Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

A. Tempering

B. Hardening

C. Annealing

D. Normalising

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
  2. Hydrogen in liquid steels is dissolved
  3. The materials which fracture even at small strains are termed as brittle, while those materials which…
  4. Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene…
  5. Boiler tube size is specified by its thickness and __________ diameter.
  6. The most important consideration in value engineering is the
  7. Which of the following has the least value of ultimate tensile strength (UTS)?
  8. Thermal efficiency of an internal combustion engine is around __________ percent.
  9. Wrought iron is never shaped by
  10. Dryness fraction of dry steam is
  11. With increase in temperature, the surface tension of water
  12. On being hit with a hammer, __________ will readily fracture.
  13. Materials having __________ lattice structure are usually the most ductile.
  14. Reduction in the grain size reduces the __________ of the material.
  15. Boiling point of water gets lowered at high altitudes (e.g., hills), because
  16. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic…
  17. Galvanic corrosion cannot be prevented by
  18. Ammonia leakage in the refrigeration system is detected by
  19. The malleability of a material is the property by virtue of which it can be rolled or hammered into…
  20. Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
  21. Which of the following materials has the maximum shrinkage allowance?
  22. All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in…
  23. Triple point of water is
  24. The mechanism involved in the removal of metal in drilling operation is by
  25. The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic…
  26. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
  27. One ton of refrigeration is not equivalent to the heat removal rate of
  28. According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear…
  29. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
  30. Rankine cycle comprises of two isothermal and two __________ processes.