In what situation is it recommended to use sandboxes constituting an equipment on the tram?
Show the correct answer
Correct answer
C. On slippery rail.
Explanation
In the photo we see a tram wheel on a rail and the sander pipe through which sand is poured in front of the wheel. Using the sanders is recommended on a slippery rail - the answer is C.
Sand poured between the wheel and the rail increases friction, so the wheels do not spin when moving off and do not lock when braking. A rail may be slippery for various reasons: leaves, frost, ice, the first drops of rain or grease. Limiting the use of the sander only to water (answer A) or only to snow (answer B) is wrong. However, you do not pour sand when it is not needed, because it makes the tram tracks and the points dirty.
Legal basis: § 16 para. 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)