Search
.Management Sciences
Category: Refractory Technology
Tar bonded dolomite bricks__________________?
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 A., B. and C.
Fireclay bricks are not used in the_____________________?
A. Blast furnace
B. Hot blast stove
C. Cupola
D. Wall of coke oven
Carbon bricks are not used in the lining of the_________________?
A. Combustion chamber of blast furnace stoves
B. Electric furnaces
C. Highly chemical resistant equipments
D. Blast furnace hearth
‘Spinel’, a refractory mineral is chemically represented as____________________?
A. MgAl2O4
B. MgAl2O3
C. MgSO4
D. MgAl2O3.2H2O
An ideal refractory should have high__________________?
A. Spalling rate
B. Fusion point
C. Shrinkage ability
D. None of these
Mixing of ground refractory material and water is done in a ______________ mill?
A. Pug
B. Ball
C. Tube
D. Rod
Which of the following bricks has the most close values of RUL and PCE ?
A. Silica bricks
B. Fireclay bricks
C. High alumina bricks
D. Tar dolomite bricks
‘Super refractories’ are made from pure____________________?
A. Carbides
B. Oxides
C. Borides
D. Nitrides
With increasing alumina content, the fusion point of high alumina refractories__________________?
A. Increases
B. Decreases
C. Remain constant
D. May increase or decrease; depends on its alumina content
Recent Comments