Which of the following is not a characteristic observed in material failure by fatigue fracture ?

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Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________?

A. Period increases B. Period decreases C. Group increases D. Both ‘B’ & ‘C’...

Ceramic compounds as compared to metallic compounds ____________________ ?

A. Crystallise faster B. Resist greater tensile stress at room temperature C. Have higher melting temperature D. Are better conductor of electricity at higher temperature...

Pick out the wrong statement ?

A. Cold cracking of a weld is due to the presence of hydrogen gas in the weld B. True stress is given by, ζ = ζE (1 + εE), where ζE and εE are engineering stress and engineering strain respectively C. Phosphorous can be easily recovered in the iron blast furnace D. High residual stress … Pick out the wrong statement ?Read More...

Maraging steels derive their strength from the following mechanism ?

A. A fine, highly dislocated and strong martensite B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc C. Fine dispersions of alloy carbides in a ferrite matrix D. Fine dispersions of Fe3 C nucleated on dislocations in austenite...

Propulsion of rocket follows from the_________________?

A. Newton’s second law of motion B. Newton’s third law of motion C. Law of projectiles D. Archimedes principle...