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Theory of Machine

Theory of Machine
The number of links in pantograph mechanism is equal to

3
2
5
4

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Theory of Machine
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the

1
2
0.5
1.5

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Theory of Machine
A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

m₁ r₁ = m₂ r₂
m₁ r₂ = m₂ r₁
None of these
m₁ m₂ = r₁ r₂

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Theory of Machine
When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

Compound pendulum
Second's pendulum
Simple pendulum
Torsional pendulum

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Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

2ECS
EC S/2
2ECS²
2E²CS

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Theory of Machine
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

The former is mathematically accurate
The former is most rigid
The former is having turning pair
The former is most economical

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