# Mechanical Engineering Objective Questions { Strength of Materials }

155. A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10,000 kg, the corresponding maximum shearing stress being 30 kg/cm2. The depth of the beam is

156.  For the same height, the bottom width for no tension,

157.  A simply supported wooden beam 150 cm long and having a cross section 16 cm x 24 cm carries a concentrated load, at the centre. If the permissible stress ft = 75 kg/cm2 and Is = 10 kg/cm2 the safe load is

158. The principal stresses at a point are 100, 100 and -200 kgf/cm2, the octo hedral shear stress at the point is :

159.  In a tension test, the yield stress is 300 kg/cm2, in the octa hedral shear stress at the point is :

160.  Consider the following statements :A. For the same shear force, maximum shear stress developed in circular section is lesser thain in the rectangular section.R. Circular section is stronger in shear Of these statements:

161. The key of graphic construction is the cancelling of pairs of

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