Refractory Technology

A. Less fusion point
B. Better spalling resistance
C. Both A. and B.
D. Neither A. not B.

A. Preheating
B. Cooling
C. Burning
D. All the above

A. High thermal conductivity
B. Low porosity
C. Non-wetting characteristics
D. High density

A. 80 and 20
B. 20 and 80
C. 50 and 50
D. 60 and 40

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

A. Zirconia
B. Silicon carbide
C. Magnesia
D. None of these

A. Dome of blast furnace stoves
B. Electric arc furnace roof
C. Glass melting furnaces
D. All A., B. and C.

A. Cooling down
B. Warming up
C. Both A. & B.
D. Neither A. nor B.

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

A. Hearth of the blast furnace
B. Nuclear reactors, missiles & space crafts
C. Insulation of high temperature furnaces
D. Roof of electric furnaces