A. 1520
B. 1630
C. 1670
D. 1730
Related Mcqs:
- 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 - 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 - Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?
A. 1380
B. 1520
C. 1710
D. 1915 - Segar cones are used for the determination of ____________ of refractories?
A. Softening temperature
B. Spalling resistance
C. Electrical conductivity
D. Resistance to slag attack - Refractoriness/fusion points of ‘Superduty’ refractories is _______________ °C?
A. 1520-1630
B. 1630-1670
C. > 1730
D. > 2000 - Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?
A. Fireclay
B. Silica
C. Dolomite
D. Very low alumina - Faster rate of drying of moulded refractories results in high _____________ of refractories?
A. Green strength
B. Voids
C. Shrinkage
D. Both B. and C. - Which of the following bricks has the most close values of RUL and PCE ?
A. Silica bricks
B. Fireclay bricks
C. High alumina bricks
D. Tar dolomite bricks - 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 - Furnace atmosphere for softening temperature determination of refractories (in which Seger Cones are placed) should be __________________?
A. Oxidising
B. Neutral
C. Either A. or B.
D. Neither A. nor B.
