Highest melting (m.p = 3070°C) oxide refractory is__________________?

Related Mcqs:

Machine moulding of dry mixture of refractories requires a pressure of the order of _____________ kg/cm2?

A. 10 B. 100 C. 500 D. 1000...

Zircon refractories have__________________?

A. Low co-efficient of expansion B. High RUL (1600°C) and refractoriness (> 2000°C) C. High spalling resistance D. All A., B. and C....

Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?

A. Tar bonded dolomite bricks B. Fireclay bricks C. Mullite bricks D. Magnesite bricks...

Rate of slag attack on refractories increases with rise in temperature due to the___________________?

A. Decreased viscosity of slag B. Increased thermal conductivity of brick C. Oxidising condition in the furnace D. None of these...

Which is not a natural insulating material ?

A. Diatomaceous earth/kieselgur B. Asbestos C. Vermiculite D. None of these...