What is the TODB of the specified train after accounting for dynamic brake limitations?

The Train Operating Dynamic Brake (TODB) reflects the effective braking capability of a train when using both dynamic and air brakes. The context of dynamic brake limitations means that the actual performance of the dynamic brakes is being considered, which can be influenced by factors such as train weight, speed, and track gradient.

If the specified train's TODB is determined to be 303 after accounting for any dynamic brake limitations, this suggests that the dynamic brake system was functioning within its capacity, and the potential reduction in braking effectiveness due to limitations was effectively considered. The choice of 303 indicates that the dynamic brakes operated optimally under the given conditions, allowing the train to achieve a reliable braking performance.

Other answer choices reflect different potential computations or estimations of TODB that, when accounting for dynamic brake limitations, would not align as closely with the reliable operational threshold for the specific train in question. The correct answer illustrates a proper understanding and calculation of dynamic braking capacity, ensuring that the train's stopping power remains safe and efficient during operations.