What safety measure is taken when keying by a signal with caution?

What safety measure is taken when keying by a signal with caution?

• A. Accelerating past the signal
• B. Ensuring the tripper arm is in a clear position before proceeding
• C. Using all available signals
• D. Waiting for another train to pass

Answer: (B)

When keying by a signal with caution, the safety measure involves ensuring that the tripper arm is in a clear position before proceeding. This is crucial because the tripper arm serves as a mechanism to indicate whether the track section is clear and safe for the train to move forward. By confirming that the tripper arm is in the correct position, the operator can be assured that it is safe to proceed past the signal, thereby reducing the risk of accidents or collisions. In contrast, the other choices do not contribute to safety in the same way. Accelerating past the signal can lead to dangerous situations, especially if the signal is indicating a stop for important reasons. Using all available signals without proper understanding or verification does not ensure safety as some signals might be misleading or context-dependent. Lastly, waiting for another train to pass does not necessarily relate to the keying by signal procedure and could be less relevant in instances where the signal indicates that it is safe to proceed, as long as the tripper arm is checked accordingly.

When keying by a signal with caution, the safety measure involves ensuring that the tripper arm is in a clear position before proceeding. This is crucial because the tripper arm serves as a mechanism to indicate whether the track section is clear and safe for the train to move forward. By confirming that the tripper arm is in the correct position, the operator can be assured that it is safe to proceed past the signal, thereby reducing the risk of accidents or collisions.

In contrast, the other choices do not contribute to safety in the same way. Accelerating past the signal can lead to dangerous situations, especially if the signal is indicating a stop for important reasons. Using all available signals without proper understanding or verification does not ensure safety as some signals might be misleading or context-dependent. Lastly, waiting for another train to pass does not necessarily relate to the keying by signal procedure and could be less relevant in instances where the signal indicates that it is safe to proceed, as long as the tripper arm is checked accordingly.