Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is





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  1. Maximum hardenability of steel depends upon its
  2. Friction factor for fluid flow in pipe does not depend upon the
  3. Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________…
  4. The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
  5. Iron content in Indian iron ore is about __________ percent.
  6. __________ is the hardest material out of the following.
  7. Which of the following is an ore dressing operation?
  8. Dielectric
  9. Which of the following materials has the poorest electrical conductivity?
  10. __________ property of steel increases by addition of large amount of silicon in it.
  11. Pick out the wrong conversion of absolute & kinematic viscosities.
  12. Super conduction in metals is observed at a temperature of __________ °K.
  13. Maximum permissible air velocity in pipelines is about __________ metre/second.
  14. Young's modulus of a material is the measure of its
  15. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation,…
  16. Annealing of white cast iron produces __________ iron.
  17. The majority charge carriers in p-type silicon are
  18. Corona discharge is related to the operation of a/an
  19. High endurance limit of carburised machine parts is because of the fact that carburisation
  20. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a…
  21. The most economical channel section for the fluid flow is the one for which the discharge is maximum…
  22. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and…
  23. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction…
  24. Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble…
  25. An atom bomb works on the principle of
  26. Fibrous fracture is normally encountered in the __________ materials.
  27. The specific gravity of coal depends mainly on its __________ content.
  28. Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion…
  29. Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling…
  30. For dynamic strain measurement, the Wheatstone bridge used is of __________ type.