What setting of the reverser may cause the inability to drive a two-carriage tram?
Show the correct answer
Correct answer
B. In the first carriageit is set to "P" in the second carriage to "P".
Explanation
In the drawing we see three settings of the reversers in a two-coach tram. A two-coach tram may be unable to move if the reverser in the first coach is set to "P" and the reverser in the second coach is also set to "P" - the answer is B.
The reverser is the switch for the direction of travel: position "P" means driving forwards, "T" means driving backwards, and "0" is the neutral position, in which the tram does not move. In a two-coach tram, the tram is controlled from the cab of the first coach, and the reverser in the second coach should be in position "0". If it is at "P", the control system of the tram does not allow it to move off. Settings A (driving forwards) and C (driving backwards) are correct, because the second coach has "0".
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)