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Which of the following statement(s) is/are incorrect? (i) A turbine is called an impulse turbine if at the inlet of the turbine total energy is only kinetic energy (ii) A turbine is called a reaction turbine if at the inlet of the turbine the total energy is kinetic energy and pressure energy (iii) The inward flow reaction turbine having radial discharge at the outlet is known as Kaplan turbine
Consider the following statements: 1. In an Impulse turbine, the pressure of the flowing water remains un- changed and is equal to atmospheric Pressure. 2. In Impulse turbines, the water impinges on the buckets with ‘Pressure energy’. 3. In a Reaction turbine, the pressure of the flowing water remains un- changed and is equal to atmospheric pressure. Which of the above statements is/are correct?
The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.
Consider the following statements in connection with hydraulic turbines: 1. The Kaplan turbine is a radial flow turbine in which the guide vane angles as well as the runner vane angles are adjustable. 2. Francis and Kaplan turbines are provided with draft tubes which carry water from exit of runner to tail water to increase the gross head across the turbine. 3. The parts of turbines susceptible to cavitation are the guide vanes and runner vanes – drastically reducing the turbine efficiency. 4. The specific speed of a 4-jet Pelton turbine will be 28 if the specific speed of a single-jet Pelton turbine is 14. Which of the above statements are correct?
Which of the following statements are correct? 1) Velocity compounded impulse turbine gives less speed and less efficiency. 2) For an ideal centrifugal compressor, the pressure produced depends on impeller velocity and diameter. 3) While flowing through the rotor blades in a gas turbine, the relative velocity of gas continuously decreases. 4) While flowing through the rotor blades in an axial flow compressor, the relative velocity of air continuously decreases.
Fill the half-filled code snippet to get the following graph: impulse(1,, ‘red’); ____; impulse(1,, ‘blue’); impulse(1,, ‘yellow’); impulse(1,, ‘green’);
Choose the correct option after observing the given graph and the code snippet carefully. impulse(1,, ‘red’); hold on; impulse(1,, ‘blue’); impulse(1,, ‘yellow’); impulse(1,, ‘green’);
The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would
Consider the following statements regarding a turbine: 1. Specific speed plays an important role in the selection of the type of turbine. 2. An increase in specific speed of the turbine is accompanied by higher maximum efficiency. 3. The runner of too high specific speed with high available head increases the cost of the turbine on account of the high mechanical strength required. Which of the above statements are correct?