Guard shall show ____________ light by night to the SM, if the train is standing clear of fouling mark.
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A.
White.
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B.
Yellow.
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C.
Green.
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D.
Red.
Correct Answer:
A. White.
Explanation:
The correct answer is White.
In railway signaling protocols, a Guard uses a white light at night to signal the Station Master (SM) that the train has arrived and is standing completely clear of the fouling mark. This ensures that the train is safely positioned within the siding or station limits and does not obstruct the passage of other trains on adjacent tracks. While green and red lights are typically used for "proceed" and "stop" indications respectively, the white light specifically serves as a confirmation of clear standing during nighttime operations.
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