The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
Cyaniding
Sherardizing
Spheroidising
None of these
- The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
- Machinability of hard alloys and tool steels is improved by
- The most detrimental impurity in high pressure boiler feed water is
- Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
- Silicon in steel
- Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial…
- Which of the following is not a ferromagnetic material?
- In extrusion of metals, which of the following statement is true?
- The difference between gross & net calorific values of fuel is due to the
- Ultimate strength in tension as compared to that in shear for steel is
- Superheating of steam is done at constant
- The order of a chemical reaction
- L.D. (Linz-Donawitz) converter is used in the production of
- __________ has a negative co-efficient of linear expansion.
- __________ the exhaust gas is an indication of the incomplete combustion of fuel.
- Oxyacetylene reducing flame is used while carrying out welding on
- Rain drops falling through atmospheric air attain limited terminal velocity, because of
- Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles…
- An ideal material for making cooking vessels should have
- The most important consideration in value engineering is the
- The mechanism which changes the value of manipulated variable in response to the output signal from…
- The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost…
- Electrometallurgical methods of metal extraction is normally used for those metals
- The swift cup test evaluates the following property of a sheet metal.
- Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
- Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other…
- 'Cryogenics' is concerned with the generation & use of low temperature in the range of
- Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation…
- __________ is the process used for setting up compressive stresses in the surface of a metal to improve…
- Which of the following hardness tests does not measure the indentation hardness of metals and alloys?