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Machine Design

Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

Less
More
Same
None of these

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Machine Design
The function of the washer is to

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

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Machine Design
Shaft coupling is used in machinery to

All of these
Reduce the transmission of shock loads
Introduce protection against over loads
Introduce mechanical flexibility

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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
P/2.s.l
2P/s.l

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Machine Design
The taper on key is given on

Any side
On both sides
Bottom side only
Top side only

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Machine Design
Which of the following is an anti-friction bearing?

Needle bearing
Collar bearing
Pedestal bearing
Journal bearing

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