First Aid Exam Taken from the 2017 Northern Regional Contest held in Clymer, New York Progress Indicator: Question 3 of 30 3.  Using Sentinel which of the following would not produce a successful high pressure leak test? Choices: Open Cylinder Valve is displaye Oxygen cylinder pressure below 2,600 psi “X” is displayed with 4 bleeps and red LEDs flashing. Both and None of the above