Railway Engineering
Number of dog spikes normally used per rail seat on curved track is

one on either side
one outside and two inside
two outside and two inside
two outside and one inside

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Railway Engineering
Switch angle is the angle between

the outer face of the stock rail and the gauge face of the tongue rail
the gauge face of the stock rail and outer face of the tongue rail
the gauge face of the stock rail and tongue rail
the outer face of the stock rail and tongue rail

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