alleryA railway with three or four rails so that trains of two gauges can use it is called what?
ARack railway
BSingle monorail
CLight tramway
DDual gauge railway
Answer & Solution
Correct answer: D. Dual gauge railway
1. Extra rails let trains with different gauges share one track.
2. Such a track is called a dual gauge railway.
3. A rack railway has a toothed rail for steep slopes, and a monorail has a single rail.
_Source: Wikipedia, Transport, section Rail_
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