56 Questions
What should you do when the primary low pressure alarm rings?
Immediately return to fresh air
What is the correct sequence to disconnect the Push-To-Connect Regulator?
Grasp the regulator, push the release buttons, and pull regulator out
What should you do when the air mask free-flows?
Immediately return to fresh air
What is the minimum pressure required to shut down the SCBA?
200 psig
What should you do after removing the facepiece?
Fully loosen the harness straps in reverse order and pull the facepiece up and away
Where should regulators be stowed when not in use?
In the stand-by belt mount
What is the maximum working pressure of the SCBA?
4500psig
What should you do if the dust cover will not stay on the male fitting because air is leaking during transfilling in a contaminated atmosphere?
Immediately reconnect the Quick-Fill system hose to seal off the leak
What is the primary means of performing trans-fill operations?
From the RIT System
When should trans-filling be performed?
During life-threatening emergencies or simulated training exercises
What should the receiver do following the trans-fill procedure?
Return to fresh air immediately
What is the purpose of the dust cover on the male Quick-Fill system fitting?
To prevent dirt, water, and debris from entering the fitting, and acts as a redundant seal
What happens when the audible alarm begins ringing and HUD begins flashing?
The pressure in the cylinder has been reduced to 35% of its rated working pressure
What should the donor do if their audible alarm begins ringing or HUD/ICM Unit Gauge begins flashing during transfilling?
Disconnect and preserve his escape time
What is the minimum pressure required to transfill air to a receiver?
2000psig
What should you do after approximately 30-60 seconds of transfilling?
Disconnect the Quick-Fill system hose from the SCBA
What should be done to ensure the cylinder is securely held in the carrier?
Place one hand on the back plate and grasp the cylinder valve with the other to try to pull the cylinder and valve out.
What should be done if the cylinder shows evidence of exposure to high heat or flame?
Remove the cylinder from service.
What should be done before replacing a cylinder?
Be sure there is no pressure in the system.
What should be checked externally before recharging a cylinder?
Evidence of high heat exposure, corrosion, and the hydrostatic retest date.
What is the purpose of the pressure relief device?
To protect a fully charged cylinder from the effects of a fire.
What should be done after each use of the RIT system?
Perform a functional check of the RIT system only after each use.
What should be done when using the Quick-Fill system for transfilling operation?
Use only the transfilling hose assembly or fitting supplied by MSA specifically for the Quick-Fill system.
What is the recommended pressure to store the cylinder full?
At a pressure above ambient but less than 100psig.
What should be done if the cylinder feels loose after being secured in the carrier?
Re-check that the band and latch is in the proper slot and the lock tab is fully engaged.
What is the purpose of the Quick-Fill system?
To be used for rapid intervention teams for emergency filling operations in an IDLH.
What does an unusual sound, such as whistling or chattering, from the regulator indicate?
The regulator should be checked further
How often should SCBA units assigned to a station be inspected?
Weekly
What should you do if the warning device, Control Module, or HUD does not function properly?
Remove the SCBA from service and notify Logistics
What is the purpose of the Primary Low Pressure Warning Device?
To warn the user when the air pressure reaches a critical level
Who is responsible for ensuring that the inspection and records requirements are carried out within their station?
Station officer
What should you do if the air pressure in the bottle drops by 100psi in 10 seconds when the cylinder valve is turned off?
Remove the SCBA from service and notify Logistics
What should you check during a daily inspection of the facepiece?
The facepiece for proper seal and exhalation valve function
How often should SCBA units be inspected and flow tested by a certified MSA Level II trained repairperson?
Annually
What should you do if the primary low pressure warning device does not activate during a daily inspection?
Remove the SCBA from service and notify Logistics
What is the approximate pressure at which the primary low pressure warning device should start to ring and tone?
1575psig
What action should be taken if serious leakage is noticed from either of the two female fittings or anywhere along the hose?
Disconnect the female fitting and return to fresh air immediately
What is the purpose of the dust cover on the Quick-Fill system male fitting?
To provide a redundant seal and prevent dirt, water, and debris from entering the fitting
What is the recommended cleaning solution for the SCBA?
Confidence Plus Cleaning Solution from MSA or approved by Logistics
What should be done after cleaning the facepiece and components?
Rinse the facepiece and components in clean, warm water
Why should the cylinder be kept attached to the quick connect fitting?
To prevent water, dirt, or debris from entering the cylinder
What is the purpose of the functional test after each use and on Monday?
To ensure the SCBA is functioning properly
What should be done if the facepiece does not hold a negative pressure seal?
Return the facepiece to Logistics for repair
What should be done to inspect the entire apparatus after cleaning?
Inspect the entire apparatus as you reassemble it
What should be done if the regulator needs to be repaired?
Return the regulator to Logistics for repair
What is the purpose of the negative pressure test?
To ensure the regulator and facepiece can hold a negative pressure
Who is authorized to repair SCBA units?
Only individuals certified by the manufacturer
What should be done to SCBA units needing repair or adjustment?
Mark with a tag stating 'Danger - Do Not Use' and description of the problem
What is the purpose of in-line air purifying sorbent beds and filters in compressors?
To assure breathing air quality
What is required for oil-lubricated compressors?
Both a high temperature alarm and a carbon monoxide alarm
What type of compressor is used by the Department?
Breathing air compressor
What should be done with SCBA units turned in for repair?
Have them repaired, serviced, or adjusted by manufacturer-trained personnel
What is the standard for breathing air quality?
Grade D air
Who can tighten or reattach harness components?
Members of the fire rescue team
What is required for cylinders for breathing air?
Testing and maintenance as prescribed in the Shipping Container Specification Regulations
What is the purpose of record-keeping for respirators?
