7000+ Metallurgy Multiple Choice Questions and Answers - 2

Question: 6

Leaching solvent used in Baeyer’s process for bauxite purification is

(A) Dilute H₂SO₄

(B) NaCl

(C) NH₂OH

(D) NaOH

Question: 7

Phosphor bronze is used for making

(A) Bearings

(B) Thermocouples

(C) Cutting tools

(D) Utensils

Question: 8

Which of the following is the softest material?

(A) Calcite

(B) Corrundum

(C) Fluorite

(D) Quartz

Question: 9

Which of the following alloying elements cannot impart high strength at elevated temperature to steel?

(A) Magnesium

(B) Nickel

(C) Manganese

(D) Silicon

Question: 10

Ferrite is a solid solution of carbide in

(A) Alpha iron

(B) Gamma iron

(C) Cementite

(D) Pearlite