7000+ GATE Metallurgy Question Paper with Solution Pdf - 2

Question: 6

Refractory bricks having lower porosity have

(A) Greater strength

(B) Low thermal conductivity

(C) Low heat capacity

(D) High insulating properties

Question: 7

Dynamometer is used for the determination of _____ of refractories.

(A) RUL

(B) Resistance to CO attack

(C) Modulus of rupture

(D) Permanent linear change

Question: 8

Hot metal runner in the blast furnace are lined with the _____ bricks.

(A) Fireclay

(B) Magnesite

(C) Silica

(D) Carborundum

Question: 9

Carborundum used for making crucibles for melting non ferrous metals is chemically

(A) Crystalline magnesia

(B) Zirconium sulphate

(C) Silicon carbide

(D) Silicon nitride

Question: 10

Which is not a basic refractory?

(A) Silicon carbide

(B) Dolomite

(C) Magnesite

(D) Chrome magnesite