Refractory Technology Objective Quiz Questions and Answers - 2

Question: 6

Sillimanite is a _____ refractory.

(A) High alumina

(B) Insulating

(C) Neutral

(D) Basic

Question: 7

High density refractory bricks have lower

(A) Slag penetration resistance

(B) Fusion point

(C) Thermal conductivity

(D) Spalling resistance

Question: 8

Which is not an alumino-silicate refractory?

(A) Tar dolomite bricks

(B) High alumina bricks

(C) Fireclay bricks

(D) Mullite bricks

Question: 9

Electrical resistor bars are made of

(A) Graphite

(B) Zirconia

(C) Alumina

(D) Silicon carbide

Question: 10

Carbon refractories are exclusively used in the

(A) Side wall of soaking pits

(B) Regeneration of coke oven

(C) Walls of coke oven

(D) Hearth of blast furnace