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Lead pencil contains

A. Graphite

B. Lead sulphide

C. Lead

D. Both (B) & (C)

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

You can do it
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  2. __________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it…
  3. Ammonia leakage in the refrigeration system is detected by
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  5. Cold chisel & hammers are made of
  6. A dummy activity is used in PERT network to describe the
  7. Laser welding is widely employed in the __________ industries.
  8. The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer…
  9. The units of the rate constant for a second order reaction are
  10. Which of the following mainly decides the current to be employed is arc welding?
  11. Which of the following does not discharge the dust collected as a dry solid?
  12. The most serious manufacturing defect from fracture toughness point of view is
  13. Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
  14. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
  15. The normal stress is the same in all directions at a point in a fluid, only when the fluid
  16. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
  17. Carbon supply in pack carburising process is in the form of
  18. Age hardening is connected with
  19. A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change.…
  20. Which of the following is a commonly used manometric liquid for low pressure range?
  21. An ideal material for making cooking vessels should have
  22. The main charge in blast furnace is usually
  23. Normalising of an object does not
  24. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 ×…
  25. Wrought iron is not
  26. Spheroidising of a material is a/an __________ process.
  27. The most abundant metal present in the earth's crust is;
  28. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed…
  29. Air-petrol ratio in an automotive petrol engine is around
  30. Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium