The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by





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  3. Ammonia leakage in the refrigeration system is detected by
  4. The underground well of a biogas plant is called the
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  6. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical…
  7. Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when…
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  14. In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which…
  15. A dense structure of grinding wheel is not used for the
  16. In chemical dehumidification of air
  17. __________ is used for tying the steel columns to concrete foundation.
  18. The activity of pure hydrogen gas at 1000°C and 5 atm pressure
  19. Which of the following alloying elements is present in maximum percentage in high speed steel?
  20. The capacity of a spring to store energy is called the spring form co-efficient. Stiffness of a spring…
  21. Lead pencil contains
  22. Ferromagnetic materials owe their properties to __________ inner sub-shells.
  23. Out of the following, the best material capable of withstanding shock & vibration without the danger…
  24. A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is
  25. Main constituent of bone ash is
  26. Brittleness induced due to the presence of sulphur in steel can be reduced by adding
  27. Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional…
  28. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial…
  29. The value of for air & most common gases can be safely assumed to be
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