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Theory of Machine

Theory of Machine
If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

360°
180°
0°
90°

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

ωr₁ sinθ
ω(R - r₁) cosθ
ω(R - r₁) sinθ
ωR cosθ

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Theory of Machine
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is

Fc = ar - b
Fc = ar + b
Fc = ar
Fc = a/r + b

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Theory of Machine
A rotary internal combustion engine has __________ cylinders.

Six
Four
Five
Seven

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Theory of Machine
Under logarithmic decrement, the amplitude of successive vibrations are

In geometric progression
In arithmetic progression
Constant
In logarithmic progression

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Kinematically sound
Not sound
Soundness would depend upon which link is kept fixed
Data is not sufficient to determine same

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