The largest consumer of refractories is the _______________ industry?

Related Mcqs:

1. Faster rate of drying of moulded refractories results in high _____________ of refractories?

   A. Green strength
   B. Voids
   C. Shrinkage
   D. Both B. and C.

2. Refractories are dried in the _______________?

   A. Rotary kilns
   B. Tunnel kilns
   C. Sun
   D. None of these

3. Refractoriness/fusion points of ‘Superduty’ refractories is _______________ °C?

   A. 1520-1630
   B. 1630-1670
   C. > 1730
   D. > 2000

4. Presence of MgO in alumino-silicate refractories _______________ its refractoriness?

   A. Increases
   B. Lowers
   C. Does not affect
   D. Either A. or B.; depends on its quantity

5. Porosity of fireclay refractories is _______________ percent?

   A. 5-10
   B. 10-25
   C. 25-35
   D. 35-50

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. Silicon carbide refractories are used in the _____________?

   A. Muffle furnace
   B. Zinc smelting furnace
   C. Ceramic recuperators
   D. All A., B. and C.

8. Insulating refractories should have_______________?

   A. High porosity
   B. Low thermal conductivity
   C. Both A. and B.
   D. Neither A. not B.

9. Magnesite refractories are used for the construction of those furnaces, which are________________?

   A. Not required to resist the corrosive action of basic slag
   B. Not subjected to fluctuation in temperature
   C. Used for raising & maintaining high temperature
   D. Both B. and C.

10. Zirconia refractories are not used in_____________________?

    A. Making sheaths for thermocouple
    B. Lining high temperature ceramic kilns
    C. Furnaces subjected to fluctuating temperature
    D. High frequency induction furnaces in the form of inductors