Answer :
Final answer:
Exceptions that require a coupling speed of no more than 1 MPH include coupling onto loaded or partially loaded flat cars, tank cars, and cars with end-of-train devices, or when operating in LCS mode. These stringent speed controls help prevent damage and ensure safety during the coupling process.
Explanation:
When coupling to equipment, it is often mandated that the speed of such operations must be kept at safe limits to prevent damage to the equipment or the goods being transported. In scenarios when it is necessary to maintain even more stringent speed controls, a coupling speed of no more than 1 MPH is required. Based on the question provided, the exceptions requiring a reduced coupling speed of no more than 1 MPH include:
Coupling on to a loaded bulkhead flat car.
When operating in LCS (Beltpack) mode.
Coupling on to a loaded tank car.
Coupling on to the end of a car that has the EOT (End of Train device) or SBU (Sense and Braking Unit) attached.
Coupling on to a partially loaded car where stability may be a concern.
The provided references to the physical properties and dynamics of a freight car under loading shed light on the importance of managing coupling speeds to maintain stability and prevent incidents such as derailing or excessive force during impact.
