PA Mining Law - Sections 251-260 (2) Practice test questions for the PA Mine Officials' Exam Progress Indicator: Question 4 of 16 4.  Up to what amount of shower time per victim would be ideal when using dilution during mass decontamination operations? p. 453 Choices: 2 to 3 minutes 5 to 6 minutes 3 to 4 minutes 4 to 5 minutes