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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)

1.2 d
0.8 d
0.5 d
d

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Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2 d
1.2 d
1.6 d
2.5 d

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Machine Design
A key way lowers

The ductility of the shaft
The strength of the shaft
The rigidity of the shaft
Both the strength and rigidity of the shaft

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Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

4
43832
2
1

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth

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Machine Design
The piston pin bearings in heavy duty diesel engines are

Spherical roller bearings
Cylindrical roller bearings
Needle roller bearings
Tapered roller bearings

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