Which of the following bricks has the most close values of RUL and PCE ?

Related Mcqs:

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

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

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

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

3. Semi-silica bricks compared to silica bricks have_______________?

   A. Less fusion point B. Better spalling resistance C. Both A. and B. D. Neither A. not B....

4. Pyrometric cone equivalent (PCE) value (Segar cone) of ‘Superduty refractories’ is more than 33 which corresponds to a temperature of _____________ °C?

   A. 1520 B. 1630 C. 1670 D. 1730...

5. Pyrometric cone equivalent (PCE) of a refractory is the measure of its_________________?

   A. Spalling resistance B. Fusion point C. Resistance to slag penetration D. Resistance to carbon monoxide attack...

6. PCE value (Segar cone) of Superduty refractories is more than 33, which is equivalent to a temperature of ____________ °C?

   A. 1520 B. 1630 C. 1670 D. 1730...

7. RUL of refractories depends on the _____________________?

   A. Chemical composition B. Physical structure C. Presence of impurities like iron & alkali D. All A., B. and C....

8. 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...

9. 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...

10. Which of the following impurities reduces the refractoriness of magnesite bricks ?

    A. Al2O3 B. CaO C. SiO2 D. All A., B. & C....