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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

π
1
1/π
π × number of teeth

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Machine Design
Failure of a material is called fatigue when it fails

Below the elastic limit
Below the yield point
At the yield point
At the elastic limit

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

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Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

0.042361111111111
0.085416666666667
0.084027777777778
0.12638888888889

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Machine Design
According to Indian standards, total numbers of fundamental deviations are

25
20
15
10

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Machine Design
A backing ring is used inside the pipe joint when making a

Butt weld
Sleeve weld
Socket weld
Fillet weld

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