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GATE Past Year Questions: Flywheel | Theory of Machines (TOM) - Mechanical Engineering PDF Download

Question for GATE Past Year Questions: Flywheel
Try yourself:The speed of an engine varies from 210 rad/s to 190 rad/s. During cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kg-m2 is

[2007]

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Question for GATE Past Year Questions: Flywheel
Try yourself:For a certain engine having an average speed of 1200 rpm, a flywheel approximated as a solid disc, is required for keeping the fluctuation of speed within 2% about the average speed. The fluctuation of kinetic energy per cycle is found to be 2 kJ. What is the least possible mass of the flywheel if its diameter is not to exceed 1 m?

[2003]

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Question for GATE Past Year Questions: Flywheel
Try yourself:If Cf is the coefficient of speed fluctuation of a flywheel then the ratio of wmax /wmin will be

[2006]

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Question for GATE Past Year Questions: Flywheel
Try yourself:Which of the following statements is correct?

[2001]

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Question for GATE Past Year Questions: Flywheel
Try yourself:A flywheel of moment of inertia 9.8 kg m2 fluctuates by 30 rpm for a fluctuation in energy of 1936 Joules. The mean speed of the flywheel is (in rpm)

[1998]

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FAQs on GATE Past Year Questions: Flywheel - Theory of Machines (TOM) - Mechanical Engineering

1. What is a flywheel in mechanical engineering?
Ans. A flywheel is a mechanical device used to store rotational energy. It is typically a heavy wheel or disc that is mounted on an axle and is used to maintain a constant speed of a machine or system by storing and releasing energy as needed.
2. How does a flywheel work in mechanical engineering?
Ans. A flywheel works by storing energy in its rotating mass. When energy is supplied to the flywheel, it increases its rotational speed, and when energy is extracted from the flywheel, it slows down. This stored energy can be used to provide power during periods of high demand or to maintain a constant speed in a system.
3. What are the applications of flywheels in mechanical engineering?
Ans. Flywheels have various applications in mechanical engineering. Some common applications include: - In engines: Flywheels are used to smooth out the power delivery and reduce vibrations in internal combustion engines. - In energy storage systems: Flywheels can be used to store excess energy and release it when needed, such as in hybrid vehicles or renewable energy systems. - In machining: Flywheels can be used to maintain a constant rotational speed in machines like lathes or milling machines.
4. What are the advantages of using flywheels in mechanical systems?
Ans. There are several advantages of using flywheels in mechanical systems. Some key advantages include: - Energy storage: Flywheels can store energy in a compact and efficient manner, allowing for the smooth operation of machines or systems. - Power stabilization: Flywheels can help stabilize power output and compensate for fluctuations in energy supply or demand. - Durability: Flywheels are often made of strong materials and can withstand high rotational speeds, making them durable and long-lasting.
5. What are the challenges and limitations of using flywheels in mechanical engineering?
Ans. While flywheels have many advantages, they also come with certain challenges and limitations. Some of these include: - High rotational speed: To store a significant amount of energy, flywheels need to rotate at high speeds, which can pose challenges in terms of safety and mechanical stress. - Energy losses: Despite their efficiency, flywheels still experience some energy losses due to friction and air resistance, which can reduce their overall effectiveness. - Size and weight: Flywheels can be large and heavy, which may limit their use in certain applications where space and weight are restricted.
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