**1. A steel rod 500mm long and 20mm10mm in cross-section is subjected to axial pull of 300 KN.If modulus of elasticity is 2105 N/mm2 .Calculate the elongation of the rod. Also calculate strain induced in the bar. **

**------------------------------------------------------------------------------------------------------------------------------**

**2. A hollow cylinder 2 m long has an outside diameter of 50mm and inside diameter of 30mm. If the cylinder is carrying a load of 25 KN. FInd the stress in cylinder , also find deformation of the cylinder E=100 Gpa.**

*(Ans: Stress= 20.0 N/mm2 , Deformation= 0.4 mm )*

**------------------------------------------------------------------------------------------------------------------------------**

**3. A load of 5KN is to be raised with the help of a steel wire. FInd the minimum diameter of wire if stress is not to exceed 100 MPa.**

*(Ans: d=7.98mm)*

**------------------------------------------------------------------------------------------------------------------------------**

**4.In an experiment a steel specimen of 13mm diameter was found to elongate 0.2mm in a 200 mm gauge length when it was subjected to a force of 26.8 KN. If specimen was tested within elastic range, Calculate Young's modulus for the steel.**

*(Ans: E=201.9103 N/mm2 )*

**5. A hollow cast iron column has internal diameter 200mm. What should be external diameter of the column, so that it could carry a load of 1600 KN without the stress exceeding 90 MPa.**

*(Ans: d=250.25 mm)*

**6. A brass rod 1.5 m long and 20mm diameter was found to deform by 1.9mm under tensile load of 40KN. Calculate the modulus of elasticity.**

*(Ans:Modulus of elasticity=100 .51103 N/mm2 )*

**7.A bar 500mm long and 22mm in diameter is elongated by 1.2mm under the effect of axial pull of 105 KN. Calculate stress,strain and modulus of elasticity..**

*(Ans:stress=276.22 N/mm2 ,strain=2.4 e-3, E=115.09 e3)*

**8.A mild steel flat 75mm wide, 150mm thickness and 1.5 m long is subjected to pull of 45 KN. If elongation of flat is 0.6380mm. Find the young's modulus **

*(Ans:E=9.52e3 N/mm2 )*

**9.An alloy bar 1m long and 200mm2 in cross section is subjected to compressive force of 20KN. If the modulus of elasticity is 100GPa. FInd decrease in the length of bar. **

*(Ans:1mm)*