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Machine Design

Machine Design
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)

0.8 d
1.2 d
0.5 d
d

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Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

(k₁ - k₂)/ (k₁ k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ + k₂)

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Machine Design
A column of length l is fixed at both ends. The equivalent length of the column is

l
2 l
l/2
l/√2

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Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

21
25
15
17

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Machine Design
In radial cams, the follower moves

Along the cam axis
In a direction parallel to the cam axis
In any direction irrespective of cam axis
In a direction perpendicular to the cam axis

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Machine Design
The size of a cam depends upon

Pitch curve
Prime circle
Base circle
Pitch circle

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