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Engineering Mechanics

Engineering Mechanics
The unit of moment of inertia of an area is

m4
kg-m-s2
kg/m2
kg-m2

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Engineering Mechanics
If n = number of members and y = number of joints, then for a perfect frame, n = ?

43865
43864
43892
43832

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Engineering Mechanics
A smooth cylinder lying on its convex surface remains in __________ equilibrium.

None of these
Neutral
Unstable
Stable

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α - φ)/tanα
tanα/tan (α + φ)
tan(α + φ)/tanα
None of these

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Engineering Mechanics
The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

Limiting friction
Coefficient of friction
Dynamic friction
Static friction

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

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MORE MCQ ON Engineering Mechanics

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