Which of the following types of brakes can not be checked at the depot?
Show the correct answer
Correct answer
B. The electrodynamic brakes
Explanation
In the photo you can see the snow-covered area of a depot with tracks and a speed limit sign. At the depot you cannot check the electrodynamic brakes - answer B.
The electrodynamic brake works only when the tram is moving at a suitable speed, because the traction motors must work as generators. So it cannot be checked at the depot, where you drive very slowly. Drum brakes, that is shoe brakes (answer A), and track brakes (answer C) can be checked when the tram is stationary or at low speed. You check the electrodynamic brake at the start of the route in passenger service, once the tram has picked up speed. You check the shoe brakes and track brakes while still at the depot.
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)