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Bahrain CAA Cabin Crew study materials
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Bahrain CAA Cabin Crew practice questions

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Question 1Aviation Safety and Emergency Procedures

On a pressurized aircraft, the cabin altitude warning (horn or aural alert) typically activates when cabin altitude exceeds which threshold?

  1. Approximately 18,000 feet
  2. Approximately 10,000 feet Correct answer.
  3. Approximately 14,000 feet
  4. Approximately 5,000 feet

Explanation

Cabin altitude warnings are designed to alert crew before hypoxia becomes significant, and the standard trigger point is around 10,000 feet cabin altitude. At this height the body begins to experience reduced oxygen saturation in susceptible individuals, so the crew must act promptly.

Question 2Aviation Safety and Emergency Procedures

During a rapid decompression at high altitude, what is the first action cabin crew should take?

  1. Open the nearest emergency exit to equalize pressure
  2. Don oxygen masks and secure themselves before assisting others Correct answer.
  3. Immediately begin walking the cabin to check passengers
  4. Collect passenger oxygen masks for redistribution

Explanation

Crew must protect themselves first, because an incapacitated crew member cannot assist anyone. Donning oxygen and securing a hold before assisting others is the universal principle in decompression response.

Question 3Aviation Safety and Emergency Procedures

What is the primary purpose of a brace position during an emergency landing?

  1. To allow passengers to exit more quickly after impact
  2. To protect the passenger's cabin baggage
  3. To keep the seat belt visible to cabin crew
  4. To reduce flailing and limit injury from secondary impacts Correct answer.

Explanation

The brace position minimizes body movement during deceleration, reducing flailing injuries and secondary impacts against seat structures. It also helps keep the head and limbs in a safer alignment relative to the seat.

Question 4Aviation Safety and Emergency Procedures

Which extinguishing agent is most appropriate for a fire involving energized electrical equipment in the cabin?

  1. Halon or a clean agent suitable for electrical fires Correct answer.
  2. Foam from a portable extinguisher
  3. Water from the galley sink
  4. A wet blanket

Explanation

Electrical fires require a non-conductive agent, and halon or modern clean agents extinguish without conducting electricity. Water and foam can conduct current and risk shock or equipment damage.

Question 5Aviation Safety and Emergency Procedures

During an emergency evacuation, the command "BRACE, BRACE" is given to passengers primarily at which moment?

  1. When the cabin crew begin the evacuation checklist
  2. At the start of the flight, during the safety demonstration
  3. Only after the aircraft has come to a complete stop
  4. Just before impact, when the impact is imminent Correct answer.

Explanation

The brace command is given when impact is imminent so passengers adopt the protective posture before deceleration forces act. Timing it too early or too late reduces its protective value.

Question 6Aviation Safety and Emergency Procedures

What does the term "sterile cockpit" mean for cabin crew during critical phases of flight?

  1. Only the captain may speak on the interphone
  2. Cabin crew must remain seated with harnesses fastened
  3. All cabin lights must be switched off
  4. Non-essential conversation and activity are avoided Correct answer.

Explanation

Sterile cockpit rules require that non-essential conversation and activity be avoided during critical phases such as taxi, takeoff, and landing. This keeps attention focused on safety duties and communications.

Question 7Aviation Safety and Emergency Procedures

Which of the following best describes the purpose of the pre-flight safety demonstration?

  1. To satisfy a marketing requirement for the airline
  2. To inform passengers of safety equipment and required actions Correct answer.
  3. To replace the individual passenger safety briefing
  4. To identify which passengers are frequent flyers

Explanation

The demonstration conveys essential information about exits, oxygen, life jackets, and brace positions so passengers know what to do in an emergency. It is a regulatory safety requirement, not a commercial activity.

Question 8Aviation Safety and Emergency Procedures

A passenger is seated in an exit row but appears unable to understand the crew's instructions. What should the crew do?

  1. Give the passenger a written card and continue
  2. Reseat the passenger to a non-exit-row seat Correct answer.
  3. Allow the passenger to remain but assign a companion to assist
  4. Ask the passenger to watch the safety demonstration carefully

Explanation

Exit-row occupants must be capable of understanding and performing exit duties, so a passenger who cannot understand instructions must be reseated. This preserves the exit's usability in an emergency.

Question 9Aviation Safety and Emergency Procedures

What is the standard method for a cabin crew member to indicate an evacuation is required to the flight deck?

