TERM TEST 2Strength Of MaterialsYear / Sem: SE MECH / Sem IIIDate: 17-10-2014Time: 3 pm to 4 pmMarks: 20

Q1. Answer the following multiple choice questions(10 Marks)1. A shell may be termed as thin cylinder if ratio of thickness of the wall to the diameter of the shell is less than one to a.5b.10c.15d.202. One MPa is equal to a. 1 N/m2b. 1 N/mm2 c. 1 KN/m2d. 1 KN/mm23. If a bar of length L mm extends by l mm under load W, the strain isa. 1000 l/Lb. l/Lc.0.001 l/Ld. none of these4. The change in length due to tensile force on body is given by a. PL/AEb.PLA/Ec.PLE/A d. AE/PL5.) In a thin shell, the ratio of longitudinal stress to the circumferential stress isa)1/2b) 3/4c) 1d) 2

Q2A. Define modulus of rigidity. Deduce the relation E= 2G(1+)(5 Marks)ORQ2B) A thin cylindrical shell, 3m long and 1m in diameter is subjected to internal pressure of 1 N/mm2. If the thickness of the shell is 12 mm, find the circumferential and longitudinal stresses. Find also maximum shear stress.(5 Marks)

WQ3A) Determine maximum deflection for simply supported beam shown in fig.

abRARB ORQ3B) Derive equation for elongation due to self weight for a rectangular section.(5 Marks)