Which is not an alumino-silicate refractory ?

A. Tar bonded dolomite bricks
B. Fireclay bricks
C. Magnesite bricks
D. Chromite bricks

A. 0
B. <1
C. 1
D. >1

A. Fusion point
B. Spalling resistance
C. Slag penetration resistance
D. Refractoriness under load (RUL)

A. Furnaces allowed to cool frequently
B. Flues
C. Chimney linings
D. All A., B. and C.

A. Pug
B. Ball
C. Tube
D. Rod

A. 10
B. 100
C. 500
D. 1000