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Theory of Machine

Theory of Machine
Hart mechanism has

Eight links
Six links
Four links
Twelve links

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Theory of Machine
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is

180°
270°
90°
0°

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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 minimum length of the coupler will be

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

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Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

Is at rest
Is in motion
Just begins to slide over the surface of the other body
None of these

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Theory of Machine
Oldham’s coupling is an inversion of the kinematic chain used in

Rotary engine
Whitworth quick return mechanism
Universal joint
Elliptical trammels

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Theory of Machine
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.

Greater than
Less than
Equal to
None of these

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