Two short
Three short
One short
Noen of these
Answer is Right!
Answer is Wrong!
The correct answer is A. Two short.
The Loco Pilot shall sound two short whistles if the SM do not exchange hand signals. This is to alert the SM that there is a problem and that they need to communicate with the Loco Pilot.
The other options are incorrect. Option B is incorrect because three short whistles are used to indicate that the train is about to start moving. Option C is incorrect because one short whistle is used to indicate that the train is about to stop. Option D is incorrect because it is not a valid option.