PA Mining Law - Sections 407-410 (1) Practice test questions for the PA Mine Officials' Exam Progress Indicator: Question 2 of 16 2.  Which is a common feature when operating a semi-automated defibrillator? Choices: A button must be pushed to begin the analysis phase All four leads must be placed on the patient's chest Adhesive jelly must be applied under the pads Operator must push a button to deliver the shock