10% less of sectional speed
10% less of booked speed
No need to reduced speed
40 kmph
Answer is Right!
Answer is Wrong!
The correct answer is: A. 10% less of sectional speed.
The sectional speed is the maximum speed at which a train can run in a particular section of track. The booked speed is the maximum speed at which a train can run under normal conditions. When the speedometer fails, the train should be run at 10% less of the sectional speed. This is to ensure that the train does not exceed the safe speed limit.
Option B is incorrect because it is the booked speed, not the sectional speed, that should be reduced by 10%.
Option C is incorrect because the train should always be run at a safe speed, even if the speedometer is working.
Option D is incorrect because it is the sectional speed, not 40 kmph, that should be reduced by 10%.