Refractory Technology MCQs

212 MCQs — Chemical Engineering MCQs (Page 1 of 22)

Practice Refractory Technology MCQs with correct answers and explanations. These questions are from the Chemical Engineering MCQs section.

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Chemical Engineering Subcategories

Chemical Engineering	Chemical Environmental Engineering
Chemical Reaction	Fertilizer Technology
Fluid Mechanics for Chemical	Fuels and Combustion
Materials and Construction	Polymer Technology
Refractory Technology	Thermodynamics for Chemical

Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about ______________ percent?

A. 5
B. 20
C. 35
D. 55

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In chemical process equipments, the conical bottom heads used, usually has an apex angle of____________________?

A. 20°
B. 40°
C. 60°
D. 80°

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Si percentage in silica refractories used in the walls of coke oven is about______________________?

A. 45
B. 60
C. 80
D. 95

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Chrome magnesite bricks are_________________?

A. Acidic in nature
B. Neutral in nature
C. Having higher rul than silica bricks
D. Made by mixing 30% chromite and 70% periclase

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Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as ______________ percent?

A. 10
B. 15
C. 20
D. 30

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

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

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Lower part of hot metal mixer are lined with _____________ bricks?

A. Superduty fireclay
B. High alumina
C. Silica
D. Carborundum

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Bauxite calcining rotary kilns are lined with ________________ bricks?

A. Fireclay
B. Carbon
C. 85% alumina
D. Corundum

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Spalling of a refractory means its____________________?

A. Softening
B. Fracture due to uneven expansion at high temperature
C. Resistance to compressive loads
D. Resistance to chemical action of gases and molten fluxes

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The linear thermal expansion of _______________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent?

A. Fireclay
B. Silica
C. Magnesite
D. Corundum

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