A. Tar bonded dolomite bricks
B. Fireclay bricks
C. Mullite bricks
D. Magnesite bricks
A. Rotary kilns
B. Tunnel kilns
C. Sun
D. None of these
Refractories are dried in the _______________? Read More »
Refractory Technology A. Silicon carbide
B. Alumina
C. Zirconia
D. Graphite
Electrical resistor bars are made of _______________? Read More »
Refractory Technology A. Fireclay
B. Direct bonded basic
C. Silica
D. Magnesite
Firing temperature is minimum (1250-1400 °C) for _______________ bricks? Read More »
Refractory Technology A. Silicon carbide
B. Magnesite
C. Chromite
D. Graphite
Which of the following is not a neutral refractory ? Read More »
Refractory Technology A. Tridymite
B. Cristobalite
C. Quartz
D. None of these
Which is the stable form of silica below 870°C ? Read More »
Refractory Technology A. High porosity
B. Low thermal conductivity
C. Both A. and B.
D. Neither A. not B.
Insulating refractories should have_______________? Read More »
Refractory Technology A. Decreases linearly
B. Remains unchanged
C. Increases
D. Decreases
With increase in the alumina content in firebricks, its fusion point (refractoriness) ? Read More »
Refractory Technology A. 1380
B. 1520
C. 1710
D. 1915
A. Fireclay
B. Carborundum
C. Graphite
D. Chromite
