Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?

Related Mcqs:

1. 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

2. 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

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

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

5. Addition of zircon to silica refractory brick improves its_____________________?

   A. Crushing strength
   B. Resistance to slag attack
   C. Both A. and B.
   D. Neither A. nor B.

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. 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

8. Segar cones are used for the determination of ____________ of refractories?

   A. Softening temperature
   B. Spalling resistance
   C. Electrical conductivity
   D. Resistance to slag attack

9. 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

10. Fusion temperature of pure silica (SiO2) is _______________ °C?

    A. 1350
    B. 1715
    C. 2570
    D. 2800