RUL of refractories depends on the _____________________?

Related Mcqs:

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

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

2. 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...

3. Test piece for determination of RUL of a refractory is heated in a/an____________________?

   A. Oxidising atmosphere B. Reducing atmosphere C. Electric furnace D. Neutral atmosphere...

4. Refractoriness under load (RUL) is the most important property for the refractory bricks_________________?

   A. At the hearth bottom of the furnace on which stock is placed B. Used for furnace insulation C. Used in the roof of the furnace D. None of these...

5. . Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2) is ______________ °C?

   A. 500 B. 1000 C. >1350 D. >2000...

6. Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?

   A. Fireclay B. Silica C. Dolomite D. Very low alumina...

7. Cold crushing strength of refractories depends upon its_________________?

   A. Composition B. Texture C. Firing temperature D. All A., B. and C....

8. 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...

9. Magnesite refractories have low resistance to___________________?

   A. Attack by basic slag B. Abrasion C. Disintegration on sudden change of temperature D. Both B. and C....

10. Pure oxide refractories are generally monocrystalline in nature and are self bonded _______________ bricks are generally used as moderator in nuclear reactors?

    A. Beryllia B. Carborundum C. Corundum D. Thoria...