# 1.A draft tube has an inlet area of 25 m2 and an outlet area of 112.5 m2. The inlet velocity is 8.0.

1.A draft tube has an inlet area of 25 m2 and an outlet area of 112.5 m2. The inlet velocity is 8.0 m/s and the efficiency of the draft tube is 80%. The inlet is 0.9 m above the tailwater level. Calculate the (a) pressure at the inlet of the draft tube, (b) the power lost in the draft tube, and (c) power lost to the tailrace. 2. A Kaplan turbine is (a) a high-head mixed flow turbine (b) a low-head axial-flow turbine (c) an outward-flow reaction turbine (d) in inward-flow impulse turbine 3. Consider the following types of water turbines: 1. Bulb 2. Francis 3. Kaplan 4. Straflow The
1.A draft tube has an inlet area of 25 m2 and an outlet area of 112.5 m2. The inlet velocity is 8.0 m/s and the efficiency of the draft tube is 80%. The inlet is 0.9 m above the tailwater level. Calculate the (a) pressure at the inlet of the draft tube, (b) the power lost in the draft tube, and (c) power lost to the tailrace. 2. A Kaplan turbine is (a) a high-head mixed flow turbine (b) a low-head axial-flow turbine (c) an outward-flow reaction turbine (d) in inward-flow impulse turbine 3. Consider the following types of water turbines: 1. Bulb 2. Francis 3. Kaplan 4. Straflow The correct sequence of order in which the median value of the normal head range is (a) 2 3 1 4 (b) 3 4 1 2 (c) 2 1 4 3 (d) 1 3 2 4

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