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Theory of Machine

Theory of Machine
V-belts are usually used for

Long drives
Long and short drives
None of these
Short drives

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Theory of Machine
The Coriolis component of acceleration exists whenever a point moves along a path that has

Rotational motion
Tangential acceleration
Gravitational acceleration
Linear displacement

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Theory of Machine
When the sleeve of a Porter governor moves downwards, the governor speed

Remain unaffected
First increases and then decreases
Increases
Decreases

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Theory of Machine
The maximum or minimum value of the swaying couple is

± 2a (1 - c) m.ω².r
± a (1 - c) m.ω².r
± (a/√2) (1 - c) m.ω².r
± c.m.ω².r

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

Slightly less than 95 mm
Slightly more than 95 mm
45 mm
95 mm

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0. If the roots of this equation are real, then the system will be

Without vibrations
Critically damped
Under damped
Over-damped

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