- (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 cannot be used in metalcase form
Chemical Engineering Mcqs
- (A) Less shrinkage in heating, decreased apparent porosity & increased specific gravity
- (B) High strength & thermal spalling resistance
- (C) Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production
- (D) All
- (A) Spalling resistance
- (B) Fusion point
- (C) Resistance to slag penetration
- (D) Resistance to carbon monoxide attack
- (A) Spalling resistance
- (B) Refractoriness
- (C) Crushing strength
- (D) Resistance to slag
- (A) Tar bonded dolomite bricks
- (B) Fireclay bricks
- (C) Magnesite bricks
- (D) Chromite bricks
- (A) Mullite
- (B) Corundum
- (C) Bauxite
- (D) Dolomite
- (A) 450
- (B) 250
- (C) 150
- (D) 65
- (A) High duty fireclay
- (B) Silica
- (C) Mullite
- (D) Carborundum
- (A) Increases
- (B) Decreases
- (C) Remain constant
- (D) May increase or decrease; depends on its alumina content
- (A) Silica bricks
- (B) Low duty firebricks
- (C) High alumina bricks
- (D) Graphite blocks
