Ql:-(A) Choose(5) the correct answer:- 1- Rusting " applies to the corrosion of (iron or iron - base) the formula is approximately: (a) Fe3O4 2- The corrosion occurs of most metals because of (b) Fe2O3 (C) Fe (OH)2 (d) Fe;O4 FE203•×H2O (a) natural of martial 3-which of the following is an incorrect statement (a) corrosion is a spontaneous process (c) corrosion is an irreversible process 4- Dezincification is forms of corrosion: (a) Uniform Corrosion (b) Crevice Corrosion 5- Polarization is occur because of (a) change of potential from a stabilized state (c) n= Ei- E° 6-In concentration cells ( a) the metal is in contact with two half cells having the same electrolyte but at different concentrations (b) the metal is in contact with two half cells, having the same electrolytes with the same concentration (c) no liquid junction is present (d) there is no migration of ions from one electrolyte to another electrolyte. (b)out condition (c) return to their natural state (d) both of them (b) corrosion is non-spontaneous process (d) corrosion is degradation process (c) Intergranular Corrosion (d) Selective Leaching (b) as result of the passage of current (d) both of them

Ql:-(A) Choose(5) the correct answer:- 1- Rusting " applies to the corrosion of (iron or iron - base) the formula is approximately: (a) Fe3O4 2- The corrosion occurs of most metals because of (b) Fe2O3 (C) Fe (OH)2 (d) Fe;O4 FE203•×H2O (a) natural of martial 3-which of the following is an incorrect statement (a) corrosion is a spontaneous process (c) corrosion is an irreversible process 4- Dezincification is forms of corrosion: (a) Uniform Corrosion (b) Crevice Corrosion 5- Polarization is occur because of (a) change of potential from a stabilized state (c) n= Ei- E° 6-In concentration cells ( a) the metal is in contact with two half cells having the same electrolyte but at different concentrations (b) the metal is in contact with two half cells, having the same electrolytes with the same concentration (c) no liquid junction is present (d) there is no migration of ions from one electrolyte to another electrolyte. (b)out condition (c) return to their natural state (d) both of them (b) corrosion is non-spontaneous process (d) corrosion is degradation process (c) Intergranular Corrosion (d) Selective Leaching (b) as result of the passage of current (d) both of them

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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