SCBA Manual Practice Test

These questions are part of the practice quiz. Start practicing

• Which reading on the SCBA cylinder gauge indicates a low air condition requiring air management?
• What are the typical audible alarms on an SCBA and what do they indicate?
• What is the role of the second-stage regulator or demand valve?
• What is the recommended action if a leak persists after attempting to reseat and tighten the mask during a seal check?
• What is the total weight of the pack including the bottle?
• How does facial hair influence SCBA facepiece sealing, and what is the recommended policy?
• Who is authorized to refill or recharge SCBA cylinders?
• Identify two common failure modes of SCBA regulators.
• During the overhaul stage of firefighting, materials containing PVC will give off which gas, exposing those without respiratory protection to it?
• Which of the following best describes what the facepiece lens inspection assesses?
• How many cubic feet of air does one SCBA bottle hold?
• What documentation is typically completed after SCBA use?
• CO2 100,000 to 200,000 ppm (10% to 20%) may cause death within a few minutes due to paralysis of which center in the brain?
• Which of the following is NOT a major component of a typical open-circuit SCBA?
• Which value is used as the baseline breathing rate in LPM for the 45-minute rating?
• If 33% of the tank remains equals 1800 psi, what is the full tank pressure?
• If two bottles are trans filling, what will both pressures be once completed?
• The incomplete combustion of material from living things such as wool, rubber, and hair yields which gas with a rotten egg odor?
• What is the purpose of the PASS device and when should it be tested?
• What are the major components of a typical open-circuit SCBA?
• What constitutes a proper tag-out procedure for SCBA maintenance?
• Which statement best describes the common regulator failure modes?
• What is the proper doffing sequence for an SCBA to minimize contamination exposure?
• What is the maximum water temperature allowed to clean the facepiece?
• How should SCBA hoses and fittings be stored to prevent damage?
• What is the correct sequence for donning an SCBA and securing the harness?
• What percentage of fire casualties succumb to the toxic effects of fire gases before ever being touched by flame?
• Which sequence correctly describes the order of actions to control a regulator free-flow in the field?
• What are two critical checks you should perform on the facepiece exhalation valve during PUI?
• Which colorless gas is produced by the combustion of chlorine-containing materials such as PVC?
• When should you change a cylinder?
• Before using an SCBA cylinder, which checks are required during pre-use inspection?
• How long does it take for two bottles to completely transfill when one is empty and one is full?
• One green light on the HUD indicates which pressure condition?
• Under uncertain conditions where the SCBA cannot provide safe air, when should the unit be removed from service?
• What effect can extreme heat have on SCBA components?
• Which colorless gas is produced when refrigerants, such as Freon, encounter flame, with a musty hay odor indicating its presence?
• What is the purpose of a seal check?
• The maximum regulator flow rate measurement is expressed in which unit?
• Phosgene is chemically represented by which formula?
• How can you extend the service life of the SCBA by proper storage?
• How should you read the SCBA cylinder pressure gauge and what constitutes a 'low' reading?
• At what remaining air percentage does the Low Air Whistle activate in the RIT pack?
• Explain the role of a bailout cylinder in SCBA operations.
• If the purge valve is open, what is the maximum flow rate that can be sent through the regulator?
• If a regulator or any SCBA component fails during a mission, what is the standard action?
• Which substance should be avoided when cleaning SCBA components due to potential material degradation?
• What is the recommended action if you discover damage to the regulator's inlet fitting?
• What steps should be taken if you experience heat-related illness during SCBA use?
• What storage conditions help extend SCBA life?
• What is the weight of the pack including the bottle?
• Which item is not listed as part of the RIT pack contents?
• What is the role of the buddy system in SCBA use in hazardous environments?
• The low air whistle in the RIT pack activates at which remaining air percentage?
• How often must a cylinder undergo hydrostatic testing?
• What steps should be taken when a regulator shows signs of damage or poor performance?
• What is standard atmospheric pressure in psi?
• Which gas is colorless, odorless, nonflammable, produced by combustion, and is familiar to firefighters as an inert extinguishing agent in hand portable extinguishers?
