Podcast
Questions and Answers
What is the primary purpose of holding the breath for 10 seconds while testing the facepiece?
What is the primary purpose of holding the breath for 10 seconds while testing the facepiece?
- To test the durability of the facepiece material.
- To check the air quality inside the facepiece.
- To ensure the facepiece maintains a negative pressure. (correct)
- To measure the flow rate of the regulator.
Which of the following steps is NOT part of checking the functionality of the control module?
Which of the following steps is NOT part of checking the functionality of the control module?
- Listen for the primary low pressure warning alarm to sound.
- Inhale deeply after attaching the regulator. (correct)
- Ensure the bypass knob is fully closed.
- Observe the LED starting sequence on the regulator.
How should the pressure gauge and the LCD display be compared during testing?
How should the pressure gauge and the LCD display be compared during testing?
- They should indicate that pressure is increasing steadily.
- They should show exactly the same reading.
- They should be consistent within 5% of cylinder pressure. (correct)
- They should be consistent within 10% of cylinder pressure.
What indicates that the bypass knob is correctly closed during the testing process?
What indicates that the bypass knob is correctly closed during the testing process?
What action must be taken to start the pressure check after closing the bypass knob?
What action must be taken to start the pressure check after closing the bypass knob?
What should happen to the buddy lights during the system check?
What should happen to the buddy lights during the system check?
When testing, what is the effect of creating an effective seal with the facepiece?
When testing, what is the effect of creating an effective seal with the facepiece?
Which component is used to reset the motion alarm on the control module?
Which component is used to reset the motion alarm on the control module?
What is the initial step in the HUD activation process?
What is the initial step in the HUD activation process?
What should be done after pushing the regulator release buttons?
What should be done after pushing the regulator release buttons?
At what pressure should the control module pressure reading drop below to activate the flashing LED in the HUD?
At what pressure should the control module pressure reading drop below to activate the flashing LED in the HUD?
What indicates that air pressure is critically low in the system?
What indicates that air pressure is critically low in the system?
What happens when the system pressure falls below 200 PSI?
What happens when the system pressure falls below 200 PSI?
What is indicated by the buddy lights flashing red?
What is indicated by the buddy lights flashing red?
Which step should be performed last in the process?
Which step should be performed last in the process?
How many times should the reset button be pressed to turn off the control module at low pressure?
How many times should the reset button be pressed to turn off the control module at low pressure?
What is the purpose of slowly opening the bypass valve after removing the facepiece?
What is the purpose of slowly opening the bypass valve after removing the facepiece?
What should you do immediately after allowing the control module to remain motionless for 20 seconds?
What should you do immediately after allowing the control module to remain motionless for 20 seconds?
Which indication confirms that the PASS full alarm has activated?
Which indication confirms that the PASS full alarm has activated?
How can you manually activate the PASS alarm?
How can you manually activate the PASS alarm?
What is the correct procedure to reset the PASS alarm?
What is the correct procedure to reset the PASS alarm?
What should you verify about the regulator during use?
What should you verify about the regulator during use?
What action should you take before attaching the regulator to the facepiece?
What action should you take before attaching the regulator to the facepiece?
When is it appropriate to inhale sharply during the procedure?
When is it appropriate to inhale sharply during the procedure?
What should you confirm about the LED on the speaker module at the end of the procedure?
What should you confirm about the LED on the speaker module at the end of the procedure?
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Study Notes
Checking Regulator and Facepiece for Negative Pressure
- Close the cylinder valve and purge air using the bypass knob or purge cover.
- Press the facepiece against the face for a seal.
- Attach regulator to facepiece, inhale to collapse the facepiece against the face.
- Maintain breath for about 10 seconds; the facepiece should stay collapsed during this time.
Functionality Check of Control and Power Modules
- Ensure bypass knob is fully closed (turned clockwise).
- Pressurize system by opening the cylinder valve.
- Observe LED starting sequence on the regulator.
- Listen for brief sounds from the power module and primary low pressure alarm.
- Confirm buddy lights are flashing green.
- Check that pressure gauge and LCD display show accurate pressure, within 5% consistency (225 PSI) of cylinder pressure.
- Both reset buttons on the control module serve the same purpose; utilize one for the motion alarm and the other for the manual alarm test.
Verification of HUD and Warning Devices
- Perform tests with a full cylinder, observing control module gauge/display during alarm sounds.
- Allow control module to remain still for about 20 seconds; listen for PASS pre-alarm tones.
- Confirm buddy lights and red LED in HUD flash red during pre-alarm.
- Shake control module to reset alarm before it turns into full alarm.
- Allow control module to stay motionless until full alarm sounds (in 30 seconds).
- Listen for tones of PASS full alarm; verify buddy lights and red LED remain activated.
- Press the left reset button twice in quick succession to reset the PASS alarm.
- Check manual PASS alarm activation by holding the button until alarm activates; verify subsequent flashing red indicators.
- Press the right reset button twice to reset the PASS alarm again.
Regulator and Speaker Module Functions
- Close cylinder valve entirely, don or hold facepiece for a seal.
- Attach regulator, ensuring secure fit by pulling on it.
- Inhale sharply to initiate airflow, then breathe normally to check regulator response.
- Regulator should operate quietly without strange sounds like whistling or popping, and air must flow freely.
- Test speaker module by talking into facepiece; to turn OFF, press and hold ON/OFF button until the tone sounds, confirming LED is OFF.
Operations and Alarms Management
- Activate the speaker module by pressing and holding the on/off button until the tone sounds.
- Push regulator release buttons to stop airflow before removing the facepiece.
- Close the cylinder valve securely.
- Open bypass valve to vent pressure, confirming control module pressure drops below approximately 1575 PSI.
- A flashing red LED must appear in HUD at designated pressure; primary low pressure warning device should alarm and buddy lights flash red.
- Alarms persist until pressure is at or falls below 200 PSI.
- Turn off control module by pressing the reset button twice once pressure is below 200 PSI.
- Open and close bypass valve to release any remaining pressure.
- Stow SCBA properly after operations.
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