A steel rod 10mm in diameter and 1m long is heated from 20 to 100 degr – McqOptions

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1.	A steel rod 10mm in diameter and 1m long is heated from 20 to 100 degree celcius, E = 200 GPa and coefficient of thermal expansion is 12 x10-6 per degree celcius. Calculate the thermal stress developed?
A.	192 MPa(tensile)
B.	212 MPa(tensile)
C.	192MPa(compressive)
D.	212 MPa(compressive)
Answer» D.

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