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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd4/32
πd3/32
πd4/64
πd3/16

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Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

First
Second
None of these
Third

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is constant at every instant
Varies from point to point
Is maximum in the start and minimum at the end
Is minimum in the start and maximum at the end

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Engineering Mechanics
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

Non-reversible
Reversible
None of these
Ideal

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Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

40 N
20 N
120 N
None of the listed here

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Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

Convex surface
Curved surface
None of these
Horizontal surface

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