Number of dog spikes normally used per rail seat on curved track is__________________?

A. one on either side

B. two outside and two inside

C. one outside and two inside

D. two outside and one inside

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.