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 a basic refractory?
A Fireclay
B Silica
C Chrome magnesite
D None of these
Fusion point of a basic refractory material is
A Reduced by the addition of acid oxides
B Increased by the addition of acid oxides
C Not affected by the addition of acid oxides
D Always less than 1000°C
The refractory lining of the bottom in a basic electric arc furnace is made of
A Silica
B Alumina
C Magnesia
D Fireclay
what is the monthly salary of Rahman ? Statements : 1. Rahman's basic salary is Tk. 100 more Rajan's salary who also serves in Rahman's company. 2. Other allowances drawn by Rajan besides his basic salary are Tk. 2,000 per month which is TK. 50 less than Rahan's salary . 3. Rajan's basic salary is TK. 1550 per month.
A Only II
B Only II and III
C Only I and II
D All I , II and II
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 an acidic refractory?
A Silica
B Fireclay
C High alumina refractory
D Carbon black

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