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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
3 d
2 d
4 d

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Machine Design
Fibrous fracture occurs in

Brittle material
Elastic material
Hard material
Ductile material

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Machine Design
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set in order to

Ensure uniform loading
Ensure proper alignment
Reduce slip
Reduce vibration

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Machine Design
A rivet is specified by

Length of rivet
Length of tail
Shank diameter
Type of head

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Machine Design
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

p = D sin (90°/T)
p = D sin (120°/T)
p = D sin (360°/T)
p = D sin (180°/T)

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Machine Design
For circumferential joint in boilers, the type of joint used is

Any one of the above
Butt joint with single cover plate
Lap joint with one ring overlapping the other
Butt joint with double cover plate

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