1] 50% alumina and 20% calcium oxide
2] 45% calcium oxide and 35% silica
3] 25% calcium oxide and 15% silica
4] 25% magnesia and 15% silica
The correct Answer Is
2] 45% calcium oxide and 35% silica
2] 45% calcium oxide and 35% silica
3] 25% calcium oxide and 15% silica
4] 25% magnesia and 15% silica
The correct Answer Is
2] 45% calcium oxide and 35% silica