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Engineering Mechanics

Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

More than
Equal to
None of these
Less than

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Engineering Mechanics
A smooth cylinder lying on its convex surface remains in __________ equilibrium.

Neutral
Unstable
Stable
None of these

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Engineering Mechanics
The resultant of the two forces ‘P’ and ‘Q’ is ‘R’. If ‘Q’ is doubled, the new resultant is perpendicular to ‘P’. Then

None of the listed here
Q = R
P = Q
Q = 2R

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Engineering Mechanics
When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.

Outward
Towards back
Towards front
Inward

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Engineering Mechanics
The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

L/3
L/2
2L/3
3L/4

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

The midpoint of its axis
The bottom surface
All of these
The centre of heavy portion

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