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Machine Design

Machine Design
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)

5 d
4 d
2 d
3 d

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Machine Design
Factor of safety for fatigue loading is the ratio of

Elastic limit to the yield point
Endurance limit to the working stress
Young's modulus to the ultimate tensile strength
Elastic limit to the working stress

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Machine Design
The centre distance between two meshing involute gears is equal to

Difference of pitch circle radii/cosφ
Difference of base circle radii/cosφ
Sum of base circle radii/cosφ
Sum of pitch circle radii/cosφ

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

10
8
6
4

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Machine Design
The permissible stress for carbon steel under static loading is generally taken as

3000-4000 kg/cm²
4000-4500 kg/cm²
7500-10,000 kg/cm²
2000-3000 kg/m²

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Machine Design
Taper on the cotter and slot is provided

May be provided anywhere
On none of the sides
On one side only
On both the sides

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