Please say the question number and the litter b) dial gauge c) ruler d) electro-

Question

Please say the question number and the litter
b) dial gauge c) ruler d) electro-resistive gauge e) none of these a) have fibrous cup and cone shape b) fracture without yield c) rupture without necking d) none of these 31. (2) at rupture, ductile materials 32. (2) Which point on stress strain curve Elastic limit b) Ultimate c) Neutral axis d) Vield e Eracture a) Elastic limit b) Yield point c) Ultimate point d) Breaking point e) None of these 25. (2) strain when unloading after plastic motion is 33. (2) brittle materials neck at rupture a) true b) false a- permanent set b) elastic recovery c) strain hardening d) elastic region e) none of these 34. (2) engineering stress is always

Explanation / Answer

I am answering some of the questions whose answers are not marked by you,

Q27- false ( longitudinal tension cause lateral contraction)

Q29 false ( bending produce normal stresses (tensile and compressive stresses) in the opposite sides of the neutral axis

Q30 Electro resistive gauge ( it measure the resistance of the strain gauge)

Q31 A ( ductile material fails after neck formation leads to the formation of cone shape)

Q32 Elastic limit ( hooks law follows till proportionality limit but the elasticity appears beyond that point and plastic region yield point and fracture point all lies after elastic limit)

Q33 false ( no neck formation occurs in brittle materials)

Q34 true ( in tension test if it is assumed that the dimensions remain constant throughout the experiment we get true stresses but in actual practice, lateral contraction occurs so the area of crosses section decrease so actual stress decrease )

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