Hydraulics And Fluid Mechanics In Me - Study Mode
[#601] The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
Correct Answer
(C) Develops unit power under unit head
[#602] Power required (in watts) to drive a centrifugal pump is (where H m = Manometric head in metres, w = Specific weight in N/m 3 , Q = Discharge of the pump in m 3 /s and $${eta _{ ext{o}}}$$ = Overall efficiency of the pump)
Correct Answer
(B) $$frac{{{ ext{wQ}}{{ ext{H}}_{ ext{m}}}}}{{{eta _{ ext{o}}}}}$$
[#603] According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)
Correct Answer
(B) $$frac{2}{3} imes {{ ext{C}}_{ ext{d}}}left( {{ ext{L}} - 0.1{ ext{nH}}}
ight) imes sqrt {2{ ext{g}}} imes {{ ext{H}}^{frac{3}{2}}}$$
[#604] The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
Correct Answer
(C) Contracts
[#605] The discharge through a large rectangular orifice is given by (where H 1 = Height of the liquid above the top of the orifice, H 2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice and C d = Coefficient of discharge)
Correct Answer
(C) $${ ext{Q}} = frac{2}{3} imes {{ ext{C}}_{ ext{d}}} imes { ext{b}}sqrt {2{ ext{g}}} left( {{ ext{H}}_2^{frac{3}{2}} - { ext{H}}_1^{frac{3}{2}}}
ight)$$