To track inspection dates and findings
Study Notes
Pre-Use Checks
- Before entering a hazardous atmosphere, perform tests on the unit to ensure it is ready for use.
- Check the mask to ensure it passes all tests.
Precautions during Use
- Periodically check the pressure indicated on the remote gauge.
- If air flow is reduced, immediately open the bypass and return to fresh air.
- If the air mask is not functioning properly, immediately return to fresh air.
- If the primary low pressure alarm rings or HUD lights and flashes, immediately return to fresh air.
Disconnecting the Push-To-Connect Regulator
- Grasp the regulator, push the release buttons, and pull the regulator out of the facepiece adapter.
- Close the cylinder valve fully, open the bypass slowly to release system pressure, and close the bypass.
- When the pressure falls below 200 psig, turn off the SCBA by pressing the reset button (green) 2 times in rapid succession.
Removing the Facepiece
- Fully loosen the harness straps in reverse order and pull the facepiece up and away from your face.
Changing the Cylinder
- Be careful not to drop the cylinder or bump the valve knob.
- Ensure there is no pressure in the system before replacing a cylinder.
- Disconnect the Quick Release coupling by turning the handwheel counterclockwise until it stops, and pull it away.
- Depress latch buttons and raise the latch to loosen the cylinder clamp.
- Remove the empty cylinder from the carrier, making sure to protect the quick connect fittings from damage, dirt, and debris.
- Slide a fully charged cylinder into the carrier, align the regulator retainer into the dovetail, with the gauge facing out.
- Close the latch mechanism until the buttons lock in position.
Safety Precautions for SCBA Cylinders
- Remove from service if the cylinder shows evidence of exposure to high heat or flame.
- Do not use the SCBA unless the cylinder is filled to the full pressure approved.
- Do not alter, modify, or substitute a component without approval of the manufacturer.
MSA G1 RIT System
- The G1 RIT system is an SCBA designed to be used by rapid intervention teams for emergency filling operations in an IDLH.
- The RIT system is stored in a red iron cloth skid bag and contains an MSA G1 first and second stage regulator assembly, low pressure warning device, 60-minute air cylinder, 6ft Quick fill hose, and facepiece.
Quick-Fill System
- The Quick-Fill system is not to be used as a ‘Buddy Breather” for simultaneous use by two users.
- For transfilling operations, only use the Quick-Fill system hose assembly and fittings supplied by MSA.
- Do not lubricate the Quick-Fill fitting, and ensure it is clean and undamaged.
Trans-filling Between SCBA and RIT System
- Trans-filling should be performed only during life-threatening emergencies or simulated training exercises.
- The primary means of performing trans-fill operations will be from the RIT System, which should be full at the time of trans-fill.
Cleaning and Disinfecting
- All SCBA/SAR units will be cleaned and disinfected after each use, at a minimum.
- Use the Confidence Plus Cleaning Solution from MSA or a cleaning solution approved by Logistics to clean all components of the breathing apparatus.
- Do not use any cleaning substance that can or might attack any part of the breathing apparatus.
Repair Procedure
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The standard requires that a program for maintenance and care of respirators will be developed, including inspection for defects, leak checks, and repair.
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Replacement or repairs will be done only by experienced persons with parts designed for the respirator.
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A record will be kept of inspection dates and findings for all respirators used for emergency use.### SCBA Inspection and Maintenance
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Unusual sounds from the regulator, such as whistling, chattering, clicking, or rattling, indicate the need for further inspection and potential removal from service.
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Symptoms requiring removal from service include failure of the Primary Low Pressure Warning Device, Control Module, or HUD.
HUD and Primary Low Pressure Warning Device
- To test the alarm, pressurize the system, open the bypass slowly, and watch the pressure gauge or primary screen.
- The alarm should start ringing and the HUD LED should flash at approximately 1575psig.
- The alarm should continue until the air pressure reaches approximately 200psig or less.
Primary Low Pressure Warning Device Inspection
- Check that the bell is securely attached and properly aligned.
- Inspect the UAC Assembly and relief valve for damage, dirt, or leaks.
- Ensure the cylinder valve is completely closed and the regulator outlet is unobstructed.
SCBA Unit Inspection and Maintenance
- Replace the second stage regulator in the standby belt mount when not attached to the facepiece.
- SCBA units assigned to a station must be inspected weekly, with records maintained in the Department computer database.
- Station officers are responsible for ensuring inspection and record requirements are carried out.
Annual Inspection and Flow Testing
- SCBA units must be inspected and flow tested annually by a certified MSA Level II trained repairperson.
- A written record of the test results will be maintained in Logistics.
Daily Inspections
- Daily inspections involve:
- Checking facepiece seal and exhalation valve function
- Ensuring HUD activation when the system is charged
- Inspecting the harness and bottle for noticeable damage
- Checking the secondary stage regulator's O-ring seatation
- Ensuring the bottle is full
- Listening for the Audi-Larm tone
- Visually inspecting the Control Module activation
- Comparing air readings in the bottle and Control Module
- Manually activating the integrated pass device
- Checking the second stage regulator for free flowing
- Opening the bypass valve to ensure proper function
- Turning off the bottle and monitoring the Control Module unit for pressure drop
Additional Inspection Steps
- Connect the regulator to the mask and activate the second stage regulator to ensure proper operation.
- Speak into the facepiece to test the speaker module.
- Breathe slowly and watch the Control Module gauge to observe the alarm activation point (approximately 1575psig).
Learn about the essential precautions to take when using a mask in a hazardous atmosphere, including regular tests and emergency procedures. Understand the importance of monitoring pressure and responding to alarms and warnings. Ensure your safety with this critical knowledge.
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