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SENTINEL Pressure Leak Test

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Questions and Answers

What is the recommended replacement interval for the battery in the Sentinel?

Every 24 months

Every 12 months

Every 3 months

Every 6 months (correct)

What is the purpose of the pressure relief valve in the breathing circuit?

To prevent ambient air from entering the system

To open when the pressure is between +20 and +50 mm of pressure (correct)

To maintain a constant pressure

To connect the BG-4 apparatus to the RZ-25 tester

What is the correct reading on the pressure gauge during the exhalation valve test if the valve is operating properly?

0 embar

-10 embar (correct)

+20 embar

+10 embar

What type of lubricant is recommended for O-rings in the breathing circuit?

Dow Corning 111 Signup and view all the answers

What is the maximum permissible pressure change during the positive pressure leak test within 1 minute?

Less than 1 embar Signup and view all the answers

What is the approved cartridge type for the BG-4 apparatus?

Both factory-packed and refillable cartridges Signup and view all the answers

What is the volume of the breathing bag in the BG-4 apparatus?

5.5 liters Signup and view all the answers

What is the minimum flow rate provided by the minimum valve?

80 L/min Signup and view all the answers

How often should the supply of oxygen gas on the Sentinel be checked?

Every 15 minutes Signup and view all the answers

What is the pressure range for medium pressure in the BG-4 apparatus?

58 psi - 64 psi Signup and view all the answers

What should be done with the belt and harness before storage?

Dry to prevent mold and fungus Signup and view all the answers

What happens when the pressure drops to approximately 700 psi?

The first low pressure warning occurs Signup and view all the answers