Related Questions

An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
A Mortars
B Cements
C Castables
D None of these
If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
Which is not an acidic refractory?
A Silica
B Fireclay
C High alumina refractory
D Carbon black
Which is an acidic refractory?
A Magnesite
B Dolomite
C Fireclay
D Chrome magnesite
Fusion point of an acidic refractory material is
A Increased by the addition of basic oxides
B Reduced by the addition of basic oxides
C Not affected by the addition of basic oxides
D Not affected by the addition of basic oxides
Which of the following is not a high alumina refractory material?
A Kyanite
B Sillimanite
C Diaspore
D Periclase
Which of the following is not a neutral refractory?
A Silicon carbide
B Magnesite
C Chromite
D Graphite
Which is not a basic refractory?
A Chrome magnesite
B Magnesite
C Dolomite
D Silicon carbide
Which is not an alumino-silicate refractory?
A Fireclay bricks
B Mullite bricks
C Tar dolomite bricks
D High alumina bricks

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