- (A) Acidic refractory
- (B) Neutral refractory
- (C) Basic refractory
- (D) Fired at a temperature of 600°C only
Chemical Engineering Mcqs
- (A) Has high fusion temperature (> 3000°C) but poor resistance to thermal shock
- (B) Has high resistance to basic slags
- (C) Which is expensive & radioactive, is used in crucibles for melting high purity metals
- (D) All
- (A) Shape
- (B) Composition
- (C) Firing temperature
- (D) Texture
- (A) Cristobalite
- (B) Tridymite
- (C) Quartz
- (D) None of these
- (A) 1150
- (B) 1300
- (C) 1450
- (D) 1550
- (A) Non-wetting characteristic
- (B) High thermal conductivity
- (C) High crushing strength
- (D) None of these
- (A) Light buff to reddish buff
- (B) Yellow
- (C) Black
- (D) None of these
- (A) Increases with rise in service temperature
- (B) Decreases with rise in service temperature
- (C) Is unaffected with change in service temperature
- (D) Decreases with increase in porosity
- (A) Cement
- (B) Metallurgical
- (C) Fertiliser
- (D) Power
- (A) Thoria
- (B) Alumina
- (C) Beryllia
- (D) Zirconia
