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Engineering Mechanics

Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

π/ω
2π × ω
ω/2π
2π/ω

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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
100
50

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

Halved
None of these
Doubled
Quadrupled

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

+9.8 m/s2
-9.8 m/s2
+8.9 m/s2
-8.9 m/s2

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Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 - m
m
1 / m
1 + m

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

The centre of heavy portion
All of these
The bottom surface
The midpoint of its axis

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MORE MCQ ON Engineering Mechanics

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