Final answer:
The best course of action if a train does not roll freely during a prescribed brake test is to report the issue immediately for inspection and resolution before resuming operation.
Step-by-step explanation:
When making the prescribed brake test upon leaving a terminal, if a train operator notices that the train does not roll freely when the controller is moved to the first point and then shut off, the best course of action would be to report the issue immediately to the maintenance department or control center. Continuing to operate a train with potential brake issues poses a significant safety risk. The train should be inspected and any issues resolved before it is put back into service. This procedure ensures passenger and operator safety and is consistent with industry practices.