What should you do if there is no release light on the train?

Answer: D — Look for air or handbrake applied

If there is no release light on the train, it is essential to look for any air or handbrakes that may be applied. The absence of a release light indicates that the brakes are not fully released, which could be due to one or more handbrakes being set or a problem in the air brake system. By checking for applied air or handbrakes, you can identify the cause of the issue and ensure that the train is in a safe operating condition before proceeding. If the air brakes are still applied, it could prevent movement and may require corrective actions to ensure that the train can operate safely and efficiently. This action is crucial for maintaining safety standards during train operations and ensuring the brake system is functioning as intended.