Maximum alumina content in high alumina refractory can be as high as _____________ percent?

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....

Refractories are dried in the _______________?

A. Rotary kilns B. Tunnel kilns C. Sun D. None of these...

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...

______________ bricks should not be used in oxidising atmosphere?

A. Tar dolomite B. Carbon C. Silica D. Fireclay...