Related Questions

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
Magnesite chrome bricks are used in the
A Roof lining of basic open hearth & other basic furnaces
B Reheating furnaces
C Soaking pits
D All of the above
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 of the above
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.
A Preheating
B Cooling
C Burning
D All of the above
Chrome magnesite bricks are
A Acidic in nature
B Neutral in nature
C Having higher RUL than silica bricks
D Made by mixing 30% chromite and 70% periclase
Magnesite chrome refractories
A Have better spalling resistance than chrome magnesite refractories
B Have very low thermal co-efficient of expansion
C Are not at all resistant to the corrosive action of iron oxide
D Have very low (50 kg/cm2) cold crushing strength (C.C.S.) and can not be used in metalcase form
Magnesite refractories are generally not used in the
A Electric furnace walls
B Steel melting furnace
C Open hearth furnace
D Burning zone of cement kilns
Magnesite bricks are used in those parts of furnaces, which are
A Subjected to temperature fluctuation
B Required to resist corrosive basic slag
C Subjected to high load
D None of these
Magnesite refractories are used for the construction of those furnaces, which are
A Not required to resist the corrosive action of basic slag
B Not subjected to fluctuation in temperature
C Used for raising & maintaining high temperature
D Both (B) and (C)
Which of the following impurities reduces the refractoriness of magnesite bricks?
A Al2O3
B CaO
C SiO2
D All of the above

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