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Engineering Mechanics

Engineering Mechanics
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

Equal to
Greater than
None of these
Less than

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Engineering Mechanics
The periodic time of one oscillation for a simple pendulum is (where l = Length of the pendulum.)

(1/2π). √(l/g)
2π. √(l/g)
(1/2π). √(g/l)
None of these

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

All of these
Work done by the machine to the work done on the machine
Mechanical advantage to the velocity ratio
Output to the input

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Engineering Mechanics
The linear velocity of a body rotating at ω rad/s along a circular path of radius r is given by

ω².r
ω²/r
ω.r
ω/r

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Engineering Mechanics
When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.

Inward
Towards back
Towards front
Outward

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Engineering Mechanics
The maximum efficiency of a screw jack is

(1 - tanφ)/(1 + tanφ)
(1 - sinφ)/(1 + sinφ)
(1 + sinφ)/(1 - sinφ)
(1 + tanφ)/(1 - tanφ)

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