Fire Detection, Protection and Suppression Systems No. 2 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 3 of 18 3.  Temporary bulkheads built in a passageway should be placed at least 4 to 6 feet into the passageway in order that: Choices: Sufficient space is available to construct a permanent bulkhead. It will be protected from further explosions. It will not be affected by fire if a fire should spread to that passageway. All of the above