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  • Question

  • According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)


  • Options
  • A. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end cont Cd(L - nH)2gH
  • B. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end cont Cd(L - 0.1nH)2gH3/2
  • C. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end cont Cd(L - nH)2gH2
  • D. According to Francis formula, the discharge over a rectangular weir is (where n = Number of end cont Cd(L - 0.2nH)2gH5/2

  • Correct Answer
  • Cd(L - 0.1nH)2gH3/2 

    • More questions

    • 1. The heat transfer from a hot body to a cold body is directly proportional to the surface area and difference of temperatures between the two bodies. This statement is called

    • Options
    • A. First law of thermodynamics
    • B. Newton's law of cooling
    • C. Newton's law of heating
    • D. Stefan's law
      • Discuss
    • 2. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

    • Options
    • A. dehumidification
    • B. cooling and humidification
    • C. cooling and dehumidification
    • D. dehumidification and pure sensible cooling
      • Discuss
    • 3. When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to

    • Options
    • A. zero
    • B. one
    • C. ?/2
    • D. ?
      • Discuss
    • 4. In a lithium bromide absorption refrigeration system

    • Options
    • A. lithium bromide is used as a refrigerant and water as an absorbent
    • B. water is used as a refrigerant and lithium bromide as an absorbent
    • C. ammonia is used as a refrigerant and lithium bromide as an absorbent
    • D. none of the above
      • Discuss
    • 5. A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,

    • Options
    • A. the better insulation must be put inside
    • B. the better insulation must be put outside
    • C. one could place either insulation on either side
    • D. one should take into account the steam temperature before deciding as to which insulation is put where
      • Discuss
    • 6. The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called

    • Options
    • A. conduction
    • B. convection
    • C. radiation
      • Discuss
    • 7. The breaking stress is __________ the ultimate stress.

    • Options
    • A. equal to
    • B. less than
    • C. greater than
      • Discuss
    • 8. In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by

    • Options
    • A. liquid pump
    • B. generator
    • C. absorber and generator
    • D. absorber, generator and liquid pump
      • Discuss
    • 9. In reaming process

    • Options
    • A. metal removal rate is high
    • B. high surface finish is obtained
    • C. high form accuracy is obtained
    • D. high dimensional accuracy is obtained
      • Discuss
    • 10. The power per tonne of refrigeration is

    • Options
    • A. 3.5/C.O.P.
    • B. C.O.P/3.5
    • C. 3.5 x C.O.P.
    • D. none of these
      • Discuss

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