Important Questions related to Corrosion | Module 6 Chapter 4
Question 1/31
_______ is the electrochemical deterioration of a metal
A. Galvanization
B. electroplating
C. Corrosion
D. None
Question 2/31
In an electrochemical corrosion,_______ has a tendency to corrode
A. Anode
B. Cathode
C. Both
D. none
Question 3/31
The rate of corrosion is influenced by _________
A. Type of metal
B. Temperature
C. Presence of dissimilar metals
D. All
Question 4/31
Aluminium and magnesium alloys are prone to corrosive attack by many _______ solution
A. Acidic
B. Alkaline
C. Both
D. none
Question 5/31
uniform each or uniform attack corrosion is also known as …..
A. Pitting corrosion
B. General surface corrosion
C. Concentration cell corrosion
D. None
Question 6/31
Ideal growth condition for micro organism corrosion are ……… temperature ……… relative humidity.
A. 68 to 104 deg F and 89% to 100%
B. 60 to 100 deg.F and 85% to 100%
C. 65 to 104 deg.F and 75 % to 90%
D. None
Question 7/31
Microbial growth should be removed with ………… brush and water.
A. Steel wire brush
B. Non-metallic brush
C. Copper wire brush
D. None
Question 8/31
……….. corrosion is one of the most destructive and intense form of corrosion
A. Concentration cell
B. Filiform
C. Pitting
D. all
Question 9/31
Crevice corrosion is also known as …..
A. Surface corrosion
B. Concentration cell corrosion
C. Pitting corrosion
D. Filiform corrosion
Question 10/31
It is recognized by warm like trace of corrosion product beneath the painted surface
A. Pitting corrosion
B. Filiform corrosion
C. Surface corrosion
D. None
Question 11/31
Polyurethane finishes especially susceptible to ______ corrosion
A. Crevice
B. Pitting
C. Filiform
D. Galvanic
Question 12/31
This corrosion can be removed using glass head blasting or sanding
A. Pitting
B. Filiform
C. Crevice
D. Galvanic
Question 13/31
A corrosion attack on gain boundaries of a metal is called —-
A. Crevice corrosion
B. Surface corrosion
C. Intergranular corrosion
D. Stress corrosion
Question 14/31
Exfoliation corrosion is an advanced form of _____ corrosion
A. Crevice
B. Intergranular
C. Filiform
D. Pitting
Question 15/31
If a bolt is overtorqued _______ corrosion can happen
A. Galvanic
B. Crevice
C. Stress
D. Pitting
Question 16/31
Methyl alcohol-hydrochloric acid solution will cause stress corrosion working of _____ alloy
A. Aluminium
B. Magnesium
C. Titanium
D. None
Question 17/31
________ corrosion involves cyclic stress and corrosive environment
A. Galvanic
B. Stress
C. Fatigue
D. Pitting
Question 18/31
________ corrosion failure occurs in two stages
A. Fatigue
B. Stress
C. Fretting
D. Exfoliation
Question 19/31
Fretting corrosion is also known as _______
A. Wear corrosion
B. Friction oxidation
C. Fatigue corrosion
D. Both (A) and (B) are correct
Question 20/31
Smoking rivet is an example of ________ corrosion
A. Fatigue
B. Fretting
C. Galvanic
D. Surface
Question 21/31
Calcium plating is used for both steel and _________ alloy to protect from corrosion
A. Nickle
B. Copper
C. Aluminium
D. None
Question 22/31
Cleaning of Nickle _________ cadmium battery compartment should be done with .
A. Ammonia
B. Boric acid
C. Sodium bicarbonate
D. Both (A) and (B)
Question 23/31
Piano – type hinges are prime spots for corrosion due to ________
A. Dissimilar metal contact
B. Continuous friction
C. Natural traps for dirt ,salt and moisture
D. Both (A) and (C)
Question 24/31
Heavy or thick section of heat treated aluminium alloy are susceptible to __________ corrosion
A. Surface
B. Intergranular
C. Galvanic
D. None
Question 25/31
Composite such as graphite\epoxy create ___________ corrosion
A. Pitting
B. Galvanic
C. Surface
D. All
Question 26/31
The type of corrosion which penetrate the metal
A. pitting corrosion
B. stress corrosion
C. crevice corrosion
D. Galvanic
Question 27/31
The type of corrosion required complete disassembly ?
A. Dissimillar metal corrosion
B. intergranular corrosion
C. surface corrosion
D. Pitting
Question 28/31
Corrosion of Titanium is cleaned by: –
A. Hand polish with Al-polish and mild abrasive paper
B. Hand wire brush and mild abrasive paper
C. Using a stiff and hog bristle brush
D. Use of small power buffers and buffing compound
Question 29/31
Visual appearance of corrosion is: –
A. Reddish or black deposits in Carbon steel
B. Reddish or black deposits in Steel
C. Reddish or black deposits in Copper
D. Reddish or black deposits in Corrosion resistant steels
Question 30/31
Fretting corrosion normally found on: –
A. Around rivets in skin
B. Integral fuel tanks
C. Trailing edge of primary controls
D. All is correct
Question 31/31
Fretting corrosion normally found on: –
A. Around rivets in skin
B. Integral fuel tanks
C. Trailing edge of primary controls
D. All is correct
ALSO READ : Module 8 chapter 1 Important Questions
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