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Engineering Mechanics

Engineering Mechanics
An ideal machine is one whose efficiency is

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

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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

sinθ
cosθ
cosecθ
tanθ

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. sinα/g
t = 2u/g.sinα
t = 2u. cosα/g
t = 2u. tanα/g

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Engineering Mechanics
A smooth cylinder lying on a __________ is in neutral equilibrium.

Horizontal surface
Convex surface
Curved surface
None of these

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Engineering Mechanics
If the gravitational acceleration at any place is doubled, then the weight of a body will be

g/2
2g
g
√2.g

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Engineering Mechanics
The point, through which the whole weight of the body acts, irrespective of its position, is known as

Moment of inertia
Center of mass
Center of percussion
Center of gravity

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MORE MCQ ON Engineering Mechanics

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