  1. Activate the passenger call button repeatedly
  2. Use the interphone and state the nature of the emergency Correct answer.
  3. Pull the emergency exit handle
  4. Flash the cabin lights three times

Explanation

Crew communicate an evacuation need to the flight deck using the interphone, stating the nature of the emergency so the pilots can make an informed decision. Physical exit operation is not a signaling method.

Question 10Aviation Safety and Emergency Procedures

During a decompression, why should cabin crew avoid holding their breath?

  1. Expanding air in the lungs could cause injury during rapid pressure loss Correct answer.
  2. It prevents the oxygen mask from sealing
  3. It triggers the cabin altitude warning
  4. Holding breath reduces oxygen flow to the brain

Explanation

During rapid decompression, trapped air expands; holding the breath can over-pressurize the lungs and cause barotrauma. Crew should breathe normally or use the mask to avoid lung injury.

Question 11Aviation Safety and Emergency Procedures

A fire is discovered in a lavatory waste bin. What is the most appropriate initial action?

  1. Close the door, discharge the appropriate extinguisher, and monitor Correct answer.
  2. Open the door fully and fan the flames with a blanket
  3. Leave the door open and continue with other duties
  4. Wait for the fire to burn out before acting

Explanation

Closing the door limits oxygen and smoke spread, while the extinguisher attacks the fire and monitoring confirms it is out. Lavatory fires are commonly caused by discarded smoking materials.

Question 12Aviation Safety and Emergency Procedures

Why are cabin crew instructed to secure the galley before takeoff and landing?

  1. It prevents passengers from entering the galley
  2. It reduces the weight of the aircraft
  3. It keeps the galley lights on
  4. Loose items can become projectiles during sudden deceleration Correct answer.

Explanation

During abrupt deceleration, unsecured items can fly forward and cause injury, so galleys must be secured. This is a key part of landing and takeoff preparation.

Question 13Aviation Safety and Emergency Procedures

What is the correct order of actions when smoke is detected in the cabin during flight?

  1. Identify the source, use the extinguisher, then notify the flight deck Correct answer.
  2. Open all passenger windows to ventilate
  3. Notify the flight deck, ignore the smoke, and continue service
  4. Increase cabin temperature to burn off the smoke

Explanation

Crew first locate the source, apply the appropriate extinguisher, and then inform the flight deck so the pilots can plan for a diversion or other action. Identifying the source guides the right extinguishing agent and response.

Question 14Aviation Safety and Emergency Procedures

Why does cabin crew check that passengers' seat belts are fastened over the blanket during takeoff and landing?

  1. So the belt can be checked quickly and remains effective Correct answer.
  2. To make the belt easier to adjust in flight
  3. To keep passengers warm during the flight
  4. To prevent passengers from reading

Explanation

Fastening the belt over the blanket allows a quick visual check and ensures the belt remains effective if the passenger is covered. It supports rapid verification during critical phases.

Question 15Aviation Safety and Emergency Procedures

What is the primary hazard of a lithium battery fire in the cabin?

  1. It can reignite and requires sustained cooling Correct answer.
  2. It produces no smoke
  3. It is extinguished instantly by water
  4. It is only a risk during boarding

Explanation

Lithium battery fires can reignite after initial extinguishing, so sustained cooling with water or a suitable agent is required. Crew should monitor the device after the fire appears out.

Question 16Aviation Safety and Emergency Procedures

What is the function of the emergency locator transmitter (ELT) after an accident?

  1. It provides oxygen to the cockpit
  2. It transmits a distress signal to aid search and rescue Correct answer.
  3. It records cabin crew conversations
  4. It deploys the escape slides

Explanation

The ELT transmits a distress signal on a dedicated frequency so search and rescue can locate the aircraft. It activates automatically on impact or manually by crew.

Question 17Aviation Safety and Emergency Procedures

A passenger becomes disruptive and refuses to comply with safety instructions. What is the crew's priority?

  1. Maintain safety and seek support from the flight deck and other crew Correct answer.
  2. Physically restrain the passenger immediately without consultation
  3. Ignore the behavior to avoid escalation
  4. Ask other passengers to remove the person

Explanation

Crew should maintain safety, document the behavior, and coordinate with the flight deck and colleagues before escalating. Consultation ensures the response is proportionate and consistent with procedures.

Question 18Aviation Safety and Emergency Procedures

What is the purpose of a crew member's 30-second review before takeoff and landing?

