A hot short metal is_________________? A. brittle when coldB. brittle when hot C. brittle under all conditions D. ductile at high temperature E. hard when hot

Rankine’s theory of failure is applicable for following type of materials___________________? A. brittle B. ductile C. elastic D. plastic E. tough

Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________? A. Brinell B. Rockwell C. Vicker D. Shore’s sceleroscope E. none of the above

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by_________________? A. decreasing the cross-section area of’ bar B. increasing the cross-section area…

If a load W is applied instantaneously on a bar; then the stress induced in bar will___________________? A. be independent of ratio of mass of load W to mass of bar (y) B. increase with increase in y C. decrease…

Stress concentration is caused due to_____________________? A. variation in properties of material from point to point in a member B. pitting at’points or areas at which loads on a member are applied C. abrupt change of sectionD. all of the…

Plastic flow in ductile materials_____________________? A. increases the seriousness of static load-ing stress concentrationB. lessens the seriousness of static load¬ing stress concentration C. has no effect on it D. depends on other considerations E. none of the above

The fatigue life of a part can be improved by_____________________? A. electroplating B. polishing C. coatingD. shot peening E. heat treating

Stress concentration in cyclic loading is more serious in__________________? A. ductile materials B. brittle materials C. equally serious in both cases D. depends on other factors E. unpredictable

Fatigue strength can be increased by__________________? A. cold working B. shot peening C. grinding and lapg surfaceD. hot working E. using gradual changes of section