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Corrosion is

A. A physical phenomenon

B. A chemical phenomenon

C. Same as erosion

D. An uncontrollable phenomenon

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

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  1. Stainless steel is welded with difficulty because of
  2. Which of the following contributes maximum as main source of sulphur in the blast furnace charge?
  3. 'Amortization' in respect of financial obligation of a company means the
  4. Spherical shape of mercury droplets is due to its
  5. Water hammer is caused in steam carrying pipelines, because of
  6. Main constituent of bone ash is
  7. Which of the following is an unconventional source of energy?
  8. A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C…
  9. Which of the following material handling equipments is not suitable for moving materials in varying…
  10. For an ideal gas, Cp - Cv is
  11. Materials having __________ lattice structure are usually the most ductile.
  12. More than 95% of __________ is present in corundum.
  13. The majority charge carriers in p-type silicon are
  14. The malleability of a material is the property by virtue of which it can be rolled or hammered into…
  15. In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres…
  16. Oxyacetylene reducing flame is used while carrying out welding on
  17. The swift cup test evaluates the following property of a sheet metal.
  18. Which of the following is not a ferromagnetic material?
  19. Identify the correct statement with reference to the extractive metallurgy of aluminium.
  20. Pick out the wrong statement.
  21. Case hardening of a material is
  22. Good design of the casing of a centrifugal pump aims at minimising the
  23. The most detrimental impurity in high pressure boiler feed water is
  24. For grinding of softer materials, the grinding wheel should have __________ grain size.
  25. Yield strength of a material is determined by the __________ test.
  26. Gratings is associated with the measurement of
  27. A solar cell converts the sunlight directly into __________ energy.
  28. Normalising does not __________ of a metal.
  29. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  30. __________ property of steel increases by addition of large amount of silicon in it.