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Engineering Mechanics

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

0.7 r
0.6 r
0.5 r
0.8 r

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P sinθ/2
2P tanθ/2
2P cotθ/2
2P cosθ/2

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Engineering Mechanics
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

Greater than
Equal to
Less than
None of these

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Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

7mr²/3
2mr²/3
2mr²/5
7mr²/5

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Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D + d
D - d
D / d
D × d

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

All of these
Work done by the machine to the work done on the machine
Mechanical advantage to the velocity ratio
Output to the input

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MORE MCQ ON Engineering Mechanics

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