8 km
10 km
15 km
25 km
Answer is Right!
Answer is Wrong!
The correct answer is A. 8 km/h.
During TSL working in thick and foggy weather, the speed of the first train shall not exceed 8 km/h. This is to ensure the safety of the train and its passengers. In thick and foggy weather, visibility is reduced, which makes it difficult for the train driver to see the track ahead. By reducing the speed of the train, the train driver has more time to react to any obstacles or hazards that may be on the track.
Option B is incorrect because 10 km/h is too fast for safe operation in thick and foggy weather. Option C is incorrect because 15 km/h is also too fast for safe operation in thick and foggy weather. Option D is incorrect because 25 km/h is much too fast for safe operation in thick and foggy weather.