Strength of Materials Questions

• The compressive strength of brittle materials is __________ its tensile strength.
• When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy ), the minimum normal stress is
• Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is __________ as that of shaft A.
• When the retained material is subjected to some superimposed or surcharged load, the total horizontal pressure due to surcharged load is (where p = Intensity of the supercharged load)
• The tensile test is carried on __________ materials.
• The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is
• In calculating the strength of a riveted joint in tearing, shearing and crushing, the
• The pull required to shear off a rivet, in double shear, per pitch length is
• The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test.
• The section modulus (Z) of a beam is given by
• The springs in cars are used to store strain energy.
• The shear force of a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is __________ at the fixed end.
• For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.
• If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to
• When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is
• The stress developed in the material without any permanent set is called
• Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'
• The Young's modulus of a material is 125 GPa and Poissons ratio is 0.25. The modulus of rigidity of me material is
• The unit of Young's modulus is same as that of stress.
• Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as