Personal Protective Equipment and Self-Contained Breathing Apparatus No. 3 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 3 of 22 3.  On main haulage roads, both rails shall be bonded, except welded track, and cross bonds shall be placed at points not to exceed __________ apart. Choices: 200 feet 500 feet 600 feet 1,000 feet