Hydraulics And Fluid Mechanics In Me - Study Mode
[#311] The discharge through a wholly drowned orifice is given by (where H 1 = Height of water (on the upstream side) above the top of the orifice, H 2 = Height of water (on the downstream side) above the bottom of the orifice and H = Difference between two water levels on either side of the orifice)
Correct Answer
(C) $${ ext{Q}} = {{ ext{C}}_{ ext{d}}} imes { ext{b}}left( {{{ ext{H}}_2} - {{ ext{H}}_1}}
ight)sqrt {2{ ext{gh}}} $$
[#312] The discharge through a small rectangular orifice is given by (where C d = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)
Correct Answer
(A) $${ ext{Q}} = {{ ext{C}}_{ ext{d}}} imes { ext{a}} imes sqrt {2{ ext{gh}}} $$
[#313] One cubic metre of water weighs
Correct Answer
(D) 1000 liters
[#314] According to fan laws, for fans having constant wheel diameter, the pressure varies
Correct Answer
(B) Square of fan speed
[#315] A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?
Correct Answer
(A) Pelton wheel with one nozzle