Cast iron contains __________ percent carbon.

A. 2.5

B. 3.75

C. 4.75

D. 5.25

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  1. The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.
  2. Iron content in Indian iron ore is about __________ percent.
  3. Tempering of a material does not improve its
  4. The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________…
  5. Silicon crystal can be converted to p-type semiconductor by doping with
  6. Gross national product (GNP) means the total value of __________ in a country.
  7. Fatigue limit improvement by over stressing the metal by successively increasing the load is called…
  8. Which of the following equipments is used for liquid dispersion?
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  11. Increasing the carbon content of steel
  12. The substance used as a smoke screen in warfare is
  13. The product (s) of roasting of a sulphide ore is (are)
  14. Plastics as a material of construction suffer from the drawback of low
  15. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  16. Tumbling is the process of improving the __________ of the materials/parts.
  17. Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be…
  18. Annealing of cast iron
  19. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________…
  20. Titanium is produced by __________ of Ti Cl4.
  21. Maximum permissible air velocity in pipelines is about __________ metre/second.
  22. Maximum consumption of limestone is in the __________ industry.
  23. Pick out the wrong statement.
  24. Increase in temperature, in general results in the
  25. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
  26. Non-ferrous alloys used for making cutting tools need not have high
  27. Out of the following the refractive index is the highest for
  28. A reduction in thermal resistance during heat transfer does not occur in the
  29. In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 =…
  30. Which of the following is the correct nature of shear stress distribution along the cross section in…