7000+ Extractive Metallurgy Objective Questions for GATE, SAIL Exam - 1

Question: 1

Anode and cathode in the aluminium reduction cell are made respectively of

(A) Aluminium and carbon

(B) Carbon and iron bar

(C) Carbon and aluminium

(D) Iron bar and carbon

Ans: B

Carbon and iron bar

Question: 2

Which of the following is an acid flux?

(A) CaF2

(B) CaO

(C) MnO

(D) SiO2

Ans: D


Question: 3

A _____ furnace is used for smelting of lead ores.

(A) Crucible

(B) Reverberatory

(C) Blast

(D) Rotary

Ans: C


Question: 4

Sphalerite the main ore of

(A) Zinc

(B) Lead

(C) Tin

(D) Cadmium

Ans: A


Question: 5

Which of the following does not offer an effective protective coating against corrosion of iron (as being evident from electromotive series of metals)?

(A) Nickel

(B) Tin

(C) Chromium

(D) Zinc

Ans: A


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