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Galvanic corrosion cannot be prevented by

A. Cathodic protection

B. Anodic protection

C. Usage of largest possible anodic area

D. Any one of these

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

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  1. Which of the following is not a principal alloying element for the structural steel?
  2. Secondary hardening in steels arises out of the
  3. Dephosphorization of molten pig iron is favoured by
  4. A high pressure boiler generates steam at a pressure greater than __________ kg/cm2.
  5. For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation…
  6. Notched bar test is used for testing the __________ of a material.
  7. A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C…
  8. Material of construction of the electrode used in the electric resistance welding is
  9. Addition of __________ to steel does not help in improving its machinability.
  10. Transformation range for ferrous material is the temperature interval during which __________ is formed…
  11. More than 95% of __________ is present in corundum.
  12. Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C…
  13. A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change.…
  14. Steel & cast iron pipes are produced by __________ casting.
  15. Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution
  16. Pick out the wrong statement.
  17. Working of linear variable differential transducer (LVDT) is based on the principle of variable
  18. __________ pipe is the most suitable for carrying sanitary drainage.
  19. The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.
  20. In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length,…
  21. Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded…
  22. Blast furnace slag is mainly molten
  23. Fatigue limit improvement by over stressing the metal by successively increasing the load is called…
  24. Which one can be directly solidified from gaseous state without entering into liquid state?
  25. Pick out the wrong statement.
  26. Fire refining process is employed in case of
  27. High speed steel tools retain their hardness upto a temperature of __________ °C.
  28. Softening of hardened steel is done by its
  29. Load cells used for the measurement of weight has
  30. With increase in temperature, the electrical conductivity of a __________ decreases.