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Engineering Mechanics

Engineering Mechanics
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

Less than
Greater than
None of these
Equal to

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Engineering Mechanics
Center of gravity of a thin hollow cone lies on the axis at a height of

Three-eighth of the total height above the base
One-third of the total height above base
One-half of the total height above base
One-fourth of the total height above base

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Engineering Mechanics
The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.

Greater than
Less than
Equal to
None of these

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

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

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Engineering Mechanics
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of

r/A
r/2
0.134 r
r/3

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Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 + m
m
1 / m
1 - m

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