What is the Brake Cylinder pressure in an emergency situation?

In an emergency situation, the Brake Cylinder pressure typically needs to be significantly higher to ensure rapid and effective braking. The correct choice of 280kPa aligns with the standards used in railway systems for pneumatic braking in emergencies, where quick deceleration is crucial for safety. This pressure is designed to create a strong force applied to the brake system, allowing for a rapid reduction in speed or a complete stop.

Other options presented refer to pressures that may be more applicable to standard operational conditions or other levels of braking but do not provide the necessary force needed during emergency braking scenarios, thus explaining their inapplicability in this context. Understanding the requirements for brake cylinder pressure in emergencies is critical for maintaining safety in railway operations.