Which circuit breakers tripping will cause an Emergency brake to activate?

The correct answer encompasses both the Automatic Coupler Control and the Emergency Brake Valve because tripping of either can lead to the activation of the emergency brake system.

The Automatic Coupler Control is an essential mechanism that ensures the integrity of the train's connections. If for any reason this control is tripped, it indicates that there is a problem with the connection between train cars. This safety feature ensures that if there's a failure, it triggers the emergency braking system to prevent derailment or other safety hazards.

On the other hand, the Emergency Brake Valve is specifically designed to activate the emergency braking system when it senses an emergency condition, ensuring rapid deceleration of the train to safeguard passengers and cargo.

Together, these components are crucial for maintaining safety on the rail system, and if there is a failure or tripping of either, it is a clear signal that the emergency brakes need to be activated to ensure the immediate safety of the train and its occupants.