Corrosion Engineering Quiz: How Well Do You Know Corrosion Engineering?

20 Questions | By Cecase | Last updated: Mar 21, 2022 | Total Attempts: 604

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Corrosion Engineering Quiz: How Well Do You Know Corrosion Engineering? - Quiz

A list of questions related to corrosion engineering which are surely going to boggle your heads !

Questions and Answers

1.

Rusting of iron is a typical example for
- A.
  
  Chemical corrosion
- B.
  
  Electrochemical corrosion
- C.
  
  Physical reaction
- D.
  
  None of these
2.

Pitting factor of unity represents ____ corrosion.
- A.
  
  Uniform
- B.
  
  Galvanic
- C.
  
  Inter granular
- D.
  
  Fretting
3.

Passivity in stainless steel is due to the formation of
- A.
  
  Sulphide film
- B.
  
  Carbide film
- C.
  
  Oxide film
- D.
  
  Chloride film
4.

Iron pipe carrying water is more anodic to copper. This is due to
- A.
  
  Concentration cell
- B.
  
  Galvanic cell
- C.
  
  Electrolytic cell
- D.
  
  Leclanche cell
5.

The tip and morphology of the crack due to SCC phenomenon will be
- A.
  
  Sharp and transgranular
- B.
  
  Blunt and intergranular
- C.
  
  Blunt and transgranular
- D.
  
  None of these
6.

Which of the following metal can be used for cathodic protection of steel
- A.
  
  Al
- B.
  
  Cu
- C.
  
  Ag
- D.
  
  Au
7.

In zinc – aluminium galvanic couple, when exposed to acidic solutions
- A.
  
  Zinc dissolves
- B.
  
  Aluminium dissolves
- C.
  
  Both dissolve
- D.
  
  None of these
8.

The equation for uniform corrosion is given by :
- A.
  
  Mpy = 534/(DAT)
- B.
  
  Mpy = 584/(DAT)
- C.
  
  Mpy = (DAT) / 534
- D.
  
  Mpy = (DAT) / 584
9.

Typical example for anodic metallic coating is
- A.
  
  Zn on Steel
- B.
  
  Cu on Steel
- C.
  
  Au on steel
- D.
  
  All of these
10.

Pourbaix diagram is a graphical plot of
- A.
  
  E Vs pH
- B.
  
  E Vs Log i
- C.
  
  E Vs time
- D.
  
  Current Vs Potential
11.

The terminology used for uniform corrosion of nickel and nickel base alloys is
- A.
  
  Tarnishing
- B.
  
  Fogging
- C.
  
  Dulling
- D.
  
  None of these
12.

Knife line attack in IGC refers to
- A.
  
  Low temperature HAZ
- B.
  
  High temperature HAZ
- C.
  
  Weld zone
- D.
  
  Base metal
13.

Pilling – Bedworth ratio is pertinent to
- A.
  
  Internal oxidation
- B.
  
  High temperature sulphidation
- C.
  
  Catastrophic oxidation
- D.
  
  High temperature oxidation
14.

When a non-metallic material forms a crevice on metallic surface it is known as
- A.
  
  Pitting
- B.
  
  Gasket
- C.
  
  Uniform
- D.
  
  Fretting
15.

The sensitization caused in stainless steel for IGC to occur is _____ to corrosive medium
- A.
  
  The prerequisite before exposure
- B.
  
  Post treatment after exposure
- C.
  
  Mere thermal cycle without exposure
- D.
  
  None of these
16.

The main cause for the IGC attack in SS is the formation of ____ at the grain boundary.
- A.
  
  Chromium carbide precipitate
- B.
  
  Titanium carbide
- C.
  
  Molybdenum carbide
- D.
  
  Tungsten carbide
17.

Experimental setup for stress corrosion cracking should involve ___ application of ultimate tensile stress.
- A.
  
  100%
- B.
  
  0%
- C.
  
  Less than 100%
- D.
  
  None of these
18.

The formation of horse-shoe pit is one of the methods of recognizing the occurrence of ____ corrosion.
- A.
  
  Pitting
- B.
  
  Galvanic
- C.
  
  Erosion
- D.
  
  Intergranular
19.

The phenomenon of corrosion that occurs on rail roads is _____
- A.
  
  Crevice
- B.
  
  Corrosion fatigue
- C.
  
  High temperature oxidation
- D.
  
  Fretting
20.

Catastrophic oxidation is exhibited by metals obeying ____ rate law kinetics.
- A.
  
  Logarithmic
- B.
  
  Parabolic
- C.
  
  Linear
- D.
  
  Cubic