The section modulus of a rectangular light beam 25 metres long is 12.5 – McqOptions

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1.	The section modulus of a rectangular light beam 25 metres long is 12.500 cm³. The beam is simply supported at its ends and carries a longitudinal axial tensile load of 10 tonnes in addition to a point load of 4 tonnes at the centre. The maximum stress in the bottom most fibre at the mid span section, is
A.	13.33 kg/cm² tensile
B.	13.33 kg/cm² compressive
C.	26.67 kg/cm² tensile
D.	26.67 kg/cm² compressive
Answer» D. 26.67 kg/cm² compressive

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