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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 1
26.
Thermal diffusivity of a refractory brick is high, when its __________ is high.
density
specific heat
thermal conductivity
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
High porosity refractory bricks have
poor resistance to the peneration of molten slag, metal & flue gases.
poor heat conductivity & low strength.
better thermal spalling resistance.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Vacuum steel degassing units are lined with
silica bricks
low duty firebricks
high alumina bricks
graphite blocks
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.
1520
1630
1670
1730
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Which is the stable form of silica below 870°C ?
Tridymite
Cristobalite
Quartz
None of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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