• What should you do if you need to switch between air cylinders while in a hazardous zone?
• Which gas is associated with a rotten egg odor and tends to accumulate in low-lying areas due to being heavier than air?
• Why is it important to log SCBA usage and air consumption after each incident?
• How should fuel or oil contamination be prevented from entering the SCBA system?
• Describe the differences between open-circuit and closed-circuit SCBA.
• What should you inspect on the facepiece lens during PUI?
• After decontamination, which step is essential to prevent damage to sensitive components?
• Which gas is colorless, odorless, and used as an inert extinguishing agent in portable extinguishers?
• After rough handling, how should you validate facepiece seal remains effective?
• Which value corresponds to the baseline breathing rate in LPM used for the 45-minute rating?
• Which item is included in the RIT pack contents that is used for remote pressure monitoring?
• At what concentration of carbon monoxide does unconsciousness occur immediately upon exposure, with death following in one to three minutes?
• How do you verify the regulator is delivering air properly after donning?
• Firefighters should not enter atmospheres with temperatures exceeding how many degrees Fahrenheit without full protective gear and respiratory protection?
• Which statement correctly describes the role of the pressure reducers?
• Which method is recommended to manage fogging of the facepiece in smoky environments?
• The red light on the HUD indicates which pressure?
• In hazardous atmospheres described as IDLH or unknown, why is an SCBA suitable?
• If the bottle weighs 14 lbs and the pack including bottle weighs 30 lbs, what is the weight of the pack without the bottle?
• How should empty SCBA cylinders be stored during transport?
• When carbon dioxide concentration is about 5000 ppm, what symptoms are observed?
• Which gas is produced by the incomplete combustion of nitrogen-containing materials such as wool and nylon and has a bitter almond odor?
• In a configuration with a bailout cylinder, what is the primary purpose?
• Under what condition should you switch to a backup air source?
• Acceptable low oxygen as defined by OSHA exists between ___% -___%.
• What does the hydrostatic test date on a cylinder indicate?
• What is the appropriate response if a regulator emits a whistling or hissing sound?
• Which integrated device is commonly included with SCBA systems?
• Which action is most appropriate when regulator moisture is detected during operation?
• What cleaning procedure is recommended after use in a hazardous environment?
• Which practice protects elastomer components during cleaning of the SCBA exterior?
• How often should cylinders be replaced?
• The bottle's weight in pounds is what?
• Which describes the function of an SCBA in the air delivery path?
• Why should a detected facepiece leak be addressed immediately?
• Why are periodic calibration and testing of SCBA equipment important?
• Which gas, when inhaled, can burn mucous membranes due to moisture forming hydrochloric acid on contact with tissues?
• Why is ongoing SCBA training essential for responders?
• During donning, which step is not part of the proper sequence?
• The bottle's weight is closest to which value in pounds?
• During post-use SCBA maintenance, which action is performed just after reassembling the unit?
• What does an End of Service Time Indicator (ESTI) signify, and what is the recommended action?
• For how many seconds does the Pak-Alert monitor for zero air pressure before turning off?
• During shift change, which items should be checked for SCBA inventory?
• What is the normal atmospheric concentration of carbon dioxide in ppm and percent?
• Department standards dictate that the SCBA will be utilized when the concentration of carbon monoxide exceeds how many ppm?
• Maintenance logs collected after SCBA use typically document which information?
• What is the general rule about oil and SCBA components?
• What percentage of fire casualties die due to inhalation of toxic gases before flames reach them?
• Which description best captures the air delivery path from the SCBA system to the wearer?
• How can you minimize regulator freezing or icing in cold weather?
• When determining wear on hoses or gloves, what should you do?
• During an incident, what is the expected action after recognizing a heat-related illness during SCBA use?
• Maintenance records should include which items for each SCBA unit?
• What is the general role of the buddy system with SCBA during operations?
• What condition prompts the user to plan a transition out of the hazard area?
• Which device is specifically associated with the regulator in the context of this equipment set at 145-165 psig?
• Which component delivers air to the wearer after it leaves the cylinder in an open-circuit SCBA?
• An oxygen concentration less than _% will cause convulsions, cessation of breathing, and cardiac arrest.
