What is the first step when placing a dual-controlled power-operated switch in hand position?

Answer: B — Unlock the switch lock

The first step when placing a dual-controlled power-operated switch in hand position is to unlock the switch lock. This is essential because the switch lock is a safety mechanism designed to prevent unauthorized or unsafe operation of the switch. Unlocking the switch allows the operator to gain the necessary access to operate the switch manually without any restriction. Once the switch is unlocked, the operator can proceed with the next steps, such as aligning the switch points or locking it in position once the desired alignment is achieved. This sequence ensures safety and proper operation of the switch before making any adjustments or notifying other personnel, such as the train dispatcher. Hence, unlocking the switch lock is a critical first action in this process.