Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.

A. X-rays

B. γ-rays

C. α-rays

D. β-rays

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

You can do it
  1. Yield strength of a material is determined by the __________ test.
  2. The majority charge carriers in p-type silicon are
  3. An alloy of Fe - 0.4 % C is
  4. Biological shield in a nuclear reactor is generally provided to protect against the
  5. Runge-Kutta method is used to solve a/an
  6. Which one can be directly solidified from gaseous state without entering into liquid state?
  7. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used.…
  8. Removal of non-condensable from steam or other vapour is termed as the __________ process.
  9. The phenomenon occurring during explosion of a hydrogen bomb is
  10. __________ furnace is generally used in the non-ferrous foundries.
  11. Which of the following is not an ore of copper?
  12. Compressed dry air is used as the cutting fluid, while machining
  13. Superheating of steam is done at constant
  14. __________ property of a material is determined by the Herbert Pendulum device.
  15. 'Flare tower' used in industry is meant for
  16. Cupola produces __________ iron.
  17. __________ wire is never used for making the heating element.
  18. Earing is a defect found in steels after the following metal working operation.
  19. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
  20. Which of the following materials does not form adherent oxide film on surface?
  21. Alloy powder manufactured by the following process have spherical shapes.
  22. Basic open hearth furnace (BOF) is not used for producing __________ steel.
  23. The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of…
  24. 'Dikes' are low height walls made around the storage vessels meant for storing hazardous & inflammable…
  25. The normal stress is the same in all directions at a point in a fluid, only when the fluid
  26. Joule-Thomson co-efficient is the ratio of
  27. Even though heat transfer co-efficient in boiling liquids is large, use of fins is advantageous, when…
  28. Principal alloying element in Elinvar (used for making hair springs for watches) is
  29. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical…
  30. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.