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Engineering Mechanics

Engineering Mechanics
A redundant frame is also called __________ frame.

Deficient
Perfect
Imperfect
None of these

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Engineering Mechanics
Work done is said to be zero, when

Some force acts on a body, but displacement is zero
None of these
Either (A) or (B)
No force acts on a body but some displacement takes place

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

400
200
50
100

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Engineering Mechanics
The range of projectile on a downward inclined plane is ________ the range on upward inclined plane for the same velocity of projection and angle of projection.

More than
Equal to
Less than
None of These

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Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² cosα/g
R = u² sin2α/g
R = u² sinα/g
R = u² cos2α/g

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Engineering Mechanics
The C.G. of a solid hemisphere lies on the central radius 3r

At distance — from the plane base 3r
At distance — from the plane base
At distance — from the plane base 3r
At distance — from the plane base 3r

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