• What is the recommended approach to air management when entering a structure?
• What substances are formed when products containing carbon and chlorine burn, especially plastics, pesticides, herbicides, or other products where chlorine is used in the manufacturing process?
• If the bottle weighs 14 lbs and the pack weighs 30 lbs including the bottle, what is the weight of the pack excluding the bottle?
• What should be included in a post-use decontamination protocol for SCBA used in a contaminated environment?
• Why is it important to keep the SCBA away from hydrocarbons?
• What does the term 'away' refer to in the valve-handling description?
• Which of the following is a typical corrective action for a regulator experiencing free flow?
• What does tagging out SCBA equipment for repair signify?
• What is the baseline breathing rate used by NIOSH for a 45-minute bottle rating?
• What is the role of the first-stage regulator in an SCBA system?
• During a pre-use check for an SCBA, which items should be verified?
• What is a primary hazard of hydrocarbons with respect to SCBA components?
• The bottle weighs how many pounds?
• Which NFPA standard governs personal alert safety systems (PASS)?
• What is the function of the PASS device and how is it used during operations?
• What is the maximum distance a pack tracker can locate a pack?
• Which of the following is a major component of a typical open-circuit SCBA?
• What is the primary purpose of an SCBA in hazardous atmospheres?
• The baseline breathing rate used for the 45-minute bottle rating is what value?
• Which device checks for zero air pressure and will turn off when pressure is discharged?
• Oil or fuel contact with SCBA components can lead to which of the following outcomes?
• What action is recommended as the primary step if you lose air in an IDLH environment?
• What is the best description of the EOSI's role in crew safety?
• What is a pre-use inspection (PUI) and why is it required?
• How is the end-of-service-time indicator (EOSI) or low-air alarm typically triggered?
• Which sequence is correct for cleaning an SCBA mask after contamination?
• The pressure inside the facemask is approximately in what range above atmospheric pressure?
• What action should be taken if the regulator inlet is damaged?
• Hydrostatic testing for cylinders is due every how many years?
• What are best practices for storing SCBA cylinders when not in use?
• How many holes are in the spray bar?
• Which activity is performed just before logging maintenance in post-use SCBA maintenance?
• Which of the following is a recommended post-use decontamination action after using SCBA in a contaminated environment?
• 35 ppm is equivalent to approximately what percent?
• How does an SCBA differ from other respirators in terms of air supply and use in hazardous atmospheres?
• Which gas, when combined with moisture, forms hydrochloric acid that can burn and blister the mucous membranes of the nose, the linings of the lungs, and the tissue of the mouth and throat?
• Describe a standard positive-pressure facepiece seal check.
• Which symptoms indicate potential oxygen deficiency while wearing an SCBA?
• How should you check the cylinder's remaining air before entry?
• What is the recommended practice regarding battery life for PASS devices?
• Which item is NOT a mask or facepiece inspection item?
• Which gas has a bitter almond odor and is produced by incomplete combustion of nitrogen-containing materials?
• How do you determine whether hoses or gloves require replacement due to wear?
• What should be included in a pre-entry go/no-go checklist for SCBA use?
• Which statement about the effect of extreme heat on SCBA components is true?
• What is the upper bound of OSHA's acceptable low-oxygen range?
• What is a key purpose of the tag-out record in SCBA maintenance?
• Under what circumstances should an SCBA be removed from service?
• What should you inspect on the cylinder for serviceability?
• Dioxins are strongly suspected of contributing to pathology in which systems, and depending on ambient temperature can be adsorbed to smoke particles or remain in a vapor phase?
• Given the pack weighs 30 lbs including the bottle, what is the weight of the pack without the bottle?
• Which unit is used to express the air content in a bottle?
• What is the pressure within the facemask relative to atmospheric pressure?
• Which organization provides guidelines that influence hydrostatic testing frequency for SCBA cylinders?
• How many pounds does the pack weigh when including the bottle?
• How often are SCBA cylinders typically hydrostatically tested and why?
• How do a fit test and a seal check differ for respirators?
• Name two facepiece seal checks used before entering a hazardous area.
