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  • Question

  • Heat transfer co-efficient, hG(Kcal/hr.m2 .°C) and mass velocity of air, G (kg/hr.m2 ) for air flow parallel to the surface in case of constant drying rate in batch drying is related as hG = 0.0176G0.8. But when the flow of air perpendicular to the surface is encountered, this equation changes to


  • Options
  • A. hG = 1.004G0.37
  • B. 1.004G0.8
  • C. hG = 0.0176G0.37
  • D. 0.0176G1.37

  • Correct Answer
  • hG = 1.004G0.37 

    • More questions

    • 1. A standard test for determination of hardness in water is termed as __________ test.

    • Options
    • A. EDTA
    • B. electometric
    • C. total count
    • D. presumptive
      • Discuss
    • 2. Starting material for the production of butadiene in India is

    • Options
    • A. naphthalene
    • B. benzol
    • C. ethyl alcohol
    • D. phthalic anhydride
      • Discuss
    • 3. Atomic __________ of an element is a whole number.

    • Options
    • A. weight
    • B. number
    • C. volume
    • D. radius
      • Discuss
    • 4. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

    • Options
    • A. use coal for heating purpose.
    • B. gasify coal to get hydrogen from coal gas.
    • C. use coal as filler in fertiliser.
    • D. use coal as conditioner in fertiliser.
      • Discuss
    • 5. Calcium ammonium nitrate (CAN) is

    • Options
    • A. a mixed fertiliser
    • B. a straight fertiliser
    • C. a complex fertiliser
    • D. not a fertiliser ; it is an explosive
      • Discuss
    • 6. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is

    • Options
    • A. independent of the temperature.
    • B. increased with the increase in pressure.
    • C. decreased with the increase in pressure.
    • D. unchanged by the pressure change.
    • E. none of these
      • Discuss
    • 7. __________ liquor is best handled in a long tube vertical evaporator.

    • Options
    • A. Foamy
    • B. Scaling
    • C. Viscous
    • D. Salting
      • Discuss
    • 8. Pressure of 0.01 psi (absolute) can be measured by __________ gauge.

    • Options
    • A. ionisation
    • B. Pirani
    • C. Mcloid
    • D. none of these
      • Discuss
    • 9. Addition of filter aid to the slurry before filtration is done to ...... of the cake.

    • Options
    • A. increase the porosity
    • B. increase the compressibility co-efficient
    • C. decrease the porosity
    • D. decrease the compressibility co-efficient
      • Discuss
    • 10. The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).

    • Options
    • A. 20
    • B. 230
    • C. 750
    • D. 1500
      • Discuss

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