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Machine Design

Machine Design
The centre to centre distance between two consecutive rivets in a row, is called

Margin
Back pitch
Diagonal pitch
Pitch

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Machine Design
Guest's theory of failure is applicable for following type of materials

Brittle
Ductile
Plastic
Elastic

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Machine Design
Residual stress in materials

Is independent of external loads
Becomes zero when external load is removed
Is always harmful
Acts when external load is applied

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Machine Design
The root angle of a bevel gear is equal to

Pitch angle - addendum angle
Pitch angle + dedendum angle
Pitch angle + addendum angle
Pitch angle - dedendum angle

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Machine Design
In the assembly of pulley, key and shaft

Pulley is made the weakest
Key is made the strongest
All the three are designed for equal strength
Key is made the weakest

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.06
1.12
1.26
1.58

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