What is the correct uncoupling procedure for M915?

Answer: B — Chock blocks, lower landing gear, disconnect cables, secondary lock, primary lock, move forward

The correct answer details a comprehensive and safe uncoupling procedure for the M915. This procedure begins with the use of chock blocks, which are crucial for preventing unintended movement of the vehicle while it is being uncoupled. This step ensures that the vehicle remains stable and secure during the transition. Following the placement of chock blocks, lowering the landing gear is the next critical step. This process supports the trailer after it has been detached and ensures that it remains upright and stable, avoiding any risk of tipping or movement, which could pose safety hazards to personnel and equipment. Disconnecting the cables is next and involves separation of the electrical and air lines. Care must be taken to ensure that this step is completed correctly to prevent damage to the connections. The procedure also specifies engaging the secondary lock and primary lock. These locks are safety features designed to prevent accidental disconnection while moving or operating the vehicle, ensuring a secure and controlled uncoupling process. Lastly, moving forward with the tractor is the final step, allowing the operator to fully disengage from the trailer once it has been safely supported and all connections have been properly withdrawn. This methodical approach prioritizes safety and reduces the risk of accidents, making it the optimal uncoupling procedure for the