Firing temperature is minimum (1250-1400 °C) for _______________ bricks?

Related Mcqs:

1. Firing temperature of magnesite bricks is about _____________ °C?

   A. 800-1000
   B. 1000-1200
   C. 1600-1800
   D. 2400-2600

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

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

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. The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?

   A. Fireclay
   B. Silica
   C. Magnesite
   D. Corundum

5. High porosity refractory bricks have _______________?

   A. Poor resistance to the penetration of molten slag, metal & flue gases
   B. Poor heat conductivity & low strength
   C. Better thermal spalling resistance
   D. All A., B. and C.

6. 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

7. Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material ?

   A. Aluminium phosphate
   B. Water
   C. Lime
   D. Plaster of Paris

8. Maximum safe working temperature for fireclay bricks is about __________ °C?

   A. 1150
   B. 1300
   C. 1450
   D. 1550

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

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

10. An indication of degree of firing in silica brick is its____________________?

    A. Specific gravity
    B. Fusion point
    C. RUL
    D. None of these