Chemical Engineering Mcqs

Mullite is chemically represented by_________________?

• (A)  Al2O3. 2SiO2
• (B)  3Al2O3. 2SiO2
• (C)  Al2O3. SiO2
• (D)  2Al2O3. 3SiO2

Answer

Submitted By :Ali Uppal

Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?

• (A)  55
• (B)  70
• (C)  80
• (D)  90

Answer

Submitted By :Ali Uppal

Which one contains minimum percentage of SiO2 ?

• (A)  Firebrick
• (B)  Sillimanite
• (C)  Semi-silica
• (D)  Aluminous firebrick

Answer

Submitted By :Ali Uppal

___________________ is the measure of the strength of refractory under the combined effect of temperature & load ?

• (A)  Porosity
• (B)  RUL
• (C)  Specific gravity
• (D)  Thermal conductivity

Answer

Submitted By :Ali Uppal

Which of the following is not a high alumina refractory material ?

• (A)  Kyanite
• (B)  Sillimanite
• (C)  Diaspore
• (D)  Periclase

Answer

Submitted By :Ali Uppal

Which is an acidic refractory ?

• (A)  Magnesite
• (B)  Dolomite
• (C)  Fireclay
• (D)  Chrome magnesite

Answer

Submitted By :Ali Uppal

In panel test for spalling resistance, the average face temperature of panel assembly is maintained at ______________ °C for 24 hours?

• (A)  700
• (B)  1000
• (C)  1600
• (D)  2000

Answer

Submitted By :Ali Uppal

Fireclay bricks is not used for lining the__________________?

• (A)  Cupola
• (B)  Gas producer
• (C)  Bottom of hot metal mixer
• (D)  Roof of open hearth furnace

Answer

Submitted By :Ali Uppal

Silica bricks are never used for lining the____________________?

• (A)  Beehive coke ovens
• (B)  By-product coke ovens
• (C)  Dome of blast furnace stoves
• (D)  Roof of open hearth furnace

Answer

Submitted By :Ali Uppal

Refractory bricks having lower porosity have_________________________?

• (A)  High insulating properties
• (B)  Low heat capacity
• (C)  Low thermal conductivity
• (D)  Greater strength

Answer

Submitted By :Ali Uppal