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Theory of Machine

Theory of Machine
Davis steering gear consists of

Turning pairs
Sliding pairs
Rolling pairs
Higher pairs

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Theory of Machine
The factional torque for square thread at the mean radius r while raising load W is given by

T = W.r tanα
T = W.r tan(φ - α)
T = W.r tanφ
T = W.r tan(φ + α)

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Theory of Machine
The minimum force required to slide a body of weight W on a rough horizontal plane is

W tanθ
W sinθ
W cosecθ
W cosθ

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Theory of Machine
Transmission angle is the angle between

Output link and coupler
Input link and coupler
Output link and fixed link
Input link and fixed link

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Theory of Machine
If the number of links in a mechanism is equal to l, then the numbers of possible inversions are equal to

l + 1
l - 1
l - 2
l

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Theory of Machine
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be

Stable
Isochronous
Unstable
None of the listed here

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