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Theory of Machine

Theory of Machine
Cross head and guides form a

Turning pair
Higher pair
Lower pair
Sliding pair

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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 cosθ
W tanθ
W sinθ
W cosecθ

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Theory of Machine
The locus of a point on a thread unwound from a cylinder will be

Cycloidal
A circle
A straight line
Involute

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Theory of Machine
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to

To start the locomotive quickly
Have perfect balancing
Minimize the effect of primary forces
Minimize the effect of secondary forces

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Theory of Machine
The angle of inclination of the plane, at which the body begins to move down the plane is called

Angle of repose
Angle of projection
None of these
Angle of friction

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Theory of Machine
Which one of the following is an exact straight line mechanism using lower pairs?

Robert’s mechanism
Peaucellier’s mechanism
Grasshopper mechanism
Watt’s mechanism

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