  1. To count the number of passengers on board
  2. To check the passenger manifest for names
  3. To mentally rehearse the emergency actions for their position Correct answer.
  4. To confirm the catering order

Explanation

The silent review is a mental rehearsal of emergency duties, exit locations, and commands for the crew member's station. It prepares crew to act quickly if an emergency occurs during the critical phase.

Question 19Aviation Safety and Emergency Procedures

During an evacuation, why should crew shout commands continuously and loudly?

  1. To overcome noise and confusion and direct passengers to usable exits Correct answer.
  2. To test the public address system
  3. To warn the flight deck of turbulence
  4. To keep the cabin lights on

Explanation

Continuous, loud commands help passengers overcome the confusion and noise of an emergency and direct them toward usable exits. Clear commands reduce hesitation and improve evacuation flow.

Question 20Aviation Safety and Emergency Procedures

Why is it important to brief passengers about the location of the nearest exit relative to their seat?

  1. Because the exit nearest the seat is always the one used
  2. Because it allows crew to assign seats
  3. Because smoke may obscure the cabin and passengers may need an alternate exit Correct answer.
  4. Because passengers must choose an exit before boarding

Explanation

Smoke and darkness can obscure the cabin, so passengers must know how many rows they are from an exit to find one by touch. This improves the chance of a successful evacuation when visibility is poor.

Question 21Aviation Safety and Emergency Procedures

A crew member discovers that a slide has failed to inflate during an evacuation. What is the correct action?

  1. Push passengers down the slide anyway
  2. Instruct passengers to jump from the sill without guidance
  3. Leave the exit unattended and continue elsewhere
  4. Direct passengers to another usable exit and report the failure Correct answer.

Explanation

An uninflated slide is unsafe, so crew must redirect passengers to another usable exit and report the failure. The exit should be blocked or guarded to prevent use.

Question 22Aviation Safety and Emergency Procedures

Why must cabin crew be aware of the aircraft's decompression and rapid depressurization effects on the ears and sinuses?

  1. Trapped gas expansion can cause pain and injury requiring equalization Correct answer.
  2. It alters the cabin lighting
  3. It affects the aircraft's fuel consumption
  4. It changes the aircraft's weight and balance

Explanation

Rapid pressure changes cause trapped gas in ears and sinuses to expand, producing pain and possible injury, so equalization techniques are needed. Crew should also be alert to passengers with colds or sinus congestion.

Question 23Aviation Safety and Emergency Procedures

What is the reason crew should not use the public address system for evacuation commands if it has failed?

  1. Voice commands and whistle signals can still direct passengers effectively Correct answer.
  2. The PA system is required by law for all commands
  3. Evacuation is impossible without the PA
  4. Passengers cannot hear voice commands

Explanation

If the PA fails, crew must rely on loud voice commands and whistle signals to direct passengers, which are effective in the confined cabin. Evacuation can still proceed without the PA system.

Question 24Aviation Safety and Emergency Procedures

During an emergency landing, why should cabin crew check that passengers have removed sharp objects and eyeglasses?

  1. To speed up the boarding process
  2. To reduce injury from impact and debris Correct answer.
  3. To make the cabin look tidy
  4. To comply with customs regulations

Explanation

Sharp objects and eyeglasses can cause injury during impact or evacuation, so passengers are asked to remove and stow them. This reduces the risk of cuts and eye injury.

Question 25Aviation Safety and Emergency Procedures

Which brace position should an adult passenger adopt when seated and facing forward during an emergency landing?

  1. Turn sideways with the head resting on the shoulder of the adjacent seat
  2. Sit upright with hands gripping the armrests and legs extended
  3. Bend forward with head against the seat in front, hands placed on top of the head Correct answer.
  4. Lean back fully with arms crossed over the chest

Explanation

The forward-facing brace position reduces injury by tethering the body to the seat and lowering the head below the level of the seatback in front. The torso is bent forward, the head is pressed against the surface ahead, and the hands protect the head. This limits flailing and secondary impact during rapid deceleration.

Question 26Aviation Safety and Emergency Procedures

What is the purpose of a cabin crew member conducting a systematic cabin sweep during the approach-to-land phase?

  1. To distribute landing cards to arriving passengers
  2. To confirm that the cabin is secure and passengers are prepared for landing Correct answer.
  3. To collect passenger feedback forms for the airline
  4. To sell duty-free goods before the seat belt sign is switched on

Explanation

The pre-landing cabin check confirms that seat belts are fastened, tray tables are stowed, seatbacks are upright, and loose items are secured. It also confirms that galleys and exits are clear and that any special-needs passengers are briefed. This reduces injury risk in the event of a hard landing or evacuation.

