Home

Main constituent of bone ash is

A. Ammonium phosphate

B. Calcium phosphate

C. Animal charcoal

D. Ammonium sulphate

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

You can do it
  1. In the blast furnace, incorporation of water vapour in the blast gives the following effect.
  2. The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters…
  3. Normalising of an object does not
  4. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________…
  5. The following thermocouple may be used for measuring temperature upto 1873°K.
  6. A solution which resists change in its pH value on addition of acid/alkali is called the __________…
  7. Powder metallurgy is used to produce
  8. A compact estimate about the amount of materials handling between various work stations is obtained…
  9. Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
  10. With increase in temperature, the surface tension of water
  11. Transformation range for ferrous material is the temperature interval during which __________ is formed…
  12. Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
  13. Heat required to raise the temperature of a body by 1 °C is called its
  14. Neutrons are present in all atoms except that of
  15. A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation…
  16. Pick out the correct statement.
  17. Which of the following is not used as a bearing material?
  18. Normalising does not __________ of a metal.
  19. Surface tension of a liquid
  20. __________ of hard alloy and tool steel is done to make it easily machinable.
  21. Pick out the correct statement.
  22. Silicon percentage in acid resistant cast iron is about
  23. Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
  24. Heat transfer by __________ is almost absent in case of fluidised bed drying operation.
  25. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
  26. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at…
  27. More than 95% of __________ is present in corundum.
  28. The joint for soldering is supported by binding wire made of
  29. The unit of gc is
  30. Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________…