A. Contains both alumina and silica
B. Is crushed firebrick
C. Is a non-plastic material
D. All A., B. and C.
Related Mcqs:
- Spalling of a refractory means its____________________?
A. Softening
B. Fracture due to uneven expansion at high temperature
C. Resistance to compressive loads
D. Resistance to chemical action of gases and molten fluxes - Chrome magnesite bricks are used in the_________________?
A. Side walls of soaking pits and arc furnaces
B. Copper melting furnaces & converters
C. Burner block of glass tanks
D. All A., B. and C. - Which is not a basic refractory ?
A. Chrome magnesite
B. Magnesite
C. Dolomite
D. Silicon carbide - 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 - Which of the following is not a neutral refractory ?
A. Silicon carbide
B. Magnesite
C. Chromite
D. Graphite - A steel member used in the furnace construction to take the thrust of the brickwork is called___________________?
A. Buckstay
B. Breast wall
C. Armouring
D. Baffle - Roof of a basic electric furnace is made of _____________ bricks?
A. Superduty fireclay
B. Silica
C. Chromite
D. None of these - Which furnace consumes maximum refractory annually in an integrated steel plant ?
A. Soaking pit
B. Blast furnace
C. L.D. converter
D. Coke ovens - PCE value (Segar cone) of Superduty refractories is more than 33, which is equivalent to a temperature of ____________ °C?
A. 1520
B. 1630
C. 1670
D. 1730 - Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of________________?
A. Fireclay
B. Silicon carbide
C. Corundum
D. Siliceous fireclay
