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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

40
5
10
20

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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 rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

Less inclined when standing
More inclined when moving
Less inclined when moving
More inclined when standing

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Engineering Mechanics
In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

P = W tan (α + φ)
P = W tan (φ - α)
P = W cos (α + φ)
P = W tan (α - φ)

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Engineering Mechanics
Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

None of these
15 N and 15 N
20 N and 5 N
15 N and 5 N

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Engineering Mechanics
The velocity ratio in case of an inclined plane inclined at angle 'θ' to the horizontal and weight being pulled up the inclined plane by vertical effort is

cosθ
cosecθ
sinθ
tanθ

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MORE MCQ ON Engineering Mechanics

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