In which of these dangerous circumstances on the road does a vehicle equipped with the so-called ASR i.e. anti-skid system for a running vehicle come in handy?
Show the correct answer
Correct answer
C. In the case of sudden acceleration on a wet surface.
Explanation
The question is about the ASR system, which prevents the driven wheels from spinning when moving off and accelerating. It works best in a situation of sudden acceleration on a wet surface - answer C. When going downhill (A and B) the wheels do not spin, so ASR has nothing to do there.
ASR, also called traction control, uses the ABS sensors: when a driven wheel starts to turn faster than the others, that is, it spins, the control unit brakes it slightly or briefly reduces the engine torque until the wheel grips again. Thanks to this, on wet, snowy or icy asphalt the car moves off and accelerates without jerking or pulling to the side, and the driver does not have to control the accelerator pedal with extreme precision. The system does not increase grip - on ice it will still be slippery - it only stops you from wasting it. When going downhill, the problem is braking, not drive; there ABS and engine braking help. When the ASR warning light flashes while driving, it is a sign that the surface is slippery and you must drive more slowly.