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Addition of __________ to steel does not impart hardness.

A. Nickel

B. Copper

C. Chromium

D. Silicon

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

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  1. Unbreakable crockeries are made from __________ polymers.
  2. A material in which the atoms are arranged regularly in some directions but not in others, is termed…
  3. Which of the following metals is not subjected to electrolytic refining/purification?
  4. X-rays are
  5. Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional…
  6. Principal alloying element in Elinvar (used for making hair springs for watches) is
  7. Which of the following is not a principal alloying element for the structural steel?
  8. In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean…
  9. Large scale fire on fuel gas line is normally extinguished by
  10. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal &…
  11. The leaching solvent used in Baeyer's process for the purification of bauxite is
  12. What is the pH of distilled water?
  13. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same…
  14. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where,…
  15. Isotropic materials have the same __________ in all directions.
  16. The normal stress is the same in all directions at a point in a fluid, only when the fluid
  17. Ammonia leakage in the refrigeration system is detected by
  18. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
  19. When the wavelength of incident X-rays increases, the angle of diffraction
  20. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous…
  21. Angular displacement can be measured suitably by a
  22. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of…
  23. Dowtherm is a
  24. The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the
  25. 'Ice point' is designated on Fahrenheit temperature scale by
  26. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  27. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed…
  28. The unit of gc is
  29. Working of linear variable differential transducer (LVDT) is based on the principle of variable
  30. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the