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GATE Previous Year Questions: Band Brake, Machine Design Video Lecture - Mechanical Engineering

FAQs on GATE Previous Year Questions: Band Brake, Machine Design Video Lecture - Mechanical Engineering

1. What is a band brake and how does it work?
Ans. A band brake is a type of braking mechanism used in machines and vehicles. It consists of a flexible band that is wrapped around a drum or pulley. When the brake is applied, the band tightens around the drum, causing friction and slowing down or stopping the rotation of the drum.
2. What are the advantages of using a band brake in machine design?
Ans. Band brakes have several advantages in machine design. They are compact, lightweight, and easy to install. They also provide a high torque capacity and can handle large loads. Additionally, band brakes offer smooth and consistent braking action, making them suitable for applications that require precise control.
3. How is the braking force of a band brake calculated?
Ans. The braking force of a band brake can be calculated using the formula: Braking force = Coefficient of friction × Normal force × Effective radius The coefficient of friction is the measure of the frictional force between the band and the drum, the normal force is the force pressing the band against the drum, and the effective radius is the radius at which the braking force is applied.
4. What are some common applications of band brakes?
Ans. Band brakes are commonly used in various applications, including automobiles, industrial machinery, elevators, cranes, and winches. They are also used in bicycles, motorcycles, and other vehicles where space and weight are constraints.
5. How can the performance of a band brake be improved?
Ans. The performance of a band brake can be improved by using materials with higher coefficients of friction, ensuring proper tension in the band, increasing the surface area of the drum, and applying the braking force at a larger effective radius. Additionally, regular maintenance and lubrication can help maintain optimal performance.
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