Strength of Materials MCQs with Answers & Solutions — Page 3

The ratio between the change in volume and original volume of the body is called _______ strainSimple Stress and Strain

Principal stresses at a point in plane stressed element are σ_{x }= σ_y = 500 kg/cm². Normal stress on the plane inclined at 45° to x-axis will bePrincipal Stresses and Strains

In case of a circular section the section modulus is given asBending Stress

In the case of an I-section beam maximum shear stress is atShear Stresses in Beams

Bending Moment M and Torque T is applied on a solid circular shaft. If the maximum bending stress is equal to maximum shear stress developed, the M…Torsion of Shafts

Strain energy theory was postulated byTheories of Failure

If the ratio G/E (G = modulus of rigidity, E = Young's modulus of elasticity) is 0.4, then what is the value of the Poisson ratio?Simple Stress and Strain

The maximum deflection of cantilever beam of length L with a point load W at the free end isDeflection of Beams

The sum of normal stress in a compound stress system isPrincipal Stresses and Strains

What is the relationship between elastic constants E, G and K?Simple Stress and Strain

Modulus of elasticity is defined as the ratio ofSimple Stress and Strain

At a Point in a stressed body the principal stresses are 80 MN/m² (Tensile) and 40 MN/m² (Compressive). Calculate the maximum shear stress at the…Principal Stresses and Strains

When a shaft is subjected to pure twisting, the type of stress developed in the shaft isTorsion of Shafts

A steel rod of 2 cm² area and 1 m in height is subjected to a pull of 40,000 N. If Young’s modulus is 2 × 10⁵ N/mm², the elongation of the rod in mm…Simple Stress and Strain

Principal Stresses at a point in a plane stressed element are σₓ = σ_y = 500 N/mm². Normal stress on the plane inclined at 45° to the X-axis will bePrincipal Stresses and Strains

In a rectangular section, τₐᵥ = 50 MPa, what is the shear stress at neutral axis?Shear Stresses in Beams

Which of the following theories is suitable for ductile material?Theories of Failure

In case of circular section, with diameter ‘d’ the section modulus is given asBending Stress

Which of the following statements is correct?Simple Stress and Strain

The Point of contra flexure is a point where:Shear Force and Bending Moment

The ratio of Young’s modulus of high tensile steel to that of mild steel is aboutSimple Stress and Strain

The deformation of the bar per unit length in the direction of the force is known asSimple Stress and Strain

Which of the following is not an elastic constant?Simple Stress and Strain

What is the typical range of Poisson’s ratio for most materials?Simple Stress and Strain

What is the physical interpretation of the shear modulus?Simple Stress and Strain

What is the relationship between Young’s modulus (E) and the spring constant (k) for a rod of length L and cross-sectional area A?Simple Stress and Strain

What happens to Poisson’s ratio as a material approaches incompressibility?Simple Stress and Strain

What is the physical meaning of a material having a low Poisson’s ratio?Simple Stress and Strain

Which of the following statements about isotropic materials is true?Simple Stress and Strain

In a state of plane stress, how many independent stress components are there?Plane Stress and Plane Strain

On Mohr’s circle for plane stress, what does the diameter of the circle represent?Principal Stresses and Strains

What is the physical meaning of principal stresses?Principal Stresses and Strains

In a uniaxial stress state, what is the relationship between the applied stress (σ) and the maximum shear stress (τmax)?Principal Stresses and Strains

What is the stress invariant?Principal Stresses and Strains

Which of the following best describes the behaviour of a simply supported beam under a uniformly distributed load?Shear Force and Bending Moment

What is the maximum normal stress theory (Rankine’s theory) of failure?Theories of Failure

What is the significance of the octahedral shear stress?Theories of Failure

In plane stress, if σx = 60 MPa, σy = 20 MPa, and τxy = 10 MPa, what is the maximum shear stress?Principal Stresses and Strains

In a section, shear centre is a point through which, if the resultant load passes, the section will not be subjected to any i. Torsion ii. Bending…Shear Stresses in Beams

In a conjugate beam method, the bending moment at any point of the conjugate beam gives _______in the actual beamDeflection of Beams

Consider a cantilever beam AB of span L fixed at A and free at B and subjected to a uniformly w throughout the span. According to the moment-area…Deflection of Beams

Consider a 1 m span cantilever beam of rectangular section (breadth 100 mm and depth 200 mm). If limiting shear stress in the beam is 1.5 N/mm2, then…Shear Stresses in Beams

At a cross-section of the beam, the maximum compressive stress at the top is 8 MPa and the maximum tensile stress at the bottom is 2 MPa. If the…Bending Stress

A cantilever beam of span L is subjected to a concentrated load P at the mid-span. If the flexural rigidity of beam is EI, then the slope at the free…Deflection of Beams

A cantilever beam of span L and flexural stiffness EI is subjected to a downward concentrated load P at the mid-span and an upward concentrated load…Deflection of Beams

The material in which large deformation is possible before the absolute failure by rupture takes place is known asSimple Stress and Strain

The spring constant of a helical compression spring does not depend onSprings

A beam is said to be of uniform strength if theBending Stress

If the areas of cross-section of a square beam and a circular beam subjected to equal bending moments are same then _______Bending Stress

The ratio of the lateral strain to the linear strain is calledSimple Stress and Strain