Fireclay bricks are not used in the________________?

Related Mcqs:

1. Fireclay bricks is not used for lining the_______________?

   A. Cupola
   B. Gas producer
   C. Bottom of hot metal mixer
   D. Roof of open hearth furnace

2. Fireclay bricks are not used in the_________________?

   A. Blast furnace
   B. Hot blast stove
   C. Cupola
   D. Wall of coke oven

3. 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

4. With increase in the porosity, thermal spalling resistance of fireclay brick_______________?

   A. Increases
   B. Decreases
   C. Remain same
   D. May increase or decrease

5. Fireclay refractories___________________?

   A. Are not resistant to the action of basic slags
   B. Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming
   fusible aluminates silicates etc
   C. Shrink during firing
   D. All A., B. and C.

6. Silica bricks are never used for lining the_________________?

   A. Beehive coke ovens
   B. By-product coke ovens
   C. Dome of blast furnace stoves
   D. Roof of open hearth furnace

7. Permeability of bricks is a measure of the___________________?

   A. Refractoriness
   B. Melting point
   C. Rate at which a fluid will pass through the pores
   D. Expansion during heating

8. Refractory bricks with lower permeability is produced by using _________________?

   A. Higher firing temperature
   B. Higher moulding pressure
   C. Finer grog size
   D. All A., B. and C.

9. An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?

   A. Cork
   B. Saw dust
   C. Sand
   D. Chemically prepared foam

10. Roof of a basic electric furnace is made of ______________ bricks?

    A. Superduty fireclay
    B. Silica
    C. Chromite
    D. None of these