At switch(es) equipped with an electric lock, the train movement may begin as soon as?

At switch(es) equipped with an electric lock, the train movement may begin as soon as?

• A. The switch(es) have been measured for clearance.
• B. The switch(es) have been properly lined.
• C. The dispatcher approves movement verbally.
• D. The bolt lock is engaged.

Answer: (B)

Electric lock switches are set up so the train may move as soon as the switch is properly lined for the intended route. The locking mechanism guarantees the switch points are in the correct position and locked, preventing movement unless the alignment is correct. Once the switch is confirmed to be properly lined, movement is authorized. Simply measuring clearance doesn’t verify the switch is set for the route, and verbal dispatcher approval isn’t required when the electric lock system is in place. The bolt lock engaging happens after the switch is lined and secured, not as the condition to begin movement.

Electric lock switches are set up so the train may move as soon as the switch is properly lined for the intended route. The locking mechanism guarantees the switch points are in the correct position and locked, preventing movement unless the alignment is correct. Once the switch is confirmed to be properly lined, movement is authorized. Simply measuring clearance doesn’t verify the switch is set for the route, and verbal dispatcher approval isn’t required when the electric lock system is in place. The bolt lock engaging happens after the switch is lined and secured, not as the condition to begin movement.