When the calling on signal is taken off, it indicates the loco pilot to proceed ________ and be prepared to stop short of any obstruction. A. Caution B. Cautiously C. Defective D. None of these

The correct answer is: B. Cautiously

When the calling on signal is taken off, it indicates the loco pilot to proceed cautiously and be prepared to stop short of any obstruction. This is because the signal is no longer in the “on” position, which means that the track ahead may not be clear. The loco pilot must therefore proceed slowly and carefully, and be prepared to stop if necessary.

The other options are incorrect. Option A, “Caution,” is not a complete sentence. Option C, “Defective,” is not a correct interpretation of the signal. Option D, “None of these,” is also incorrect.

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