The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
5
15
30
45
- __________ is the process used for setting up compressive stresses in the surface of a metal to improve…
- __________ the exhaust gas is an indication of the incomplete combustion of fuel.
- A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
- Pick out the wrong statement.
- A psychrometer does not measure the __________ temperature of moist air.
- Basic open hearth furnace (BOF) is not used for producing __________ steel.
- Encyclopaedia of Chemical Technology has been
- Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare…
- Ferromagnetic materials owe their properties to __________ inner sub-shells.
- Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic…
- In the acid Bessemer process, the hot metal should have the following composition.
- Addition of __________ to steel does not help in improving its machinability.
- The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of…
- A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change.…
- Silicon in steel
- The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation…
- The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction…
- Larger length & diameter water pipes are made by
- Increasing sulphur content in pig iron tends to make it
- The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
- The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________…
- All of the following alloying elements of steel increases hardness but sacrifice ductility, except
- Pick out the wrong statement about the machinability of metals. Machinability of a metal
- __________ is used as a material of construction for the blade of power saw.
- Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
- Normalising does not __________ of a metal.
- If Reynolds number is greater than 1, then the
- Which of the following is not a ferromagnetic material?
- Surface tension of a liquid
- Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…