Mechanical Engineering Exam > Mechanical Engineering Questions > Consider the following statements:1. Pelton w...
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Consider the following statements:
1. Pelton wheel is a tangential flow impulse turbine
2. Francis turbine is an axial flow reaction turbine
3. Kaplan turbine is a radial flow reaction turbine
Which of the above statements is/ are correct?
1. Pelton wheel is a tangential flow impulse turbine
2. Francis turbine is an axial flow reaction turbine
3. Kaplan turbine is a radial flow reaction turbine
Which of the above statements is/ are correct?
- a)1 and 3
- b)1 alone
- c)2 alone
- d)3 alone
Correct answer is option 'B'. Can you explain this answer?
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Consider the following statements:1. Pelton wheel is a tangential flow...
Ans. (b)
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Consider the following statements:1. Pelton wheel is a tangential flow...
Pelton Wheel:
- The Pelton wheel is a type of impulse turbine that converts the kinetic energy of a jet of water into mechanical energy.
- It is named after its inventor, Lester Allan Pelton.
- The Pelton wheel is a tangential flow turbine, which means that the water jet strikes the turbine buckets tangentially.
- The water jet is directed onto the buckets by a nozzle, and as the water strikes the buckets, it imparts a tangential force.
- The tangential force causes the wheel to rotate, and the mechanical energy is then extracted from the rotating wheel.
Francis Turbine:
- The Francis turbine is a type of reaction turbine that converts the potential energy of water into mechanical energy.
- It is named after its inventor, James B. Francis.
- The Francis turbine is an axial flow turbine, which means that the water flows parallel to the axis of rotation of the turbine.
- The water enters the turbine through a spiral casing and flows over the blades of the rotor.
- As the water flows over the blades, it exerts a force on them, causing the rotor to rotate.
- The mechanical energy is then extracted from the rotating rotor.
Kaplan Turbine:
- The Kaplan turbine is another type of reaction turbine that is commonly used for low-head applications.
- It is named after its inventor, Viktor Kaplan.
- The Kaplan turbine is a radial flow turbine, which means that the water flows radially outward from the center of the turbine.
- The water enters the turbine through a spiral casing and flows over the blades of the rotor.
- As the water flows over the blades, it exerts a force on them, causing the rotor to rotate.
- The mechanical energy is then extracted from the rotating rotor.
Correct Statements:
- Statement 1 is correct because the Pelton wheel is indeed a tangential flow impulse turbine.
- Statement 2 is incorrect because the Francis turbine is an axial flow reaction turbine, not an impulse turbine.
- Statement 3 is incorrect because the Kaplan turbine is a radial flow reaction turbine, not an impulse turbine.
Therefore, the correct statement is option B: 1 alone.
- The Pelton wheel is a type of impulse turbine that converts the kinetic energy of a jet of water into mechanical energy.
- It is named after its inventor, Lester Allan Pelton.
- The Pelton wheel is a tangential flow turbine, which means that the water jet strikes the turbine buckets tangentially.
- The water jet is directed onto the buckets by a nozzle, and as the water strikes the buckets, it imparts a tangential force.
- The tangential force causes the wheel to rotate, and the mechanical energy is then extracted from the rotating wheel.
Francis Turbine:
- The Francis turbine is a type of reaction turbine that converts the potential energy of water into mechanical energy.
- It is named after its inventor, James B. Francis.
- The Francis turbine is an axial flow turbine, which means that the water flows parallel to the axis of rotation of the turbine.
- The water enters the turbine through a spiral casing and flows over the blades of the rotor.
- As the water flows over the blades, it exerts a force on them, causing the rotor to rotate.
- The mechanical energy is then extracted from the rotating rotor.
Kaplan Turbine:
- The Kaplan turbine is another type of reaction turbine that is commonly used for low-head applications.
- It is named after its inventor, Viktor Kaplan.
- The Kaplan turbine is a radial flow turbine, which means that the water flows radially outward from the center of the turbine.
- The water enters the turbine through a spiral casing and flows over the blades of the rotor.
- As the water flows over the blades, it exerts a force on them, causing the rotor to rotate.
- The mechanical energy is then extracted from the rotating rotor.
Correct Statements:
- Statement 1 is correct because the Pelton wheel is indeed a tangential flow impulse turbine.
- Statement 2 is incorrect because the Francis turbine is an axial flow reaction turbine, not an impulse turbine.
- Statement 3 is incorrect because the Kaplan turbine is a radial flow reaction turbine, not an impulse turbine.
Therefore, the correct statement is option B: 1 alone.
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Consider the following statements:1. Pelton wheel is a tangential flow impulse turbine2. Francis turbine is an axial flow reaction turbine3. Kaplan turbine is a radial flow reaction turbineWhich of the above statements is/ are correct?a)1 and 3b)1 alonec)2 aloned)3 aloneCorrect answer is option 'B'. Can you explain this answer?
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