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Engineering Mechanics

Engineering Mechanics
An ideal machine is one whose efficiency is

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

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Engineering Mechanics
The total energy possessed by a system of moving bodies

Is maximum in the start and minimum at the end
Is minimum in the start and maximum at the end
Varies from point to point
Is constant at every instant

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Engineering Mechanics
The velocity ratio for the third system of pulleys is

2n
n
n²
2n - 1

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Engineering Mechanics
Mass moment of inertia of a thin rod about its one end is ___________ the mass moment of inertia of the same rod about its mid-point

Four times
Thrice
Same as
Twice

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Engineering Mechanics
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

2 m
1 m
3 m
4 m

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Engineering Mechanics
The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Unlike parallel forces
Coplanar concurrent forces
Like parallel forces
Coplanar non-concurrent forces

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