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Machine Design

Machine Design
If a material fails below its yield point, failure would be due to

Fatigue
Sudden loading
Straining
Creep

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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
Static as well as dynamic load
Completely reversed load
Dynamic load

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

More than 50%
None of these
Less than 50%
Equal to 50%

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Machine Design
The pitch diameter is the __________ diameter of an external or internal screw thread.

Largest
None of these
Effective
Smallest

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Machine Design
In a flange coupling, the bolts are subjected to

Shear stress
Compressive stress
Tensile stress
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.

135°
90°
160°
180°

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