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
Chrome magnesite brick is not used for lining the___________________? Read More »
Refractory Technology A. Zirconia
B. Silicon carbide
C. Magnesia
D. None of these
_____________ is not a single oxide-refractory? Read More »
Refractory Technology A. Dome of blast furnace stoves
B. Electric arc furnace roof
C. Glass melting furnaces
D. All A., B. and C.
High alumina refractories are used in the ___________________? Read More »
Refractory Technology A. Cooling down
B. Warming up
C. Both A. & B.
D. Neither A. nor B.
Thermal spalling mainly occurs during _____________ of furnaces? Read More »
Refractory Technology A. Quartz
B. Cristobalite
C. Tridymite
D. None of these
Which is the stable form of silica upto 1470°C ? Read More »
Refractory Technology A. Hearth of the blast furnace
B. Nuclear reactors, missiles & space crafts
C. Insulation of high temperature furnaces
D. Roof of electric furnaces
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.
Zircon refractories have__________________? Read More »
Refractory Technology