5 kmph
10 kmph
15 kmph
20 kmph
Answer is Right!
Answer is Wrong!
The correct answer is A. 5 kmph.
When the water level is just above the top of the rail, the speed of the electric locomotive shall be 5 kmph. This is because the locomotive is at risk of derailment if it travels at a higher speed. The water can cause the locomotive to lose traction and slide off the rails.
Option B is incorrect because it is too high a speed. The locomotive is at risk of derailment if it travels at this speed.
Option C is incorrect because it is too low a speed. The locomotive will not be able to move at this speed.
Option D is incorrect because it is not a valid option.