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Engineering Mechanics

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

πd3/32
πd4/32
πd4/64
πd3/16

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Engineering Mechanics
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of

r/A
r/3
r/2
0.134 r

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

2πN/180
2πN/60
πN/60
πN/180

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Engineering Mechanics
A body of weight 'W' is required to move up on rough inclined plane whose angle of inclination with the horizontal is 'α'. The effort applied parallel to the plane is given by (where μ = tanφ = Coefficient of friction between the plane and the body.)

P = W (sinα + μcosα)
P = W (cosα + μsinα)
P = W tanα
P = W tan (α + φ)

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Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Both of above are correct
Equal to the moment of the couple
Constant
Both of above are wrong

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Engineering Mechanics
The coefficient of friction depends upon

Nature of surfaces
Shape of the surfaces
All of these
Area of contact

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MORE MCQ ON Engineering Mechanics

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