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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 4
46.
To resist spalling tendency, a refractory should have
greater diffusivity.
low specific heat.
low thermal co-efficient of expansion.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Cold crushing strength of fireclay bricks is about __________ kgf/cm2.
50-100
100-150
200-400
500-1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Spalling tendency of refractories is reduced by increasing its
porosity
specific gravity
thermal conductivity
strength
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Carbon refractories are exclusively used in the
hearth of blast furnace.
walls of coke oven.
regenerators of coke oven.
side wall of soaking pits.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Spalling of a refractory means its
softening.
fracture due to uneven expansion at high temperature.
resistancce to compressive loads.
resistance to chemical action of gases and molten fluxes.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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