Explore topic-wise MCQs in Corrosion Engineering.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Corrosion Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following is/are the hypothesis of mixed potential theory?

A. Any electrochemical reaction can be divided into two or more partial reactions
B. No net accumulation of electric charge during the reaction
C. Any electrochemical reaction can be divided into two or more partial reactions and no net accumulation of electric charge during the reaction
D. Electrochemical reactions can t be divided into partial reactions
Answer» D. Electrochemical reactions can t be divided into partial reactions
Discussion
2.

Which two scientists present the first formal presentation on mixed potential theory?

A. Wagner and Traud
B. Wagner and Evans
C. Traud and Nernst
D. Wilsmore and Nernst
Answer» E.
Discussion
3.

Which of the following is/are correct regarding resistance polarization?

A. Activation energy at the interface is the controlling factor
B. The resistance of transition between electrodes and electrolytes
C. Diffusion of ions in the bulk solution is the controlling factor
D. The resistance of reacting ions for diffusion is the controlling factor
Answer» C. Diffusion of ions in the bulk solution is the controlling factor
Discussion
4.

Agitation will increase the limiting diffusion current density of concentration polarization.

A. True
B. False
Answer» B. False
Discussion
5.

What is the formula to determine limiting diffusion current density (iL) of concentration polarization?

A. i<sub>L</sub>=xnFC<sub>B</sub>/D
B. i<sub>L</sub>=DC<sub>B</sub> /nFx
C. i<sub>L</sub>=DnFC<sub>B</sub>/x
D. i<sub>L</sub>=x/DnFC<sub>B</sub>
Answer» D. i<sub>L</sub>=x/DnFC<sub>B</sub>
Discussion
6.

Which of the following is/are correct regarding concentration polarization?

A. Diffusion of ions in the bulk solution is the controlling factor
B. It usually operates at a high current density
C. It is a continuation of Activation polarization
D. It is a continuation of activation polarization, diffusion of ions in the bulk solution is the controlling factor and it usually operates at high current densities
Answer» E.
Discussion