- (A) Hearth of soaking pits
- (B) Bottom hearth of reheating furnace
- (C) Coke oven regenerator
- (D) Burning zone of limestone rotary kilns
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- (A) Zirconia
- (B) Silicon carbide
- (C) Magnesia
- (D) None of these
- (A) Dome of blast furnace stoves
- (B) Electric arc furnace roof
- (C) Glass melting furnaces
- (D) All
- (A) Quartz
- (B) Cristobalite
- (C) Tridymite
- (D) None of these
- (A) Hearth of the blast furnace
- (B) Nuclear reactors, missiles & space crafts
- (C) Insulation of high temperature furnaces
- (D) Roof of electric furnaces
- (A) Low co-efficient of expansion
- (B) High RUL (1600°C) and refractoriness (> 2000°C)
- (C) High spalling resistance
- (D) All
- (A) Are bonded with lime and clay
- (B) (Free from silica) have better thermal fatigue resistance than silica and magnesite refractories.
- (C) Are resistant to basic slag
- (D) All
- (A) Zircon
- (B) Thoria
- (C) Carborundum
- (D) Beryllia
- (A) Muffle furnace
- (B) Zinc smelting furnace
- (C) Ceramic recuperators
- (D) All
- (A) Pug
- (B) Ball
- (C) Tube
- (D) Rod
