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Engineering Mechanics

Engineering Mechanics
The moment of inertia of a thin rod of mass 'm' and length 'l', about an axis through its centre of gravity and perpendicular to its length is

ml2/ 6
ml2/8
ml2/4
ml2/12

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Engineering Mechanics
The centre of gravity of a right circular solid cone is at a distance of _________ from its base, measured along the vertical axis.(where h = Height of a right circular solid cone.)

h/2
h/4
h/6
h/3

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Engineering Mechanics
An ideal machine is one whose efficiency is

Between 60 and 70 %
Between 80 and 90%
1
Between 70 and 80%

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Engineering Mechanics
The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of α rad/s2, is

a = α/ r
a = r / α
None of these
a = α.r

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Engineering Mechanics
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be

Perpendicular to the wall at its upper end
Downwards at its upper end
Zero at its upper end
Upwards at its upper end

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Engineering Mechanics
A machine having an efficiency less than 50%, is known as

Reversible machine
Ideal machine
Neither reversible nor non-reversible machine
Non-reversible machine

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MORE MCQ ON Engineering Mechanics

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