A. Does not react with basic slags
B. Is produced from baddeleyite
C. Cannot be used as an insulator
D. Has poor electrical conductivity at high temperature
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Related Mcqs:
- Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory_________________?
- A. Mortars B. Cements C. Castables D. None of these...
- Zirconia refractories are not used in_____________________?
- A. Making sheaths for thermocouple B. Lining high temperature ceramic kilns C. Furnaces subjected to fluctuating temperature D. High frequency induction furnaces in the form of inductors...
- Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?
- A. 1800 B. 2200 C. 2400 D. 2700...
- Machine moulding of dry mixture of refractories requires a pressure of the order of _____________ kg/cm2?
- A. 10 B. 100 C. 500 D. 1000...
- Which is the stable form of silica upto 1470°C ?
- A. Quartz B. Cristobalite C. Tridymite D. None of these...
- Fireclay bricks are never used in the______________?
- A. Beehive oven B. Coke oven walls C. Zinc roaster D. Lead blast furnace...
- High density refractory bricks have lower__________________?
- A. Spalling resistance B. Thermal conductivity C. Fusion point D. Slag penetration resistance...
- . Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2) is ______________ °C?
- A. 500 B. 1000 C. >1350 D. >2000...
- Colour of fireclay bricks is_________________?
- A. Light buff to reddish buff B. Yellow C. Black D. None of these...
- Fireclay bricks are used in the__________________?
- A. Coke ovens regenerator B. Outer lining of L.D. converter C. Hearth bottom of blast furnace D. Coke oven walls...
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