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Primary designation of steel is based on its

A. Hardness & tensile strength

B. Carbon content

C. Iron content

D. Alloying elements content

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

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  1. Spark plug is provided in a/an
  2. Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
  3. Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts…
  4. Case hardening of a material is
  5. Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene…
  6. Calorific value of __________ are almost same.
  7. Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
  8. Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C,…
  9. __________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.
  10. Oxyacetylene reducing flame is used while carrying out welding on
  11. Pick out the correct statement
  12. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed…
  13. Hydrogen can be
  14. With increase in temperature, the electrical conductivity of a __________ decreases.
  15. Work done by a/an __________ process is determined by ∫p. dv
  16. Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.
  17. Which of the following is not an ore of copper?
  18. Air-petrol ratio in an automotive petrol engine is around
  19. Material of construction of the electrode used in the electric resistance welding is
  20. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of…
  21. M10 index of coke indicates its
  22. __________ iron is produced by the annealing of white cast iron.
  23. Electrometallurgy is not involved in the extraction of __________ from its ore.
  24. Hardening of steel is not possible, unless it is heated __________ critical point.
  25. Case hardening is not done by
  26. Annealing of cast iron
  27. Which of the following equipments is used for liquid dispersion?
  28. Holes for riveting purposes should be preferably made by
  29. Pick out the correct statement.
  30. Which of the following is not a dielectric material?