• How do you perform a positive-pressure seal check on the facepiece?
• At what signal strength percentage does the tracker emit a sound?
• When the air pressure in the low cylinder drops below a certain threshold, the system automatically switches to the higher cylinder. What is that threshold?
• Dioxins are formed when products containing carbon and chlorine burn.
• Which of the following gases is listed as part of the primary toxic gases responsible for death by inhalation in fires?
• What is the primary purpose of an SCBA in firefighting?
• Which gas decomposes into hydrochloric acid upon contact with water, causing damage to the lungs and bronchial tubes of unprotected firefighters?
• What is the purpose of a secondary regulator in some SCBA configurations?
• Which gas is heavier than air and has a rotten egg odor, produced by incomplete combustion of organic materials?
• In the described valve-handling method, what does 'high' mean?
• Which of the following is NOT listed among the primary toxic gases?
• Which items are verified during pre-use inspection to ensure cylinder readiness?
• Dioxins are strongly suspected of contributing to pathology in which body systems?
• Which practices help prevent hose entanglement during rapid egress with SCBA?
• What is the primary benefit of a secondary regulator in some SCBA configurations?
• If you suspect the regulator is stuck causing blocked airflow, what is the appropriate immediate action?
• What should you do after a contaminated operation before storing the SCBA?
• Which storage practice helps extend SCBA life?
• The Secondary Pressure Reducer sends air to the regulator for Vibralert within which pressure range?
• What is the role of the EOSI in a SCBA system?
• What impact does a facepiece leak have if not addressed promptly?
• Which component connects the cylinder and regulators to the facepiece and delivers air at low pressure?
• CO at concentrations of which values is extremely lethal, causing unconsciousness after 30 minutes?
• How often is hydrostatic testing typically required for SCBA cylinders?
• Which items should be included in a pre-use SCBA inspection?
• What is the maximum number of packs a tracker can handle?
• What is the purpose of a low-air audible/visual alarm on an SCBA?
• What should you verify about the cylinder valve during a PUI?
• How do you manage air supply when performing two-entry operations with one SCBA?
• How should SCBA load be managed to maintain mobility during operations?
• Which organization provides widely recognized standards for SCBA performance and care?
• What is the proper post-decontamination step before storing the SCBA?
• If an SCBA regulator free-flows in the field, what is the correct sequence of actions?
• What is the weight of the bottle in pounds?
• What effect does high heat exposure have on SCBA safety margins during a fire?
• Which item is NOT part of the recommended shift-change checks for SCBA inventory?
• After cleaning an SCBA mask, what step is necessary before reuse?
• What is the correct sequence to don an SCBA to ensure a proper seal?
• Which statement about the tracker’s ability to locate a pack is true?
• Normal fresh air exists at ___% oxygen concentration in the atmosphere?
• What is the pressure corresponding to 33% of the tank?
• O2 concentration of _%-__% in the air will cause nausea, vomiting, lethargy, ultimately leading to unconsciousness.
• What are the key steps in post-use SCBA maintenance?
• What are visual indicators that a facepiece seal is effective during a seal check?
• What action should you take if the cylinder is overdue for hydrostatic testing?
• The yellow light on the HUD indicates which pressure?
• How should you respond if your SCBA fails to deliver air during an escape route?
• The pack's total weight including the bottle is how many pounds?
• Which statement correctly describes open-circuit SCBA?
• What should you do if the facepiece fogs during use inside a smoky environment?
• The Primary Pressure Reducer sends air to the regulator for normal respirations within which range?
• Which mask and facepiece inspection items ensure visual clarity and structural integrity?
• Which statement about PUI is true?
• Which items are included in the RIT pack contents?
• What are the general guidelines for cleaning the SCBA exterior after operation?
• What is a common cause of SCBA malfunctions during an operation?
• What is the purpose of the SCBA low-air alarm, and what should you do when it activates?
• Why is it important to understand whether your SCBA has a primary and backup air supply?
• What is a typical action if a regulator experiences 'regulator freeze' during use?
• Describe a standard negative-pressure facepiece seal check.
• Which hazard results from oil exposure to elastomer components in SCBA?