The excess air required for the combustion of pulverised coal is of the order of about __________ percent.

A. 5

B. 15

C. 30

D. 45

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

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  1. Pressure required to increase the density of water by about 1% is __________ atmosphere.
  2. The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and…
  3. Dies for wire drawing are generally made of
  4. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which __________ with increase in the…
  5. Maximum permissible sulphur content in steel is __________ percent.
  6. Laser is a device to produce
  7. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a…
  8. The main charge in blast furnace is usually
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  10. Pick out the wrong statement.
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  12. __________ of grey cast iron produces white cast iron.
  13. Case hardening is not done by
  14. Pick out the wrong statement.
  15. Lead pencil contains
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  17. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
  18. Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.
  19. __________ furnace is generally used in the non-ferrous foundries.
  20. Isotropic materials have the same __________ in all directions.
  21. Breakeven point represents the condition, when the company runs under no profit no loss condition. In…
  22. Steel & cast iron pipes are produced by __________ casting.
  23. Which of the following mainly decides the current to be employed is arc welding?
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  26. LVDT used for displacement measurement is a/an __________ transducer.
  27. Consumable electrodes are used in the __________ welding.
  28. Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air…
  29. In chemical dehumidification of air
  30. In electrical resistance welding, distortion results from the use of improper