The highest melting pure oxide (m.p. > 3000°C)is___________________?

Related Mcqs:

In chemical process equipments, the conical bottom heads used, usually has an apex angle of____________________?

A. 20° B. 40° C. 60° D. 80°...

Zirconia refractory_________________?

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...

Chrome magnesite brick is not used for lining the___________________?

A. Hearth of soaking pits B. Bottom hearth of reheating furnace C. Coke oven regenerator D. Burning zone of limestone rotary kilns...

Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the_________________?

A. Washing action of metal B. Corrosion by layer of slag C. Both A. & B. D. Neither A. nor B....

Walls, roofs & combustion chambers of annealing furnaces are made of ______________ bricks?

A. High duty fireclay B. Silica C. Mullite D. Carborundum...