Civil Engineering Mcqs


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  • A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?
  • In power law, δ = [A (du/dy)2 + B] then the fluid is__________________?
  • Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke’s law range is_________________?
  • Terminal velocity is_____________________?
  • In case of a centrifugal pump, the theoretical head developed is dependent on the _____________ the impeller?

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