__________ is the hardest material out of the following.

A. Boron carbide

B. Tungsten carbide

C. Hardened steel

D. Silicon carbide

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

You can do it
  1. Yield strength of a material is determined by the __________ test.
  2. Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying…
  3. The leaching solvent used in Baeyer's process for the purification of bauxite is
  4. Diffusion co-efficient of a metal in a solid solution depends upon its
  5. Cold chisels hammers are made of
  6. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
  7. The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer…
  8. Heating of ferromagnetic materials to a temperature above Curie temperature makes it
  9. Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
  10. __________ joint is mostly used for joining pipes carrying water at low pressure.
  11. Rankine cycle comprises of two isothermal and two __________ processes.
  12. The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic…
  13. __________ rubber is generally used for making 'O' rings used for vacuum sealings.
  14. The substance used as a smoke screen in warfare is
  15. The product of a commercial direct reduction process is
  16. Electrometallurgy is not involved in the extraction of __________ from its ore.
  17. __________ property of steel increases by addition of large amount of silicon in it.
  18. The elastic strain in copper is due to the
  19. On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate…
  20. Which of the following is the largest quantum of pressure?
  21. High endurance limit of carburised machine parts is because of the fact that carburisation
  22. Pick out the correct combination about the role of various additives used in polymers.
  23. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing…
  24. Absolute zero pressure can be attained at a temperature of
  25. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed…
  26. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement.…
  27. Steel containing low percentage of nickel, chromium & tungsten are termed as the __________ steel.
  28. Pick out the wrong statement about coating/electroplating of metals.
  29. Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.
  30. All of the following alloying elements of steel increases hardness but sacrifice ductility, except