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Machine Design

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

Plastic
Brittle
Elastic
Ductile

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Machine Design
The function of the washer is to

Provide cushioning effect
Fill up the axial gap
Absorb shocks and vibrations
Provide bearing area

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Machine Design
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Long bearing
Medium bearing
Short bearing
Square bearing

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Machine Design
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

P/√2.s.l
√2P/s.l
2P/s.l
P/2.s.l

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Machine Design
In V-belt drive, belt touches

Both at bottom and sides
At sides only
At bottom
Could touch anywhere

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Is uniform throughout
Varies exponentially, being less at the torque-input end
Varies exponentially, being more at the torque-input end
Varies linearly

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