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# Important questions for Strength Of Materials

• Strength Of Materials - SOM
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JNTU World OBJECTIVES or ld www.alljntuworld.in To meet the challenge of ensuring excellence in engineering education, the issue of quality needs to be addressed, debated and taken forward in a systematic manner. Accreditation is the principal means of quality assurance in higher education. The major emphasis of accreditation process is to measure the outcomes of the program that is being accredited. W In line with this, Faculty of Institute of Aeronautical Engineering, Hyderabad has taken a lead in incorporating philosophy of outcome based education in the process of problem solving and career development. So, all students of the institute should understand the depth and approach of course to be taught through this question bank, which will enhance learner’s learning process. TU PART – A (Short Answer Questions) Blooms Course Taxonomy Outcome Level Q. No Questions 1 2 Define Longitudinal strain and lateral strain. State Hooke’s law Define Modular ratio, Poisson’s ratio What is modulus of elasticity? Explain lateral strain with a neat sketch Write the relationship between bulk modulus, rigidity modulus and Poisson’s Ratio Draw the stress-strain diagram for mild steel, brittle material and a ductile material and indicate the sailent points What is Principle of Superposition? What is the procedure for finding the thermal stresses in a composite bar? Define Factor of Safety, working stress and allowable stress. JN 3 4 5 6 7 Unit-I 8 9 10 1 2 3 4 5 6 7 Knowledge Knowledge 1 2 Knowledge Understand Understand Create Apply 4 1 1 2 2 Understand Understand Knowledge 2 2 3 Understand Knowledge 1 2 Knowledge 2 Create Knowledge Knowledge Understand 2 1 3 4 Unit-II Explain shear force in a beam with neat sketches What are the different types of beams? Differentiate between a point load and a uniformly distributed load. What is the maximum bending moment for a simply supported beam subjected to uniformly distributed load and where it occurs? Write the relation between bending moment, shear force and the applied load. Define point of contra flexure. Define moment of resistance of a beam What do you mean by thrust Diagram? 1 Downloaded From JNTU World (http://www.alljntuworld.in)

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www.alljntuworld.in 8 9 JNTU World How many points of Contraflexure you will have for a simply supported beam Knowledge overhanging at one end only? What are the sign conventions for shear force and bending moment in general? Understand 4 2 UNIT-III Knowledge understand Understand Understand Knowledge knowledge 2 3 1 1 1 1 knowledge knowledge create Evaluate 2 2 2 2 understand 3 understand Name the stresses set up in thin cylinders subjected to internal fluid pressure Knowledg e Write the expressions for circumferential stress and longitudinal stress for a Create Write an expression for change in volume of athin cylindrical shell subjected to Create longitudinal joint. Define the term efficiency of a joint and write the equation Understan internal fluid pressure. d What is hoop stress and explain why hoop stress is required. understand Define the terms torsion, torsional rigidity and polar moment of inertia. understand Derive an expression for shear stress produced in circular shaft which is subjected evaluate 1 2 2 2 4 2 3 3 1 2 3 4 5 6 Define the terms: bending stress, neutral axis What do you mean by simple bending What do you mean by pure bending What is the meaning of strength of section Define the terms : modular ratio, equivalent section Define the terms: section modulus, flitched beams. 1 2 3 4 Define terms of principle plane and principle Stress Define the term obliquity and how it is determined Write a note on mohr’s circle of stress Derive the expression for the stresses on an oblique plane of a rectangular body or ld UNIT-IV When the body is subjected to to simple shear stress 5 Discuss about about theories of failure UNIT-V Define the term thin cylinders W 1 2 3 4 5 6 7 8 to torsion. What are assumptions made in derivation? PART – B (Long Answer Questions) Questions TU Q. No 1 2 UNIT – I Three sections of a bar are having different lengths and different diameters. The bar Knowledge is subjected to an axial load P. Determine the total change in length of the bar. Take Young’s modulus of different sections as same. Prove that the total extension of a uniformly tapering rod of diameters D1 & D2, Knowledge when the rod is subjected to an axial load P is given by dL= 4PL/(πE D1 D2) where L is total Length of the rod. Find an expression for the total elongation of a bar due to its own weight, when the Knowledge bar is fixed at its upper end and hanging freely at the lower end. JN 3 Blooms Course Taxonomy Outcome Level 1 2 2 4 Find an expression for the total elongation of a uniformly tapering rectangular bar Understand when it is subjected to an axial load P. 2 5 6 Derive the relation between three elastic modulii. Understand Define Volumetric Strain. Prove that the volumetric strain for a rectangular bar Knowledge subjected to an axial load P in the direction of its length is given by 2 2 εv= (δl/l)(1-2µ) where µ= Poisson’s Ratio and δl/l = longitudinal strain. 7 Derive an expression between modulus of elasticity and modulus of rigidity. 2 Downloaded From JNTU World (http://www.alljntuworld.in) Understand 2