Q. A galvanic cell set up due to differences in the concentration of metal ion is known as ________

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Q. A galvanic cell formed due to residual stresses is known as ________

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Q. The phenomenon where the density of metal is exceptionally low due to increasing potential is known as _______

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Q. Which of these materials is not added to iron for improving its oxidation resistance?

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Q. How much chromium is required to provide oxidation resistance for use over 1000°C?

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Q. Molybdenum with hydrogen can be used up to ________

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Q. 10% chromium mixed with ______ can be used up to 1100°C.

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Q. Which of these metals does not require alloying for oxidation resistance?

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Q. _________ is used to prevent duralumin from corrosion.

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Q. Galvanized ion is made by dipping low carbon steel in molten zinc at ________

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Q. Which of these is not a way to prevent intergranular corrosion?

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Q. Dezincification of brass is prevented by addition of ________

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Q. Season-cracking can be prevented by cold-working of brass at _________

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Q. How can caustic embrittlement be avoided?

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Q. How is fracture stress defined?

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Q. What is the SI unit of fracture toughness?

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Q. The tensile strength required to break interatomic bonds across two adjacent planes is ________

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Q. What is the breaking stress of brittle materials?

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Q. In crystalline materials, fracture occurs normal to crystallographic planes called ___________

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Q. What is the surface energy of a crack?

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