A. Oxidising
B. Neutral
C. Either A. or B.
D. Neither A. nor B.
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Related Mcqs:
- Segar cones are used for the determination of ____________ of refractories?
- A. Softening temperature B. Spalling resistance C. Electrical conductivity D. Resistance to slag attack...
- Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?
- A. 1800 B. 2200 C. 2400 D. 2700...
- Dilatometer is used for the determination of ______________ of refractories?
- A. Modulus of rupture B. Permanent linear change C. Resistance to CO attack D. RUL...
- Faster rate of drying of moulded refractories results in high _____________ of refractories?
- A. Green strength B. Voids C. Shrinkage D. Both B. and C....
- Carbon refractories have very high __________________?
- A. Wetting characteristics B. Refractoriness C. Thermal conductivity D. Both B. and C....
- Fireclay refractories have __________________?
- A. Low co-efficient of thermal expansion B. Poor thermal spalling resistance C. Tendency to expand unduly high during firing D. Very high cost...
- 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...
- Rate of slag attack on refractories increases with rise in temperature due to the___________________?
- A. Decreased viscosity of slag B. Increased thermal conductivity of brick C. Oxidising condition in the furnace D. None of these...
- 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...
- Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?
- A. Tar bonded dolomite bricks B. Fireclay bricks C. Mullite bricks D. Magnesite bricks...
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