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Machine Design

Machine Design
In standard taper roller bearings, the angle of taper of outer raceway is

25°
15°
8°
5°

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Machine Design
The material used for brake lining should have __________ coefficient of friction.

Moderate
Low
High
None of these

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Machine Design
Which of the following is not correct procedure to increase the fatigue limit?

Shot peening
Surface decarburisation
Under stressing
Cold working

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Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Double
Same
None of these
Half

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Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

4.5/(4.5 + v)
0.75/(0.75 + √v)
3/(3 + v)
6/(6 + v)

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Machine Design
In testing a material for endurance strength, it is subjected to

Completely reversed load
Dynamic load
Static load
Impact load

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