Embraer 190 - Fire Protection

The fire protection system is responsible for detecting and extinguishing fires in various areas of an aircraft. This includes the engines, auxiliary power unit (APU), cargo compartments, and lavatories. These areas are particularly susceptible to fires due to the presence of flammable materials, electrical systems, and heat sources. Therefore, it is crucial to have a fire protection system that can quickly detect and suppress fires in these critical areas to ensure the safety of the aircraft and its occupants.

The correct answer is "two" because it states that a total of two fire extinguisher bottles named A and B are installed in the airplane. This means that there are two bottles in total, which can be used to serve either one engine or both engines in case of a fire emergency.

The APU Fire Detection System is comprised of two detector loops.

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The Engine Fire Detection System is monitored by two detector loops. This means that there are two separate systems in place to detect any fire conditions in the engine. When a fire condition is detected, the signal from both detector loops goes to the MAU (Master Annunciator Unit), which then generates the associated EICAS (Engine Indicating and Crew Alerting System) messages and alarms to alert the crew of the fire situation. Having two detector loops increases the reliability and accuracy of the fire detection system.

When the temperature inside the waste container exceeds a certain limit, the system automatically discharges the extinguishing agent. This is done to prevent any potential fire or explosion that may occur due to the high temperature. By automatically discharging the extinguishing agent, the system can quickly suppress the fire and prevent any further damage or danger.

When the fire handle is pulled, it commands the closure of multiple shutoff valves. These valves include the engine fuel shutoff valve, the engine hydraulic shutoff valves, and the engine bleed air shutoff valve. Therefore, the correct answer is the engine fuel shutoff valve; the engine hydraulic shutoff valves and; the engine bleed air shutoff valve.

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When the APU EMER STOP pushbutton is pressed, it activates the APU fire extinguisher system. The APU fire extinguisher pushbutton then illuminates to indicate that the extinguisher bottle is armed and ready to be deployed in case of a fire emergency.

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The Cargo Fire Extinguishing System consists of one high-rate extinguisher bottle and one low-rate extinguisher bottle. This means that there is only one of each type of extinguisher bottle in the system.

The correct answer is center avionics bay. This is where both extinguisher bottles are installed and can be used in either the forward or aft cargo compartment.

When the APU EMER STOP pushbutton is pressed, the red strip bar is replaced by the white stripe bar. This change in color indicates that the APU has shut down.

Pressing the associated cargo compartment button after the annunciation of smoke detection in the cargo compartment will cause the high-rate fire-extinguishing bottle to discharge immediately into the selected cargo compartment. Additionally, the EICAS ADVISORY message "CRG FIREX HI DISCH" will be displayed.

When an APU fire is detected, the upper half of the button illuminates red. This indicates that there is a fire in the auxiliary power unit (APU). The color red is commonly associated with danger and fire, so it serves as a clear visual indicator for pilots and crew members to take immediate action and follow the appropriate emergency procedures to extinguish the fire and ensure the safety of the aircraft and its occupants.

Both cargo compartments are protected by the CARGO SMOKE DETECTION SYSTEM and CARGO FIRE PROTECTION SYSTEM. This means that both the forward and aft cargo compartments have systems in place to detect smoke and protect against fire.

The correct answer is "an independent" because it suggests that each cargo compartment has its own separate smoke detection system. This means that if there is a fire or smoke detected in one compartment, the system will only activate in that specific compartment, allowing for targeted response and minimizing the risk of false alarms or confusion in other compartments. Having an independent smoke detection system for each compartment improves safety and ensures efficient monitoring of potential fire hazards.

When an engine fire extinguishing bottle is discharged, it is possible for the fire handle illumination to be lost. However, if the CAS (Crew Alerting System) message indicating a fire is still active, it means that the fire condition is still present and persists. Therefore, the correct answer is that the fire condition persists.

If a fire condition is still present and the APU emergency stop button is not pressed, the APU fire extinguisher pushbutton illuminates after 1 minute indicating that the extinguisher bottle is armed.

If the fire detection test button is pressed for 10 seconds, the APU (Auxiliary Power Unit) will shutdown. This implies that pressing the fire detection test button for a longer duration of 30 seconds will not result in the APU shutting down.

The APU fire detection electrical power is supplied by the DC ESS BUSES.

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The Fire Extinguishing System consists of one fire-extinguisher bottle installed on each lavatory waste container. This suggests that there is only one fire-extinguisher bottle for each lavatory waste container, indicating that the system is designed to have one bottle per container.

The correct answer is HOT BATT BUS 1 and HOT BATT BUS 2. In the event of an engine fire, the electrical power to operate the fire extinguishing system is supplied by the HOT BATT BUS 1 and HOT BATT BUS 2. These buses provide power from the aircraft's battery to critical systems in emergency situations. The DC ESS BUSES may not be able to supply sufficient power for the fire extinguishing system, making them an incorrect option.

The low-rate fire-extinguishing bottle will not automatically discharge in case of a fire on the ground.

Pressing the associated pushbutton before the one-minute period immediately discharges the low-rate extinguishing bottle. This means that if the pushbutton is pressed within the first minute, the low-rate extinguishing bottle will be discharged right away.

The high-rate bottle can be armed by pushing the cargo fire extinguisher button, indicated by the red button light and associated EICAS message. If the button is pushed again within two minutes, the high-rate bottle will be discharged and the low-rate bottle will be armed. If the button is not pressed a second time within two minutes after arming, the system will reset.

The correct answer is 60 minutes. This means that after one minute, the second fire-extinguishing bottle discharges automatically at a reduced flow rate and the agent remains in the selected cargo compartment for 60 minutes.

The APU will automatically shut down 10 seconds after the fire condition is present. This is likely a safety measure to prevent further damage or spreading of the fire. It allows for a quick response to the fire and helps to minimize the potential risks and hazards associated with it.

When the APU FIRE EXTINGUISHER button is pressed, the system discharges the APU fire bottle, shuts down the APU through the APU FADEC, closes the APU fuel shutoff valve (SOV), and displays an EICAS ADVISORY message APU FIREX BTL DISCH. This is the correct answer because it accurately describes the sequence of actions that occur when the APU FIRE EXTINGUISHER button is pressed. The APU fire bottle is discharged to extinguish the fire, the APU is shut down to prevent further damage, the APU fuel shutoff valve is closed to stop the flow of fuel, and the EICAS ADVISORY message is displayed to alert the crew of the action taken.

When fire or smoke is detected in the aft cargo compartment, the system automatically commands several actions. The first action is to turn off the air circulation fan. This helps to prevent the spread of smoke and fire by cutting off the air supply. The second action is to close the forward cargo compartment ventilation outflow valve. This further restricts the airflow and helps contain the fire. Finally, the system arms the AFT fire extinguishing bottle. This prepares the fire extinguishing system to be activated if necessary.

The forward and aft cargo compartments on the E-JETS are classified as class C.

The Engine fire detection electrical power is supplied by the DC ESS BUSES.

The fire detection test button on the control panel allows for a manual test of the engine fire detection system, the APU fire detection system, and the cargo smoke detection system. This button does not provide a manual test for the lavatory smoke detection system.

The correct answer is DC ESS BUS 2. The APU fire extinguishing electrical power is supplied by the DC ESS BUS 2.