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Theory of Machine

Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

20
34
30
10

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Theory of Machine
According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centers will lie on a

Straight line
Triangle
Rectangle
Parabolic curve

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Theory of Machine
Cylindrical cams can be classified as

Tangent
Reciprocating
Circular
None of these

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Theory of Machine
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?

Meyer's expansion valve
Flywheel
D-slide valve
Governor

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Theory of Machine
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)

l₁l₂ = kG
l₂ = kG
l₁ = kG
l₁l₂ = kG²

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Theory of Machine
The Klein's diagram is useful to find

Angular acceleration of various parts
Velocity of various parts
Acceleration of various parts
Displacement of various parts

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