Modern Theory Principles and Applications MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Modern Theory Principles and Applications, a fundamental topic in the field of Corrosion Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Modern Theory Principles and Applications MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Modern Theory Principles and Applications mcq questions that explore various aspects of Modern Theory Principles and Applications problems. Each MCQ is crafted to challenge your understanding of Modern Theory Principles and Applications principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Corrosion Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Modern Theory Principles and Applications MCQs are your pathway to success in mastering this essential Corrosion Engineering topic.

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Modern Theory Principles and Applications MCQs | Page 3 of 9

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Q21.
Which of the following is the controlling factor of Activation polarization?

a.

The activation energy of a reaction

b.

Diffusion of ions in the solution

c.

The temperature of a solution

d.

The velocity of a solution

Discuss
Answer: (a).The activation energy of a reaction
Q22.
Which of the following mentioned is/are the types of polarization?

a.

Activation polarization

b.

Concentration polarization

c.

Resistance polarization

d.

Activation, concentration and resistance polarization

Discuss
Answer: (d).Activation, concentration and resistance polarization
Q23.
What is the relationship between reaction rate and overvoltage for activation polarization?

a.

nₐ=±Ξ²log(iβ‚€/i)

b.

nₐ=±Ξ²log(I/iβ‚€)

c.

nₐ=±Ξ²log(1-iβ‚€/i)

d.

nₐ=±Ξ²log(1-i/iβ‚€)

Discuss
Answer: (b).nₐ=±Ξ²log(I/iβ‚€)
Q24.
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

Discuss
Answer: (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
Q25.
What is the formula to determine limiting diffusion current density (iL) of concentration polarization?

a.

iL=xnFCΠ²/D

b.

iL=DCΠ²/nFx

c.

iL=DnFCΠ²/x

d.

iL=x/DnFCΠ²

Discuss
Answer: (c).iL=DnFCΠ²/x
Q26.
Agitation will increase the limiting diffusion current density of concentration polarization.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q27.
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

Discuss
Answer: (b).The resistance of transition between electrodes and electrolytes
Q28.
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

Discuss
Answer: (d).Wilsmore and Nernst
Q29.
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

Discuss
Answer: (c).Any electrochemical reaction can be divided into two or more partial reactions and no net accumulation of electric charge during the reaction
Q30.
Which of the following is/are correct regarding passivation?

a.

It is defined as the loss of reactivity at certain conditions

b.

Usually results in the formation of the oxide layer

c.

The corrosion rates are relatively low

d.

It is defined as loss of reactivity at certain conditions usually due to the formation of the oxide layer and corrosion rates are relatively low

Discuss
Answer: (d).It is defined as loss of reactivity at certain conditions usually due to the formation of the oxide layer and corrosion rates are relatively low
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