PA Mining Law XVII (referenced) Practice test questions for the PA Mine Officials' Exam Progress Indicator: Question 1 of 20 1.  In order to become eligible for employment as a bituminous mine electrical inspector, an individual must be at least ______ years of age and have _______ years in an underground coal mine?  (Section 108) Choices: 30 and 10 20 and 5 21 and 5 25 and 10