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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a solid cylinder of mass 'm', radius 'r' and length 'l' about the longitudinal axis or polar axis is

mr²/4
mr²/2
mr²/6
mr²/8

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Engineering Mechanics
The velocity ratio of a differential wheel and axle with 'D' as the diameter of effort wheel and d1 and d2 as the diameters of larger and smaller axles respectively, is

D/(d₁ + d₂)
D/(d₁ - d₂)
2D/(d₁ - d₂)
2D/(d₁ + d₂)

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Engineering Mechanics
The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

45° + β/2
β/2
30° + β/2
60° + β/2

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

erg
kg-m
joule
Newton

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

All of these
Mechanical advantage to the velocity ratio
Output to the input
Work done by the machine to the work done on the machine

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Engineering Mechanics
A force while acting on a body may

Change its motion
Give rise to the internal stresses in it
All of these
Balance the forces, already acting on it

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MORE MCQ ON Engineering Mechanics

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