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  • Question

  • Neon gas is


  • Options
  • A. flammable in nature.
  • B. used in color discharge tube.
  • C. filled in lamps having tungsten filament.
  • D. all (a), (b) and (c).

  • Correct Answer
  • used in color discharge tube. 

    • More questions

    • 1. The closed loop pole of a stable second order system could be

    • Options
    • A. both real and positive.
    • B. complex conjugate with positive real parts.
    • C. both real and negative.
    • D. one real positive and the other real negative.
      • Discuss
    • 2. High alumina refractories are used in the

    • Options
    • A. dome of blast furnace stoves.
    • B. electric arc furnace roof.
    • C. glass melting furnaces.
    • D. all (a), (b) and (c).
      • Discuss
    • 3. Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature.

    • Options
    • A. more than
    • B. less than
    • C. same as
    • D. either more or less; depends on the room temperature
      • Discuss
    • 4. Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

    • Options
    • A. preheating
    • B. cooling
    • C. burning
    • D. all
      • Discuss
    • 5. Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.

    • Options
    • A. filtering
    • B. washing
    • C. drying
    • D. all (a), (b) & (c)
      • Discuss
    • 6. Pressure drop due to pipe fittings can be estimated by the equation,
      , where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (dimensionless) for 45° elbow and 180° close return bends would be respectively around

    • Options
    • A. 5 and 10
    • B. 45 and 75
    • C. 180 and 300
    • D. 300 and 500
      • Discuss
    • 7. Relative humidity is the ratio of the

    • Options
    • A. partial pressure of the vapour to the vapour pressure of the liquid at room temperature.
    • B. partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.
    • C. actual humidity to saturation humidity.
    • D. none of these
      • Discuss
    • 8. Pick out the wrong statement.

    • Options
    • A. Catalytic converter is fitted in automobiles to reduce carbon monoxide concentration in exhaust emissions.
    • B. Inhalation of pollutant carbon monoxide results in death by asphyxiation.
    • C. Sulphur dioxide is the main pollutant emitted from the exhaust of petrol driven automobiles.
    • D. Decomposition of plants containing chlorophyll is a natural source of carbon monoxide in atmosphere.
      • Discuss
    • 9. A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is

    • Options
    • A. 0.16
    • B. 0.33
    • C. 0.66
    • D. 0.47
      • Discuss
    • 10. In a shell and tube heat exchanger, tube side __________ of the mass velocity.

    • Options
    • A. heat transfer co-efficient is proportional to 0.8th power
    • B. pressure drop is proportional to the square
    • C. both 'a' & 'b'
    • D. neither 'a' nor 'b'
      • Discuss

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