Machine Design
A tap bolt

Has pointed threads
Has both the ends threaded
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has a head on one end and a nut fitted to the other

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Machine Design
Which is correct statement? Stress concentration in static loading is

Very serious in ductile materials and less serious in brittle materials
Very serious in brittle materials and less serious in ductile materials
Equally serious in both types of materials
Seriousness would depend on other factors

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Machine Design
Coaxing is the procedure of increasing

Metal strength by cycling
Metal hardness by surface treatment
Fatigue limit by over-stressing the metal by successively increasing loadings
Metal resistance to corrosion by coating

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