Water Supply No. 5 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 5 of 20 5.  Which is NOT a correct guideline for protecting against possible secondary devices? p. 161 Choices: Manage the scene with cordons and boundaries Anticipate the presence of a secondary device at any suspicious incident Visually search for a secondary device while moving through the area Evacuate victims and nonessential personnel as quickly as possible