Dog spikes are used for fixing rail to the__________________?

A. 6155 mm2
B. 6615 mm2
C. 7235 mm2
D. 7825 mm2

A. detectors
B. point lock
C. iock bar
D. stretcher bar

A. 61.9 mm
B. 66.7mm
C. 67mm
D. 72.33 mm

A. 100 mm
B. 122.2 mm
C. 136.5 mm
D. 146.0 mm

A. head
B. web
C. foot
D. head and foot both

A. less than 2 mm/m
B. more than 2 mm/m
C. less than 4 mm/m
D. more than 4mm/m