Which statement describes the upper limit of the service braking for the LRV/train?

Which statement describes the upper limit of the service braking for the LRV/train?

• A. The lower limit of braking effort.
• B. The braking system used only during emergencies.
• C. The braking that occurs during normal operation only.
• D. The upper limit of the service braking effort normally required to stop the LRV/train, consisting of both dynamic and friction brakes as needed.

Answer: (C)

The service braking system is the braking used during normal operation, and it has a range of effort from lighter to the maximum that can be applied within service braking. The upper limit of this service braking is the maximum braking force normally available to stop the train, and it is achieved by using both dynamic (regenerative) braking and friction brakes as needed. This describes the greatest braking effort you would rely on under normal conditions, combining the two types for effective stopping. The other ideas don’t fit as well because one describes only the minimum level of braking, another refers to emergency braking (not service), and another just mentions normal-operation braking without specifying that it’s the maximum available within service or the combination of brake types.

The service braking system is the braking used during normal operation, and it has a range of effort from lighter to the maximum that can be applied within service braking. The upper limit of this service braking is the maximum braking force normally available to stop the train, and it is achieved by using both dynamic (regenerative) braking and friction brakes as needed. This describes the greatest braking effort you would rely on under normal conditions, combining the two types for effective stopping.

The other ideas don’t fit as well because one describes only the minimum level of braking, another refers to emergency braking (not service), and another just mentions normal-operation braking without specifying that it’s the maximum available within service or the combination of brake types.