- (A) Beryllia
- (B) Carborundum
- (C) Corundum
- (D) Thoria
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- (A) Higher firing temperature
- (B) Higher moulding pressure
- (C) Finer grog size
- (D) All
- (A) Thermal spalling
- (B) Slag attack
- (C) Fusion under load
- (D) CO attack
- (A) Protect the pump against developing excessive pressure
- (B) Facilitate unidirectional flow of liquid
- (C) Reduce the discharge pressure
- (D) Control the rate of discharge
- (A) 0.01 to 0.1
- (B) 0.1 to 2
- (C) 2 to 10
- (D) 10 to 100
- (A) Silicon carbide
- (B) Silicon nitride
- (C) Crystalline magnesia
- (D) Zirconium sulphate
- (A) Refractoriness
- (B) Melting point
- (C) Rate at which a fluid will pass through the pores
- (D) Expansion during heating
- (A) Blast furnace
- (B) Hot blast stove
- (C) Cupola
- (D) Wall of coke oven
- (A) Quartz
- (B) Cristobalite
- (C) Tridymite
- (D) All have the same specific gravity
- (A) Increases with decrease in porosity
- (B) Decreases with decreases in porosity
- (C) Is independent of its porosity and is maximum for insulating bricks
- (D) Increases with the amount of air entrapped in pores
