Limestone is added in the blast furnace (during pig iron manufacture) to
Form slag by combining with impurities
Supply heat by undergoing exothermic reaction with impurities
Reduce the coke consumption
Reduce slag viscosity
- __________ is used as a material of construction for the blade of power saw.
- Larger length & diameter water pipes are made by
- To improve the machinability of steel, it is generally subjected to
- Leakage in a cooking gas cylinder is detected by
- Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
- A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change.…
- Large scale fire on fuel gas line is normally extinguished by
- __________ number determines whether the fluid flow in an open channel is supercritical, critical or…
- Consideration of the creep is the most important in case of the
- Compressed dry air is used as the cutting fluid, while machining
- M10 index of coke indicates its
- Transformer cores are normally made from
- Tin based white metals are used, where bearings are subjected to
- Property responsible for the talcum powder to cling to the skin is the
- The stress at which extension of the material takes place more rapidly as compared to the increase in…
- The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume :…
- Globular form of cementite is formed during the __________ process.
- Oxygen cylinders used for autogenous (cutting/welding) purposes are
- Alloying elements present in Haynes stellite, which has superior performance than high speed steel,…
- Normalising does not __________ of a metal.
- __________ has the highest melting point out of the following.
- Pick out the wrong statement.
- In a furnace with heating element temperature at 1700°C, the dominant mechanism of heat transfer…
- Wrought iron does not have
- In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________…
- With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________…
- The most important requirement for aluminium industry is the availability of cheap
- Between 230 and 370°C, blue brittleness is caused in mild steel because of the
- The delivery pressure of boiler feed water pump compared to the boiler steam pressure is
- The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the…