Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?

A. Preheating
B. Cooling
C. Burning
D. All the above

A. Increases with rise in service temperature
B. Decreases with rise in service temperature
C. Is unaffected with change in service temperature
D. Decreases with increase in porosity

A. Spalling resistance
B. Thermal conductivity
C. Fusion point
D. Slag penetration resistance

A. Dehydrate the dried refractory
B. Develop stable mineral forms in them
C. Form ceramic bonds necessary for development of high crushing strength in the finished
product
D. All A., B. and C.

A. Fireclay
B. Silica
C. Chrome magnesite
D. Zirconia

A. Refractoriness
B. Melting point
C. Rate at which a fluid will pass through the pores
D. Expansion during heating