing

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² (R - r₁) cosθ
ω² R cosθ
ω² r₁ sinθ
ω² (R - r₁) sinθ

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Theory of Machine
At the nodal point in a shaft, the amplitude for torsional vibration will be

Infinity
Zero
Maximum
Minimum

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