to join the two rails together

to join rails with the sleeper

to allow rail to expand and contract freely

none of the above

2

4

5

6

web of rail

fishing plane

head of rail

foot of rail

center to center of rails

running faces of rails

outer faces of rails

none of the above

only (i)

both (i) and (ii)

both (ii) and (iii)

(i), (ii) and (iii)