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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)

d
1.2 d
0.5 d
0.8 d

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Machine Design
If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as

b/2L
1 - 2 b.L
1 - (b/L)
b/L

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Machine Design
The application of third type levers is found in

Hand wheel of a punching press
Handle of a hand pump
A pair of tongs
Lever of a loaded safety valve

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Machine Design
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = angle of wrap (radians)

(P1 - mv²)/ (P2 - mv²) = eᶠα
P1 / P2 = eᶠα
P1 / P2 = e–ᶠα
(P1 - mv²)/ (P2 - mv²) = e–ᶠα

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Machine Design
The strength of the unriveted plate (P) per pitch length is equal to

p.t.σt
p.d.σt
(p - d) σt
(p - d) t.σt

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Machine Design
Rankine Gordon formula for buckling is valid for

Short and long column
Very long column
Short column
Long column

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