Home

Which of the following materials does not form adherent oxide film on surface?

A. Copper

B. Nickel

C. Aluminium

D. Gold & silver

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

You can do it
  1. Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
  2. A highly elastic material is deformed least on loading and retains its original form on removal of the…
  3. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
  4. Which of the following is prone to cup and cone fracture?
  5. Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional…
  6. Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.
  7. Faraday's law of electrolysis is related to the
  8. Induced draft fans provided in large thermal power plant boilers have __________ blades.
  9. Multistage compression of air as compared to single stage compression offers the advantage of
  10. Which of the following is not an explosive?
  11. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature…
  12. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________…
  13. Which of the following has the least value of ultimate tensile strength (UTS)?
  14. The best lubricants for a machine working at high temperature & load is
  15. Pick out the correct statement.
  16. Austempering process results in the formation of __________ structure.
  17. Addition of __________ to steel does not impart hardness.
  18. Most of the phosphorous present in the blast furnace burden enters into
  19. The most important function of a washer is to provide bearing area and washers are normally specified…
  20. The hardenability of steel decreases with
  21. Plasma is
  22. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________…
  23. Common salt is produced from sea water in India generally by the __________ method.
  24. Atomic __________ of an element is a whole number.
  25. Tumbling is the process of improving the __________ of the materials/parts.
  26. Closeness of packing is maximum in case of __________ crystal lattice.
  27. Suitability of steel for its use in cable is judged by its strength in
  28. Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
  29. The dew point of moist air becomes __________ with decrease in its relative humidity.
  30. Out of the following, the alloy which has equal percentage of constituents, is