Question Set 94
1.What do you understand by eutectic ? Ans: It is mechanical mixture of two or more phases which solidify simultaneously from the liquid alloy. 2.Explain the difference between grey iron…
Question Set 93
1.Define buckling factor. Ans: It is the ratio of the equivalent length of column to the minimum radius of gyration. 2.What do you understand by catenary cable ? Ans: A…
Question Set 92
1.What is the structure of pure iron and whether it is soft or hard ? Ans: Ferrite and it is soft. 2.Which elements increase the corrosion resistance of steel ?…
Question Set 91
1.Explain the difference between ferrite, austenite and graphite ? Ans: Ferrite is the solid solution of carbon and other constituents in alpha-iron. It is soft, ductile and relatively weak. Austenite…
Question Set 90
1.For which parts the Wahl factor and Lewis form factor used ? Ans: For springs and gears respectively. 2.How oxygen can be removed from steel during melting? What are fully…
Question Set 89
1.What does thermal diffusivity of metals signify. Ans: Thermal diffusivity is associated with the speed of propagation of heat into solids during changes in temperature with time. 2.For conduction of heat,…
Question Set 88
1.Which element is added in steel to increase resistance to corrosion ? Ans: Chromium. 2.Whether individual components in composite materials retain their characteristics or not? Ans: yes. 3.An elastomer is…
Question Set 87
1.What is the difference between isotropic and anisotropic materials ? Ans: If a material exhibits same mechanical properties regardless of loading direction, it is isotropic, e.g., homogeneous cast materials. Materials…
Question Set 86
1.Which reactor produces more fissionable material than it consumes ? Ans: Breeder reactor. 2.Which reactor uses natural uranium as fuel ? Ans: Gas cooled reacator. 3.Which reactor uses heavy water…
Question Set 85
1.How the analyses and calorific values of fuels can be reported ? Ans: It may be reported as (a) as received or fired (wet) basis (b ) dry or moisture…
