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Which beam pattern feature characterises a dipped headlamp?

  • A.An asymmetric cut off rising towards the nearside
  • B.A symmetrical pattern, which distributes the light evenly and therefore illuminates both sides of the road equally
  • C.A circular spot
  • D.A sharp horizontal cut off across the whole width, which prevents any light from reaching an oncoming driver at all

Answer: A

The cut off is horizontal on the offside to avoid dazzling oncoming traffic and rises on the nearside to light the verge and signs. A wholly flat cut off genuinely is used in some markets, which makes the last option a real alternative pattern. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Checking which component actually carries the load settles most questions of this kind at once. A single measurement chosen to respond to the one asymmetry beats several that respond to shared behaviour.

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