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Theory of Machine

Theory of Machine
Peaucellier’s mechanism has

Six links
Four links
Twelve links
Eight links

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Theory of Machine
The brake commonly used in railway trains is

Band brake
Band and block brake
Shoe brake
Internal expanding brake

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Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

(m + M)/m
m/(m + M)
(m + M)/M
M/(m + M)

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Theory of Machine
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Forced vibration without damping
Free vibration without damping
Free vibration with damping
Forced vibration with damping

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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)

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

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Theory of Machine
The swaying couple is due to the

Partial balancing
Secondary unbalanced force
Two cylinders of locomotive
Primary unbalanced force

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