When a trolley is working on T/1518 during thick or foggy weather, the speed is A. 5 kmph B. 8 kmph C. 10 kmph D. None of these

The correct answer is D. None of these.

The speed of a trolley working on T/1518 during thick or foggy weather is not specified in the relevant regulations. The regulations only state that the speed of a trolley must be “safe and reasonable”. In thick or foggy weather, it is important to drive slowly and carefully to avoid accidents.