Which brakes perform an emrgency function in a tram?
Show the correct answer
Correct answer
C. The track brakes.
Explanation
The question is about the brakes that act as emergency brakes in a tram. These are the track brakes - answer C.
The rules require the emergency brake to brake regardless of the grip of the wheel on the rail. A track brake is an electromagnet lowered onto the rail, which sticks to it and brakes regardless of the grip of the wheels. Thanks to this, it stops the tram faster, also on slippery rails, which is why it is used in emergency situations, for example during sudden braking or after the dead man's device is released. The electrodynamic brake (answer A) is used for normal, smooth braking, and the shoe brake (answer B) stops the tram in the final stage and holds it while it is stationary.
Legal basis: § 16 para. 1 point 2 of the Regulation of the Minister of Infrastructure of 2 March 2011 on the technical conditions of trams and trolleybuses and the scope of their necessary equipment (Dz.U. nr 65 poz. 344)