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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.

Less than
More than
Equal to
None of these

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Engineering Mechanics
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

0.6 r
0.8 r
0.5 r
0.7 r

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Engineering Mechanics
The maximum efficiency of a lifting machine is

V.R./m
1/m
1/(m × V.R.)
m/V.R.

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Engineering Mechanics
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.

Equal to
Less than
None of These
More than

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Engineering Mechanics
Moment of inertia of a circular section about an axis perpendicular to the section is

πd3/16
πd4/64
πd3/32
πd4/32

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Engineering Mechanics
Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Meet
Do not meet
Either ‘A’ or ‘B’
None of these

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