Electrometallurgy and Corrosion MCQ Questions and Answers

Electrometallurgy and Corrosion MCQ Questions and Answers | Metallurgical Engineering

Enhance your knowledge of Electrometallurgy and Corrosion with this comprehensive collection of MCQ questions and answers. These MCQ questions and answers in Electrometallurgy and Corrosion are specifically designed for students of Metallurgical Engineering who are preparing for the GATE Exam. Strengthen your preparation and excel in your studies with this valuable resource. Page-6 section-1

Which of the following metal does not resists the corrosion process?

A) Fe B) Ni C) Cu D) Pb

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Answer & Solution

Answer: Option A

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For oxide layer to be protective, the Pilling Bedworth ratio should be

A) close to 1 B) less than 0.5 C) nearly 5 D) greater than 10

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Answer & Solution

Answer: Option A

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AI₂O₃ + 6H⁺ = 3H₂O + 2Al, ΔG° = 897.3 kJ, where hydrogen ion concentration is unity. The reaction potential of the above reaction under standard state will be

A) - 155 V B) - 1.40 V C) 1.65 V D) 1.75 V

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Answer & Solution

Answer: Option A

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Match applications in Group 1 with the commonly used corrosion protection methods in Group 2.

Group 1	Group 2
P. Sea going vessel	1. Inorganic coating
Q. Undergrciund pipeline	2. Sacrificial anode
R. Electric traction tower	3. Aluminium paint
S. Electric poles	4. Impressed current
	5. Galvanising

A) P-2, Q-4, R-5, S-3 B) P-2, Q-3, R-5, S-1 C) P-1, Q-2, R-5, S-4 D) P-4, Q-3, R-1, S-2

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Answer & Solution

Answer: Option A

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Match the following:

P. Sensitization	1. Phosphating
Q. Sacrificial anode	2. Anodic protection
R. Nickel plating	3. Cathodic protection
S. Conversion coating	4. Stainless steel

A) P-4, Q-3, R-2, S-1 B) P-1, Q-2, R-3, S-4 C) P-2, Q-3, R-4, S-1 D) P-3, Q-2, R-1, S-4

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Answer & Solution

Answer: Option C

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Displacement of metal stands for

A) A metal will displace from solution B) The ions of a metal more noble than itself C) Displacement increases with increased separation between metals in the series D) All are correct

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Answer & Solution

Answer: Option D

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The following is employed as sacrificial anode to provide cathodic protection to ships, pipelines and storage tanks :

A) Iron B) Copper C) Nickel D) Magnesium

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Answer & Solution

Answer: Option D

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