What is the purpose of a dynamic brake on a locomotive?

What is the purpose of a dynamic brake on a locomotive?

• A. To increase speed quickly
• B. To reduce speed by creating electrical resistance
• C. To stop the train abruptly
• D. To maintain a constant speed

Answer: (B)

The purpose of a dynamic brake on a locomotive is to reduce speed by creating electrical resistance. This braking method works by using the traction motors of the locomotive, which are converted into generators during dynamic braking. As the locomotive’s wheels turn, the motion generates electrical energy, which is then dissipated as heat through resistors. This process slows down the train effectively without the use of friction brakes, which helps in reducing wear and tear on brake components. Dynamic braking is especially useful when descending grades or when a more controlled reduction of speed is necessary without the suddenness of traditional brakes. By converting kinetic energy into electrical energy, the dynamic brakes provide a gentle and efficient means to manage train speed.

The purpose of a dynamic brake on a locomotive is to reduce speed by creating electrical resistance. This braking method works by using the traction motors of the locomotive, which are converted into generators during dynamic braking. As the locomotive’s wheels turn, the motion generates electrical energy, which is then dissipated as heat through resistors. This process slows down the train effectively without the use of friction brakes, which helps in reducing wear and tear on brake components.

Dynamic braking is especially useful when descending grades or when a more controlled reduction of speed is necessary without the suddenness of traditional brakes. By converting kinetic energy into electrical energy, the dynamic brakes provide a gentle and efficient means to manage train speed.