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Theory of Machine

Theory of Machine
Peaucellier’s mechanism has

Twelve links
Six links
Eight links
Four links

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Theory of Machine
Efficiency of a screw jack is given by

tanα/tan (α +φ)
tanα/tan (α - φ)
tan (α + φ)/tanα
tan (α - φ)/tanα

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Theory of Machine
The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at

An infinite distance on the plane surface
The point of contact
The point on the circumference situated vertically opposite to the contact point
The center of the disc

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Theory of Machine
When a slider moves on a fixed link having curved surface, their instantaneous centre lies

At the pin joint
On their point of contact
At the centre of curvature
At the centre of circle

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Theory of Machine
The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is

At 45° to PO
Perpendicular to PO
Along PO
None of the listed here

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c/(m + M) g
c/(m - M) g
c (m + M) g
c (m - M) g

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