Home

The product (s) of roasting of a sulphide ore is (are)

A. Oxide only

B. Sulphate only

C. Oxide and sulphate

D. Dependent on temperature and partial pressure of oxygen & sulphur dioxide

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

You can do it
  1. Annealing of cast iron
  2. One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C).…
  3. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement.…
  4. __________ of grey cast iron produces white cast iron.
  5. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation…
  6. Which of the following are considered applications of ultrasonic testing?
  7. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal &…
  8. Dephosphorization of molten pig iron is favoured by
  9. Which of the following is prone to cup and cone fracture?
  10. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
  11. The delivery pressure of boiler feed water pump compared to the boiler steam pressure is
  12. Presence of nickel & chromium in steel does not raise its
  13. High speed steel tools retain their hardness upto a temperature of __________ °C.
  14. Notched bar test is used for testing the __________ of a material.
  15. The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.
  16. Which of the following is the largest quantum of pressure?
  17. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
  18. Which of the following is an example of cathodic protection of metals against corrosion?
  19. The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.
  20. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________…
  21. In the blast furnace, incorporation of water vapour in the blast gives the following effect.
  22. Recrystallisation temperature of steel is __________ °C.
  23. At 100% relative humidity, the dew point temperature of moist air is
  24. Which of the following materials has the least scrap value?
  25. Consideration of the creep is the most important in case of the
  26. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
  27. Spheroidising of a material is a/an __________ process.
  28. Tumbling is the process of improving the __________ of the materials/parts.
  29. The value of for air & most common gases can be safely assumed to be
  30. Potable water means the water used for