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

Related Mcqs:

1. Which of the following does not occur during firing/burning of refractories ?

   A. Removal of water of hydration B. Vitrification C. Decrease in crushing strength D. Development of stable mineral form...

2. The maximum linear expansion of silica bricks during firing is about ______________ percent?

   A. 0.5 B. 1 C. 2 D. 3.5...

3. Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?

   A. 55 B. 70 C. 80 D. 90...

4. Faster rate of drying of moulded refractories results in high _____________ of refractories?

   A. Green strength B. Voids C. Shrinkage D. Both B. and C....

5. Refractories are dried in the _______________?

   A. Rotary kilns B. Tunnel kilns C. Sun D. None of these...

6. Maximum alumina content in high alumina refractory can be as high as _____________ percent?

   A. 30 B. 50 C. 70 D. 90...

7. Maximum water percentage in refractory mix meant for hand moulding may be as high as _____________ percent?

   A. 2-3 B. 5-7 C. 7-12 D. 14-20...

8. Most Cermets, which normally have high thermal conductivity and high thermal shock resistance, comprises of ceramic & metallic components of ______________ percent respectively?

   A. 80 and 20 B. 20 and 80 C. 50 and 50 D. 60 and 40...

9. Which brick undergoes maximum shrinkage on drying ?

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

10. Porosity of fireclay refractories is _______________ percent?

    A. 5-10 B. 10-25 C. 25-35 D. 35-50...