Chemical Engineering Subcategories

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

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

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

A. 20°
B. 40°
C. 60°
D. 80°

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

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

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

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

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

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

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

Bauxite calcining rotary kilns are lined with ________________ bricks?

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

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

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