Strength of Materials

A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________? A. uniform throughout B. increase uniformly C. first increase…

If the radius of wire stretched by a load is doubled, then its Young’s modulus will be_______________? A. doubled B. halved C. become four times D. become one-fourthE. remain unaffected

Tensile strength of a material is obtained by dividing the maximum load during the test by the_________________? A. area at the time of fractureB. original cross-sectional area C. average of A. and B. D. minimum area after fracture…

The Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________? A. halfB. same amount C. double D. one-fourth E. four times…

The intensity of stress which causes unit strain is called_______________? A. unit stress B. bulk modulus C. modulus of rigidityD. modulus of elasticity E. principal stress

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________? A. 4 tonnes/cm2B. 8…

Which of the following has no unit __________________? A. kinematic viscosity B. surface tension C. bulk modulusD. strain E. elasticity

In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________? A. moreB. less C. same D. more/less depending on composition E. may have any value…

Which of the following materials is most elastic_________________? A. rubber B. plastic C. brassD. steel E. glass

The value of Poisson’s ratio for steel is between_________________? A. 0.01 to 0.1 B. 0.23 to 0.27C. 0.25 to 0.33 D. 0.4 to 0.6 E. 3 to 4