Which of the following brakes will be activated if you release the dead man's switch while driving?
Show the correct answer
Correct answer
C. Emergency braking ( rail, shoe and at the minimum the electrodynamic brakes).
Explanation
The question is about what happens when you release the dead man's device while driving. Emergency braking will be activated, that is the track brake, the shoe brake and, to a minimal extent, the electrodynamic brake - answer C.
The dead man's device is a safeguard in case the tram driver faints or loses consciousness. Releasing it while driving causes emergency braking using all the brakes of the tram - the track brakes stick to the rails, and the shoe brakes and, to a small extent, the electrodynamic brake additionally brake the wheels. That is why it is not only the track brakes (answer A) or only the shoe brakes (answer B) that work. Emergency braking is violent and passengers may fall, so you keep the dead man's device pressed for the whole time you are driving.
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)