# 1.Which of the following is the correct statement? The specific speed of a hydroturbine (a) refers..

1.Which of the following is the correct statement? The specific speed of a hydroturbine (a) refers to the speed of a turbine of unit dimensions (b) is a type-number representative of its performance (c) is specific to the particular turbine (d) depends only upon the head under which the turbine operates 2. Which of the following statements are correct with respect to hydraulic turbines? 1. Speed is inversely proportional to diameter of the turbine 2. Power is proportional to speed 3. Power is proportional to (3/2) power of head 4. Speed is proportional to square root of head The
1.Which of the following is the correct statement? The specific speed of a hydroturbine (a) refers to the speed of a turbine of unit dimensions (b) is a type-number representative of its performance (c) is specific to the particular turbine (d) depends only upon the head under which the turbine operates 2. Which of the following statements are correct with respect to hydraulic turbines? 1. Speed is inversely proportional to diameter of the turbine 2. Power is proportional to speed 3. Power is proportional to (3/2) power of head 4. Speed is proportional to square root of head The correct answer is (a) 2, 3 and 4 (b) 1, 2 and 3 (c) 3 and 4 only (d) 2 and 4 only 3. A turbine works at 20 m head and 500 rpm speed. Its 1: 2 scale model that is to be tested at a head of 20 m should have a rotational speed of nearly (a) 1000 rpm (b) 700 rpm (c) 500 rpm (d) 250 rpm 4. Tests on a turbine showed that a discharge of 12 m3/s was being used under a head of 64 m. The unit discharge in this case is (a) 0.1875 (b) 1.5 (c) 5.33 (d) 18.47

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