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 ?

Related Mcqs:

The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?

A. Fireclay B. Silica C. Magnesite D. Corundum...

Which is the stable form of silica upto 1470°C ?

A. Quartz B. Cristobalite C. Tridymite D. None of these...

Test piece for determination of RUL of a refractory is heated in a/an____________________?

A. Oxidising atmosphere B. Reducing atmosphere C. Electric furnace D. Neutral atmosphere...

Pyrometric cone equivalent (PCE) of a refractory is the measure of its_________________?

A. Spalling resistance B. Fusion point C. Resistance to slag penetration D. Resistance to carbon monoxide attack...

Thermal conductivity of refractory bricks_________________?

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...