Biological shield in a nuclear reactor is generally provided to protect against the

A. α-rays

B. β-rays

C. Gamma rays & neutrons

D. Electrons

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  1. Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.
  2. Pick out the wrong statement.
  3. Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative…
  4. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional…
  5. A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal…
  6. Pick out the correct statement about the condensation.
  7. Powder metallurgy process does not make metal powder by
  8. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  9. Ceramic compounds as compared to metallic compounds
  10. Upto the critical radius of insulation, added insulation, will
  11. The leaching solvent used in Baeyer's process for the purification of bauxite is
  12. The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________…
  13. Which of the following is not a ferromagnetic material?
  14. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying…
  15. Increase in temperature, in general results in the
  16. For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship…
  17. The stress at which extension of the material takes place more rapidly as compared to the increase in…
  18. The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters…
  19. Triple point of water is
  20. Consideration of the creep is the most important in case of the
  21. Spherical shape of mercury droplets is due to its
  22. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the…
  23. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
  24. In the blast furnace, incorporation of water vapour in the blast gives the following effect.
  25. Material of construction of the electrode used in the electric resistance welding is
  26. Surface tension of a liquid
  27. Addition of silicon to cast iron
  28. Annealing of cast iron
  29. Out of the following, the best material capable of withstanding shock & vibration without the danger…
  30. Corrosion of metals cannot be prevented by its