15
20
35
10
Answer is Right!
Answer is Wrong!
The correct answer is: 10 days.
A caution order is issued to the loco pilot for 10 days whenever a new signal is placed. This is done to ensure that the loco pilot is familiar with the new signal and its location before they are required to pass it.
The other options are incorrect because they are not the correct number of days for which a caution order is issued to the loco pilot whenever a new signal is placed.