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Engineering Mechanics

Engineering Mechanics
A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

5
20
40
10

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Engineering Mechanics
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

Away from the wall at its upper end
Upward at its upper end
Towards the wall at its upper end
Downward at its upper end

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

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Engineering Mechanics
A screw jack used for lifting the loads is

An ideal machine
None of these
A non-reversible machine
A reversible machine

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Engineering Mechanics
Concurrent forces are those forces whose lines of action

Meet at one point
None of these
Lie on the same line
Meet on the same plane

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Engineering Mechanics
The unit of work in S.I. units is

Newton
erg
kg-m
joule

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MORE MCQ ON Engineering Mechanics

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