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Machine Design

Machine Design
The crest diameter of a screw thread is same as

Major diameter
Pitch diameter
Core diameter
Minor diameter

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Machine Design
Failure of a material is called fatigue when it fails

At the yield point
At the elastic limit
Below the elastic limit
Below the yield point

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

(6V/ π)3
(6V/ π)2
(6V/ π)1/3
(6V/ π)1/2

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/2
d/4
d/3
3d/4

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Machine Design
The included angle in unified of American National threads is

29°
47°
55°
60°

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Machine Design
A flange coupling is used to connect two shafts

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

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