Chemical Engineering - Refractory Technology

36. 

Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?

A. Soaking pits
B. Ceheating furnace
C. L.D. converter
D. Rotary lime kiln

Answer: Option C

Explanation:

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37. 

__________ nozzles are used in continuous casting of steel,

A. Zircon
B. Thoria
C. Carborundum
D. Beryllia

Answer: Option A

Explanation:

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38. 

silicon carbide refractories have very low

A. refractoriness (< 1700°C).
B. thermal conductivity.
C. resistance to thermal shock.
D. none of these.

Answer: Option D

Explanation:

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39. 

Basic bricks are not made of

A. fireclay
B. magnesite
C. foresterite
D. chromite

Answer: Option A

Explanation:

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40. 

With increase in the alumina content in firebricks, its fusion point (refractoriness)

A. decreases linearly
B. remains unchanged
C. increases
D. decreases

Answer: Option C

Explanation:

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