2015 Coal First Aid Statements No. 4 Taken from the 2015 National Coal First Aid Contest Rules Progress Indicator: Question 1 of 20 1.  Which one of the following improves ventilations delivered by way of a bag-mask device? Choices: Inserting an oropharyngeal airway Applying suction for four to six minutes Alternating chest thrusts and squeezing the bag Combining finger sweeps with a mouth-to-mouth technique