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Engineering Mechanics

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

43865
43832
43864
43892

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

0.6 r
0.8 r
0.5 r
0.7 r

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Engineering Mechanics
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

Principle of independence of forces
None of these
Principle of resolution of forces
Principle of transmissibility of forces

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

Move in any one direction rotating about itself
Rotate about itself without moving
Be completely at rest
All of these

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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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Engineering Mechanics
For a self locking machine, the efficiency must be

Greater than 50%
1
Less than 50%
Equal to 50%

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MORE MCQ ON Engineering Mechanics

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