The cutting-key is most closely associated with which component in operation?

The cutting-key is primarily associated with the coupler in train operations. In the context of railway systems, a coupler is a mechanism that connects two railroad cars, allowing them to operate together as part of a train. The cutting-key plays a crucial role in ensuring that the coupler functions reliably and securely.

When trains are being assembled or disassembled, the cutting-key helps in the alignment and locking mechanism of the couplers, facilitating a safe connection between cars. This ensures that the trains maintain structural integrity while in motion and can handle the forces applied during operation, such as acceleration, braking, and turning.

Understanding the function of the cutting-key in relation to the coupler is essential for train operators, as it emphasizes the importance of proper equipment maintenance and safety practices when connecting or disconnecting train cars.