What maximum speed is allowed when coupling with spear-type couplers?

The maximum speed allowed when coupling with spear-type couplers is 2 MPH. This speed limit is established for safety reasons to minimize the risk of derailment or uncoupling during the coupling process. When trains are coupled at higher speeds, it can result in sudden impacts that may cause damage to the equipment or pose a risk to personnel involved in the operation.

Spear-type couplers are designed to connect cars but require careful handling to ensure they engage properly without causing accidents. A reduced speed allows crew members to maintain better control and awareness of the coupling process, effectively reducing the possibility of incidents and ensuring both operational safety and integrity of the rolling stock.

Other speeds listed in the choices exceed this limit, which would not align with the safety protocols for coupling operations using spear-type couplers.