Union Pacific Air Brakes Practice Test

The maximum number of consecutive cars with cutout air brake devices that can be placed together in a train is limited to two cars. This limitation is based on safety regulations that ensure effective braking across the entire train. Having more than two consecutive cars with cutout devices could adversely affect the braking capabilities of the train, potentially leading to insufficient braking force in the event of an emergency. By restricting the number of cars with cutout devices to two, the integrity of the train's overall braking system is maintained, ensuring that adequate control can be exercised to safely stop the train when necessary. Regulatory guidelines and safety standards emphasize the importance of maintaining function and reliability in air brake systems, which is why the limitation is set at two cars.