7000+ Metallurgy and Corrosion MCQ Questions and Answers - 2

Question: 6

Cavitation corrosion is categorised as the _____ corrosion.

(A) Uniform

(B) Stress

(C) Erosion

(D) Galvanic

Question: 7

Which of the following metals is not used for coating of the base metal to guard it against corrosion?

(A) Aluminium

(B) Cadmium

(C) Lead

(D) Magnesium

Question: 8

Caustic embrittlement of boiler tubes is an example of

(A) Crevice corrosion

(B) Erosion corrosion

(C) Stress corrosion

(D) Dezincification

Question: 9

The most common inorganic corrosion inhibitor used in automobile cooling system is

(A) Borax

(B) Morpholine

(C) Calgon

(D) Oleic acid

Question: 10

Hoope’s cell is predominantly used for the electrolytic refining of

(A) Aluminium

(B) Tin

(C) Copper

(D) Zinc