Home

Principal alloying element in Elinvar (used for making hair springs for watches) is

A. Copper

B. Aluminium

C. Nickel

D. Zinc

Related Questions

  1. The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the…
  2. In case of compression of one kg of air, the work done will be the least, when the value of polytropic…
  3. A material being tested for endurance strength is subjected to the __________ load.
  4. Factor of safety is the ratio of the __________ stress to the working stress.
  5. Powder metallurgy technique is used in the production of __________ tools.
  6. Air standard Otto cycle is more efficient than the diesel cycle for the same
  7. Lead is poured into the joint between two __________ pipes.
  8. What is the pH of distilled water?
  9. Steels with high carbon equivalent have poor Weldability, because in these steels during welding
  10. Dies for wire drawing are generally made of
  11. For grinding of softer materials, the grinding wheel should have __________ grain size.
  12. Biological shield in a nuclear reactor is generally provided to protect against the
  13. Enzymes belong to the category of
  14. Which of the following metals cannot be hot worked at room temperature?
  15. Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam…
  16. Quartz is a __________ material.
  17. If Reynolds number is greater than 1, then the
  18. __________ has a negative co-efficient of linear expansion.
  19. Holes for riveting purposes should be preferably made by
  20. Tumbling is the process of improving the __________ of the materials/parts.
  21. __________ is not used as the control rod material in a nuclear reactor.
  22. Desalination of water
  23. The order of a chemical reaction
  24. The materials which fracture even at small strains are termed as brittle, while those materials which…
  25. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
  26. Ceramic compounds as compared to metallic compounds
  27. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying…
  28. A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle…
  29. One ton of refrigeration is not equivalent to the heat removal rate of
  30. The elastic strain in copper is due to the

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