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Engineering Mechanics

Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

2D/(D - d)
D/(D - d)
D/(D + d)
2D/(D + d)

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Engineering Mechanics
An ideal machine is one whose efficiency is

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

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Engineering Mechanics
A redundant frame is also called __________ frame.

Imperfect
Deficient
Perfect
None of these

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Engineering Mechanics
The unit of moment of inertia of an area is

m4
kg/m2
kg-m2
kg-m-s2

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Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Less than
None of these
More than
Equal to

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Engineering Mechanics
The motion of a particle round a fixed axis is

Rotary
Translatory as well as rotary
Translatory
Circular

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