Iron content in Indian iron ore is about __________ percent.
80-85
60-65
40-45
20-25
- The main charge in blast furnace is usually
- Which of the following materials has the least scrap value?
- Maraging steels derive their strength from the following mechanism:
- __________ of air does not increase with increase in temperature.
- The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
- Electrometallurgical methods of metal extraction is normally used for those metals
- Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
- The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
- Which of the following is the most wear resistant grade of carbide used for the cutting tools?
- Minimum thermal efficiency of a steam boiler may be around __________ percent
- Density in the solid state is slightly less than that in its liquid state, in case of
- Normalising of a casting does not
- Satellites burn off during re-entry to earth's atmosphere, because of the
- Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts…
- Boiler tube size is specified by its thickness and __________ diameter.
- Broaching tools are usually made of
- The leaching solvent used in Baeyer's process for the purification of bauxite is
- Carbon is present in the form of __________ in grey cast iron.
- The 'laughing gas' is
- Optical activity is a/an __________ property.
- Change in volume of metals from absolute zero temperature to their melting points is
- Which of the following represents the correct time-temperature curve when a block of metal is heated…
- In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
- __________ stress cannot be sustained by a fluid in equilibrium.
- Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent…
- Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
- Consumable electrodes are used in the __________ welding.
- Dielectric
- Transformer cores are normally made from
- Between 230 and 370°C, blue brittleness is caused in mild steel because of the