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Engineering Mechanics

Engineering Mechanics
A screw jack used for lifting the loads is

None of these
An ideal machine
A non-reversible machine
A reversible machine

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

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Engineering Mechanics
The ideal angle of banking provided on the curves on roads depends upon

Coefficient of friction between the road and vehicle contact point
(Velocity)2 of the vehicle
Nature of the road surface
Weight of the vehicle

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Engineering Mechanics
The maximum efficiency of a lifting machine is

V.R./m
m/V.R.
1/m
1/(m × V.R.)

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Engineering Mechanics
The moment of inertia of a sphere of mass 'm' and radius 'r', about an axis tangential to it, is

7mr²/3
7mr²/5
2mr²/3
2mr²/5

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Engineering Mechanics
For a self locking machine, the efficiency must be

Less than 50%
Greater than 50%
1
Equal to 50%

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MORE MCQ ON Engineering Mechanics

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