Chains, Ropes, and Slings Test II Source: Questions and answers from the National Safety Council Progress Indicator: Question 4 of 22 4.  Immediately after the blast, perform the following steps: 1) ventilate, 2) visually assess the area for any ground movement caused by the blast , 3) wash down the entire heading and muck pile, do a detailed inspection of the ribs and back. Choices: true false