Eutectoid composition of carbon steel at room temperature is
Cementite
Pearlite
Martensite
Ferrite
- Spark plug is provided in a/an
- Plasma is
- Which of the following hardness tests does not measure the indentation hardness of metals and alloys?
- Pick out the correct statement
- Fire refining process is employed in case of
- The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.
- Ferromagnetic materials owe their properties to __________ inner sub-shells.
- Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
- With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
- Desalination of water
- Increase in temperature, in general results in the
- For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
- A dense structure of grinding wheel is not used for the
- Which of the following materials has the least scrap value?
- In condensers used in thermal power plants, steam is normally used in shell side and cooling water on…
- Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the…
- Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e.…
- Working of linear variable differential transducer (LVDT) is based on the principle of variable
- Wrought iron does not have
- Aluminium is extracted from
- Super conduction in metals is observed at a temperature of __________ °K.
- Shaft/rotor speed is most accurately measured by a
- Hydrogen can be
- The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation…
- Between 230 and 370°C, blue brittleness is caused in mild steel because of the
- Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…
- A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C.…
- __________ is not a case hardening process.
- Pick out the wrong statement.
- Increase in the entropy of a system represents the