__________ 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. Induced draft fans provided in large thermal power plant boilers have __________ blades.
  2. The units of the rate constant for a second order reaction are
  3. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb…
  4. In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then…
  5. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
  6. Joining of thin foils is preferred to be done by
  7. Stresses encountered in the metal forming processes are less than the __________ of the material.
  8. Pick out the wrong statement
  9. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction…
  10. Addition of __________ to steel does not help in improving its machinability.
  11. Which one can be directly solidified from gaseous state without entering into liquid state?
  12. During sensible cooling of air, its wet bulb temperature
  13. An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform…
  14. With increase in temperature, the electrical conductivity of a __________ decreases.
  15. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
  16. __________ is used for tying the steel columns to concrete foundation.
  17. Heat transfer by __________ is almost absent in case of fluidised bed drying operation.
  18. Eutectoid composition of carbon steel at room temperature is
  19. The dimensional formula of bulk modulus of elasticity is same as that of the
  20. Which of the following is an unconventional source of energy?
  21. Lead is added to 60:40 brass primarily to improve
  22. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
  23. Maximum permissible sulphur content in steel is __________ percent.
  24. Preheating before welding is done to
  25. __________ of air does not increase with increase in temperature.
  26. Dephosphorization of molten pig iron is favoured by
  27. Tip of the match stick contains a mixture of
  28. Copper deposits are found in India at the following location:
  29. What is the value of included angle of a triangular notch for maximum discharge?
  30. Blow off cock is provided in steam boiler to