Respiratory Equipment Safety Procedures

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Questions and Answers

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?

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?

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?

No air escapes from the system. Signup and view all the answers

What action must be taken to start the pressure check after closing the bypass knob?

Open the cylinder valve. Signup and view all the answers

What should happen to the buddy lights during the system check?

They should flash green. Signup and view all the answers

When testing, what is the effect of creating an effective seal with the facepiece?

It maintains a negative pressure within the facepiece. Signup and view all the answers

Which component is used to reset the motion alarm on the control module?

One of the reset buttons. Signup and view all the answers

What is the initial step in the HUD activation process?

Press and hold the on/off button on the speaker module. Signup and view all the answers

What should be done after pushing the regulator release buttons?

Ensure that air flow has stopped. Signup and view all the answers

At what pressure should the control module pressure reading drop below to activate the flashing LED in the HUD?

1575 PSI Signup and view all the answers

What indicates that air pressure is critically low in the system?

A flashing red LED in HUD. Signup and view all the answers

What happens when the system pressure falls below 200 PSI?

The control module should be turned off. Signup and view all the answers

What is indicated by the buddy lights flashing red?

There is a low-pressure warning. Signup and view all the answers

Which step should be performed last in the process?

Stow SCBA. Signup and view all the answers

How many times should the reset button be pressed to turn off the control module at low pressure?

Twice within approximately one second. Signup and view all the answers

What is the purpose of slowly opening the bypass valve after removing the facepiece?

To vent remaining pressure in the system. Signup and view all the answers

What should you do immediately after allowing the control module to remain motionless for 20 seconds?

Listen for the repeated tones of the PASS pre-alarm. Signup and view all the answers

Which indication confirms that the PASS full alarm has activated?

The red LED is displayed in the HUD. Signup and view all the answers

How can you manually activate the PASS alarm?

Press and hold the alarm button. Signup and view all the answers

What is the correct procedure to reset the PASS alarm?

Press the right reset button twice within one second. Signup and view all the answers

What should you verify about the regulator during use?

It should not produce any unusual sounds. Signup and view all the answers

What action should you take before attaching the regulator to the facepiece?

Close the cylinder valve fully. Signup and view all the answers

When is it appropriate to inhale sharply during the procedure?

After attaching the regulator to the facepiece. Signup and view all the answers

What should you confirm about the LED on the speaker module at the end of the procedure?

It should be OFF. Signup and view all the answers

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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Description

This quiz focuses on the crucial safety procedures for checking the regulator and facepiece of respiratory equipment for negative pressure. You will learn the necessary steps to ensure your equipment is functioning correctly and provides a proper seal.