Silicon percentage in acid resistant cast iron is about

A. 4

B. 8

C. 14

D. 20

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  1. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.
  2. Nickel and __________ are the alloying element added in steel to increase its toughness.
  3. __________ is used as a material of construction for the blade of power saw.
  4. Increase in the entropy of a system represents the
  5. Fog is an example of colloidal system of
  6. The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
  7. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
  8. Pick out the wrong statement about nucleate boiling.
  9. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
  10. Ferromagnetic materials owe their properties to __________ inner sub-shells.
  11. Spheroidising of a material is a/an __________ process.
  12. Energy of the sun arises mainly from __________ reactions.
  13. A psychrometer does not measure the __________ temperature of moist air.
  14. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
  15. Most important property of steels for use in automobile bodies is the
  16. What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer…
  17. The majority charge carriers in p-type silicon are
  18. Lead is poured into the joint between two- __________ pipes.
  19. When the wavelength of incident X-rays increases, the angle of diffraction
  20. The process of removal of scale formed during hot rolling of steel is termed as
  21. The rolling process cannot be used to produce
  22. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
  23. Hydrogen in liquid steels is dissolved
  24. Laser is a device to produce
  25. Highest cutting speed is achieved by the __________ tool material.
  26. Basic open hearth furnace (BOF) is not used for producing __________ steel.
  27. __________ wire is never used for making the heating element.
  28. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure…
  29. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well.…
  30. An oxidation process is accompanied with decrease in the