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  1. The activity co-efficient of the solute in a dilute solution
  2. Tempering of a material does not improve its
  3. Oxyacetylene reducing flame is used while carrying out welding on
  4. At absolute zero temperature, for any reaction involving condensed phases
  5. Lead is poured into the joints between two __________ pipes.
  6. The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
  7. Which of the following fastening devices has its both ends threaded?
  8. The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation…
  9. Chromium molybdenum steel cannot be welded using __________ welding.
  10. Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
  11. Glycerine is used as a coolant in cooling of some engines instead of water, because
  12. Cold heading or upsetting is categorised as the __________ process.
  13. __________ can replace tungsten in high speed steel.
  14. Electrochemical corrosion can occur, only if __________ is present in contact with metal.
  15. __________ temperature remains constant during adiabatic saturation process of unsaturated air.
  16. Chlorine acts as a bleaching agent only in the presence of
  17. The hardenability of steel decreases with
  18. Air intake for an air compressor should be preferably taken from
  19. Biological shield in a nuclear reactor is generally provided to protect against the
  20. The main constituent of bones is
  21. Which of the following is not used as a bearing material?
  22. Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
  23. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing…
  24. 'Flare tower' used in industry is meant for
  25. Which one of the following is incombustible?
  26. Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.
  27. Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
  28. Recrystallisation temperature of steel is __________ °C.
  29. A spring material should have low
  30. A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C.…