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Engineering Mechanics

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

m
1 + m
1 - m
1 / m

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/6
mr²/4
mr²/8
mr²/2

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Engineering Mechanics
If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

Greater than
Less than
Equal to
None of these

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

None of these
Equal to
More than
Less than

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Engineering Mechanics
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

60°
30°
90°
120°

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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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MORE MCQ ON Engineering Mechanics

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