Hydrogen in liquid steels is dissolved

A. As tiny gas bubbles

B. In the atomic form

C. In the ionic form

D. In the molecular form

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  1. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________…
  2. High speed steel tools retain their hardness upto a temperature of __________ °C.
  3. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
  4. Pick out the correct combination about the role of various additives used in polymers.
  5. Often earing defects are found during deep drawing operation, because the
  6. Which of the following is not the function of a volute casing provided in a centrifugal pump?
  7. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure…
  8. Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…
  9. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
  10. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation,…
  11. Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
  12. Exposure to __________ accelerates the degradation of plastics.
  13. Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when…
  14. Tempering of a material does not improve its
  15. Pick out the correct statement about the condensation.
  16. __________ of test specimens is not involved in any hardness testing method.
  17. Normalising does not __________ of a metal.
  18. An example of unsteady non uniform flow is the flow of liquid under pressure through a
  19. The highest stress that a material can withstand for a specified length of time without excessive deformation…
  20. In the Bayer's process, bauxite is digested under pressure using
  21. A material being tested for endurance strength is subjected to the __________ load.
  22. Joining of thin foils is preferred to be done by
  23. Euler number is defined as the ratio of inertia force to __________ force.
  24. The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling…
  25. Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
  26. 'Ice point' is designated on Fahrenheit temperature scale by
  27. Which of the following is an example of stress corrosion?
  28. The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D…
  29. Pearlite comprises of
  30. With increase in temperature, the surface tension of water