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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
30
34
10

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Theory of Machine
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

Knuckle joint
Universal joint
Flexible coupling
Oldham's coupling

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Theory of Machine
In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by

μ₁ = μ/cos β
μ₁ = μ cos β
μ₁ = μ/sin β
μ₁ = μ sin β

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Theory of Machine
The critical speed of a shaft depends upon its

Mass
Stiffness and eccentricity
Mass and stiffness
Stiffness

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Theory of Machine
Transmission angle is the angle between

Output link and coupler
Output link and fixed link
Input link and fixed link
Input link and coupler

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Theory of Machine
In its simplest form, a cam mechanism consists of following number of links

3
1
4
2

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