Refractory Technology Magnesite chrome refractories Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have better spalling resistance than chrome magnesite refractories Have very low thermal co-efficient of expansion ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone. Burning All of these Preheating Cooling Burning All of these Preheating Cooling ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be Oxidising Neutral Neither A nor B Either A or B Oxidising Neutral Neither A nor B Either A or B ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay bricks are never used in the Zinc roaster Lead blast furnace Beehive oven Coke oven walls Zinc roaster Lead blast furnace Beehive oven Coke oven walls ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns. 2400 1800 2700 2200 2400 1800 2700 2200 ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Maximum safe working temperature for fireclay bricks is about __________ °C. 1550 1300 1450 1150 1550 1300 1450 1150 ANSWER DOWNLOAD EXAMIANS APP
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