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

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) 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...

3. Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2. On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as ______________ kg/cm2?

   A. 450 B. 250 C. 150 D. 65...

4. Cold crushing strength of fireclay bricks is about ______________ kgf/cm2?

   A. 50-100 B. 100-150 C. 200-400 D. 500-1000...

5. 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...

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

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

7. High refractoriness of refractory bricks means, that it has a________________?

   A. High spalling resistance B. Low spalling resistance C. High resistance to fusion D. Low porosity...

8. Fireclay bricks are never used in the______________?

   A. Beehive oven B. Coke oven walls C. Zinc roaster D. Lead blast furnace...

9. Colour of fireclay bricks is_________________?

   A. Light buff to reddish buff B. Yellow C. Black D. None of these...

10. Fireclay bricks are used in the__________________?

    A. Coke ovens regenerator B. Outer lining of L.D. converter C. Hearth bottom of blast furnace D. Coke oven walls...