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Machine Design

Machine Design
Taper usually provided on cotter is

1 in 40
1 in 5
1 in 24
1 in 10

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Machine Design
Residual stress in materials

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

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Machine Design
A universal coupling is used to connect two shafts

Which are not in exact alignment
Have lateral misalignment
Which are perfectly aligned
Whose axes intersect at a small angle

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

Equal to
Less than
None of these
More than

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Machine Design
The bearings of heavy series have capacity __________ over the medium series.

20 to 30%
10 to 20%
30 to 40%
40 to 50%

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Machine Design
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

Initial tension or external load, whichever is greater
External load applied
Sum of the initial tension and external load applied
Initial tension

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