__________ is not used as the control rod material in a nuclear reactor.

A. Cobalt

B. Hafnium

C. Cadmium

D. Boron

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

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  1. The cathode in an electrochemical cell always carries
  2. 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable…
  3. Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
  4. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel &…
  5. Material of construction of the electrode used in the electric resistance welding is
  6. __________ of test specimens is not involved in any hardness testing method.
  7. Which of the following materials has the least scrap value?
  8. Cold chisels hammers are made of
  9. The condition of diffraction from a crystal is given by
  10. The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong
  11. Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
  12. Which of the following is not a dielectric material?
  13. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical…
  14. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________…
  15. A steam pipe is intended to be insulated with two layers of insulating materials of different thermal…
  16. Which of the following metals is not subjected to electrolytic refining/purification?
  17. Which of the following is not a characteristic observed in material failure by fatigue fracture?
  18. Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene…
  19. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  20. The thermodynamic law, = constant, is not followed by the
  21. Increasing sulphur content in pig iron tends to make it
  22. __________ of air does not increase with increase in temperature.
  23. Pick out the wrong statement.
  24. Consumable electrodes are used in the __________ welding.
  25. Which of the following is an ore dressing operation?
  26. Alloy powder manufactured by the following process have spherical shapes.
  27. Gratings is associated with the measurement of
  28. The elastic strain in copper is due to the
  29. __________ are normally subjected to sub-zero treatment.
  30. Pick out the correct statement about the condensation.