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Theory of Machine

Theory of Machine
At the nodal point in a shaft, the amplitude for torsional vibration will be

Maximum
Zero
Minimum
Infinity

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Theory of Machine
In a flat collar pivot bearing, the moment due to friction is proportional to

(r₁³ - r₂³)/(r₁² - r₂²)
(r₁³ - r₂³)/(r₁ - r₂)
(r₁² - r₂²)/(r₁ + r₂)
(r₁² - r₂²)/(r₁ - r₂)

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Theory of Machine
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

Flywheel
Meyer's expansion valve
D-slide valve
Governor

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

μ W R
(2/3) μ W R
(3/4) μ W R
(1/2) μ W R

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Theory of Machine
The frequency of oscillation of a torsional pendulum is

r/2πk. √(l/g)
2πk/r. √(g/l)
2πr/k. √(g/l)
r/2πk. √(g/l)

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

3
5
4
2

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