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  • Question

  • Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.


  • Options
  • A. less
  • B. more
  • C. same
  • D. either (a) or (b); no generalisation can be made

  • Correct Answer
  • more 

    • More questions

    • 1. For the time domain function f(t) = t, the Laplace transform of is given by

    • Options
    • A. 1/2 S3
    • B. 2/S3
    • C. 1/S3
    • D. 2/S2
      • Discuss
    • 2. A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

    • Options
    • A. 45°
    • B. -90°
    • C. -180°
    • D. -45°
      • Discuss
    • 3. A reduction process is accompanied with increase in the

    • Options
    • A. number of electrons
    • B. oxidation number
    • C. both (a) & (b)
    • D. neither (a) nor (b)
      • Discuss
    • 4. Which one is different for the neutral atoms of the isotopes of an element?

    • Options
    • A. Atomic weights
    • B. Atomic numbers
    • C. Number of protons
    • D. Number of electrons
      • Discuss
    • 5. The time required for half of the __________ of a radioactive isotope to decay is called its half life.

    • Options
    • A. nuclei
    • B. electrons
    • C. protons
    • D. neutrons
      • Discuss
    • 6. Column support for the roof of cylindrical storage tank must be provided for

    • Options
    • A. small diameter tanks.
    • B. large diameter tanks.
    • C. small diameter tall tanks.
    • D. all tanks irrespective of their heights and diameters.
      • Discuss
    • 7. For an isothermal variable volume batch reactor, the following relation is applicable for a first order irreversible reaction.

    • Options
    • A. XA = k . t
    • B.
    • C. -ln(1 - XA) = kt
    • D. ?A . ln (1 - XA) = k . t
      • Discuss
    • 8. Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a

    • Options
    • A. furnace employing neutral atmosphere.
    • B. carbon resistance furnace.
    • C. reducing atmosphere.
    • D. furnace employing negative pressure.
      • Discuss
    • 9. Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.

    • Options
    • A. no change
    • B. decrease
    • C. increase
    • D. exponential decrease
      • Discuss
    • 10. Back-trapping in a distillation column results due to

    • Options
    • A. low gas velocity.
    • B. high gas velocity.
    • C. excessive liquid gradient over the tray.
    • D. low reflux ratio.
      • Discuss

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