- (A) Mortars
- (B) Cements
- (C) Castables
- (D) None of these
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- (A) Composite material containing both ceramic & metallic constituents
- (B) Having high strength & resistance to high temperature
- (C) Used in space vehicles, missiles & nuclear energy plants
- (D) All
- (A) Greater diffusivity
- (B) Low specific heat
- (C) Low thermal co-efficient of expansion
- (D) All
- (A) High spalling resistance
- (B) Low spalling resistance
- (C) High resistance to fusion
- (D) Low porosity
- (A) Increasing its porosity
- (B) Using a coarser grog during its manufacture
- (C) Decreasing its thermal co-efficient of expansion
- (D) Making it denser
- (A) High refractoriness
- (B) High resistance to spalling
- (C) High strength and density
- (D) All
- (A) Composition
- (B) Texture
- (C) Firing temperature
- (D) All
- (A) 8
- (B) 24
- (C) 44
- (D) 58
- (A) Are wetted by molten iron
- (B) Are used in the hearth of blast furnace
- (C) Are acidic in nature
- (D) All
- (A) Are stored under controlled temperature & humidity to avoid hydration
- (B) Are used in outer lining of L.D. converters
- (C) Have poorer hydration resistance than pitch bonded bricks
- (D) All
