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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is

bh3/4
bh3/8
bh3/36
bh3/12

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Engineering Mechanics
In order to double the period of simple pendulum, the length of the string should be

Quadrupled
Doubled
Halved
None of these

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Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 + m
1 - m
1 / m
m

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Engineering Mechanics
In a screw jack, the effort required to lift the load is given by (where W = Load lifted, α = Helix angle, and φ = Angle of friction.)

P = W tan (α - φ)
P = W cos (α + φ)
P = W tan (α + φ)
P = W tan (φ - α)

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Engineering Mechanics
The maximum efficiency of a lifting machine is

1/m
V.R./m
m/V.R.
1/(m × V.R.)

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Engineering Mechanics
A pendulum which executes one beat per second is known as

Compound pendulum
Simple pendulum
Second's pendulum
Torsional pendulum

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MORE MCQ ON Engineering Mechanics

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