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

Question: 2

Which of the following is an acid flux?

(A) CaF₂

(B) CaO

(C) MnO

(D) SiO₂

Question: 3

A _____ furnace is used for smelting of lead ores.

(A) Crucible

(B) Reverberatory

(C) Blast

(D) Rotary

Question: 4

Sphalerite the main ore of

(A) Zinc

(B) Lead

(C) Tin

(D) Cadmium

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