Engineering Materials Online Quiz Mech Sub-Wise Quiz Edit 1. In normalizing process, the hypereutectoid steel is heated from 30° C to 50° C above the upper critical temperature and then cooled in still air. True False 2. An eutectoid steel consists of Wholly pearlite Wholly austenite 3. Cast iron is used in those parts which are subjected to shocks. Correct Incorrect 4. The upper critical point varies according to the carbon content in steel. True False 5. The acidic Bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus. Correct Incorrect 6. Phosphorus is added in low carbon steels to raise its yield point. True False 7. Pearlite is a combination of 87% ferrite and 13% cementite. Yes No 8. The aluminium alloy, mainly used, for anodized utensil manufacture, is Duralumin Hindalium 9. The alloy, mainly used for corrosion resistance in stainless steels is Silicon Chromium 10. Corrosion resistance of steel is increased by adding nickel and chromium. Agree Disagree 11. An aluminium alloy with 11% silicon is used for making engine pistons by die casting technique. Yes No 12. The toughness of a material _________ when it is heated. Increases Decreases 13. Grey cast iron is ________ than white cast iron. Softer Harder 14. The stiffness is the ability of a material to resist deformation under stress. True False 15. In a unit cell of close packed hexagonal space lattice, there are twenty four atoms. Correct Incorrect 16. The steel scrap added in the charge of cupola controls the grade of cast iron produced. Correct Incorrect 17. Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons. Less than More than 18. Brass (alloy of copper and zinc) is an example of Substitutional solid solution Interstitial solid solution 19. The compressive strength of cast iron is ________ that of its tensile strength. Less than More than 20. Dislocations in materials refer to the following type of defect Point defect Line defect Score = Correct answers: Online Quiz Home Page
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