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  • Question

  • The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.


  • Options
  • A. 5 to 10
  • B. 15 to 30
  • C. 40 to 50
  • D. 55 to 75

  • Correct Answer
  • 15 to 30 

    • More questions

    • 1. Which of the following fractions of petroleum contains maximum sulphur?

    • Options
    • A. Diesel
    • B. Gasoline
    • C. Naphtha
    • D. Atmospheric residue
      • Discuss
    • 2. Rate of heat release in a furnace, which is the measure of heat intensity is defined as

    • Options
    • A. kcal/hr/m3 combustion space.
    • B. kcal/m3 combustion space.
    • C. kcal/hr.
    • D. none of these.
      • Discuss
    • 3. Paper pulp produced by kraft/sulphate process is

    • Options
    • A. bleached easily
    • B. dull white in color
    • C. strong fibrous
    • D. dark colored
      • Discuss
    • 4. 1 torr is equivalent to

    • Options
    • A. 1 mm Hg
    • B. 1 Pascal
    • C. 1 ata
    • D. 1 mm wc
      • Discuss
    • 5. An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the

    • Options
    • A. Kistyakowsky equation
    • B. Antonic equation
    • C. Kopp's rule
    • D. Trouton's rule
      • Discuss
    • 6. In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the

    • Options
    • A. square root of the velocity.
    • B. square of the viscosity.
    • C. filtration time only.
    • D. washing time only.
      • Discuss
    • 7. Panel test determines the __________ of refractories.

    • Options
    • A. fusion point
    • B. spalling resistance
    • C. slag penetration resistance
    • D. refractoriness under load (RUL)
      • Discuss
    • 8. Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in

    • Options
    • A. food industry.
    • B. municipal sewage treatment.
    • C. petroleum refinery.
    • D. iron & steel plant.
      • Discuss
    • 9. The density of a gas at N.T.P.is '?'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become at a temperature of __________ °K

    • Options
    • A. 273°
    • B. 300°
    • C. 400°
    • D. 300°
      • Discuss
    • 10. Pick out the wrong unit conversion of mass transfer co-efficient.

    • Options
    • A. 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar
    • B. 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar
    • C. 1 lb/hr . ft2 = 4.8823 kg/hr . m2
    • D. 1 kg/hr . m2 = 4.8823 lb/hr . ft2
      • Discuss

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