Electrometallurgy and Corrosion MCQ Questions and Answers | Metallurgical Engineering

A. Cu, Fe, Zn

B. Ni, Pb, Al

C. Cr, Mn, Ti

D. All are correct

A. Adsorption only

B. Adsorption and phase layers

C. Phase layers only

D. Neither adsorption nor phase layers

A. P-3, Q-1, R-4, S-2

B. P-3, Q-1, R-2, S-4

C. P-4, Q-2, R-1, S-3

D. P-4, Q-3, R-2, S-1

A. A concentration gradient in the electrolyte may lead to the formation of galvanic cell

B. Chromium is added to improve the oxidation resistance of stainless steel

C. Cathodic protection can be provided by applying a coating

D. A steel bolt or nut is permissible on a large copper vessel

A. P-1, Q-2, R-3, S-4

B. P-4, Q-3, R-2, S-1

C. P-1, Q-2, R-4, S-3

D. P-3, Q-4, R-1, S-2

A. uniform corrosion

B. galvanic corrosion

C. crevice corrosion

D. erosion corrosion

A. It has a very high vapor pressure

B. Effective in closed spaces

C. Inhibit the atmospheric corrosion without being contact with the metal surface

D. It has very high vapor pressure, inhibit atmosphere corrosion without being contact with the metal surface and very effective in closed spaces

A. A type of corrosion attack (deterioration) uniformly distributed over a metal surface

B. Corrosion that proceeds at approximately the same rate over a metal surface. Also called general corrosion

C. Both A and B

D. None of these

A. Impressed-current supply method

B. Anodic protection

C. Sacrificial anode

D. Anodic protection and sacrificial anode

A. m ∝ Q

B. $$\frac{{{m_1}}}{{{m_2}}} = \frac{{{E_1}}}{{{E_2}}}$$

C. both A and B

D. none of these