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Machine Design

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Metric
Acme
Square
Buttress

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Machine Design
The included angle for the British Association thread is

47.3°
60°
55°
29°

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Machine Design
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is

10 microns
0.01 micron
0.1 micron
1 micron

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Machine Design
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to

Static load
Dynamic load
Static as well as dynamic load
Completely reversed load

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Machine Design
If two springs are in parallel then their overall stiffness will be

Half
Double
Same
None of these

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

180°
135°
90°
160°

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