A. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
B. Iron impregnated with resin (usually Bakelite)
C. Carbon free iron
D. None of these
Related Mcqs:
- Coke oven walls are lined with _____________ bricks?
A. Silica
B. Tar-dolomite
C. Low thermal conductivity
D. Fire clay - Coke oven regenerators are made of ______________ bricks?
A. Fire clay
B. Silica
C. Low thermal conductivity
D. High electrical conductivity - ______________ iron is produced, when molten pig iron is allowed to cool gradually?
A. White cast
B. Grey cast
C. Wrought
D. None of these - White cast iron as compared to grey cast iron is ________________?
A. More durable
B. Very brittle
C. Very hard
D. All A., B. & C. - _____________ iron is produced, when molten pig iron is chilled suddenly?
A. White cast
B. Grey cast
C. Wrought
D. None of these - The impure iron (pig iron) that is tapped out from blast furnace contains about _____________ percent carbon?
A. 0.2
B. 2
C. 4
D. 8 - Galvanised iron is___________________?
A. Harder
B. Protected from rusting
C. Alumina coated iron
D. None of these - Beehive coke ovens are made of ________________ bricks?
A. Silica
B. Fireclay
C. Silicon carbide
D. Corundum - Gas holder of a gobar (cow-dung) gas plant is made of___________________?
A. Molybdenum stainless steel
B. Tin
C. Mild steel
D. Aluminium - Wrought iron is ____________________?
A. High carbon iron
B. Highly resistance to acid corrosion
C. Malleable & ductile; and hence is used for chain links, hooks & couplings
D. An alloy of iron, chromium & carbon