Question 27Aviation Safety and Emergency Procedures

When a crew member gives the command to evacuate, which word should be used to prevent confusion with other shouted commands?

  1. Evacuate Correct answer.
  2. Hurry
  3. Move
  4. Exit

Explanation

The word 'evacuate' is internationally recognised and unambiguous, so it is used to initiate an evacuation. Shouted commands should be short, standardised, and repeated so passengers can understand them over noise. Using a single clear word prevents hesitation and misunderstanding.

Question 28Aviation Safety and Emergency Procedures

Why should cabin crew check that passengers' seat belts are fastened over the blanket rather than underneath it during takeoff and landing?

  1. So passengers can release the belt faster during an evacuation
  2. Because blankets can interfere with the seat belt buckle mechanism
  3. Because belts worn under blankets may not lock correctly in turbulence
  4. So the belt is visible and can be checked quickly by crew during the safety sweep Correct answer.

Explanation

A seat belt fastened over a blanket remains visible, allowing crew to confirm compliance quickly during the pre-takeoff and pre-landing sweep. A hidden belt cannot be verified, and the passenger may be incorrectly assumed to be secured. Visibility supports rapid compliance checks without disturbing passengers.

Question 29Aviation Safety and Emergency Procedures

What is the primary purpose of the passenger safety briefing card located in each seat pocket?

  1. To provide written, illustrated safety information specific to the aircraft type Correct answer.
  2. To record passenger details for immigration authorities
  3. To list the duty-free items available during the flight
  4. To advertise the airline's loyalty programme and onboard services

Explanation

The safety card provides written and illustrated instructions specific to the aircraft type, such as exit locations, brace positions, and life vest use. It supplements the oral briefing and supports passengers who prefer to read or who board after the demonstration. Crew should ensure cards are present and in the correct seat pocket.

Question 30Aviation Safety and Emergency Procedures

A cabin crew member notices a passenger's life vest is inflated inside the cabin before the aircraft has left the gate. What is the most appropriate action?

  1. Allow the passenger to keep it inflated because the flight has not yet departed
  2. Instruct the passenger to move to an exit row seat
  3. Remove the vest and replace it with a spare without comment
  4. Deflate the vest and remind the passenger it must only be inflated after exiting the aircraft Correct answer.

Explanation

A life vest inflated inside the cabin becomes a hazard because it restricts movement and can block aisles and exits. It must only be inflated after leaving the aircraft, so crew should deflate it and explain the correct procedure. The passenger should also be reminded to follow crew instructions.

Question 31Aviation Safety and Emergency Procedures

During a rapid decompression, what is the correct action for a cabin crew member who is seated and cannot reach an oxygen mask immediately?

  1. Hold the breath and keep the mouth closed until the mask can be reached
  2. Remove the seat belt and assist passengers before securing oxygen
  3. Stand up and walk to the nearest galley to retrieve a portable oxygen bottle
  4. Hold onto the nearest secure point, breathe normally, and stay seated until the aircraft reaches a safe altitude Correct answer.

Explanation

If a mask cannot be reached, the crew member should secure themselves, breathe normally, and remain seated until the aircraft descends to a safe altitude. Holding the breath can cause lung injury during rapid decompression. Moving around the cabin before oxygen is secured increases the risk of hypoxia and injury.

Question 32Aviation Safety and Emergency Procedures

A passenger seated in an exit row has a leg cast that restricts movement. What should the crew do?

  1. Allow the passenger to remain if they confirm they can operate the exit
  2. Assign another passenger to operate the exit on their behalf
  3. Ask the passenger to remove the cast before departure
  4. Relocate the passenger to a non-exit seat and reassign the exit-row seat Correct answer.

Explanation

Exit-row passengers must be physically able to open the exit and assist others without impediment. A leg cast that restricts movement makes the passenger unsuitable for the exit row, so they should be relocated. The exit-row seat must then be reassigned to an eligible passenger.

Question 33Aviation Safety and Emergency Procedures

After an emergency landing, a crew member at a floor-level exit finds the door jammed and cannot open it. What is the correct action?

  1. Leave the exit unattended and assist at another door
  2. Force the door open with a crash axe regardless of damage
  3. Redirect passengers to another usable exit and continue commanding the evacuation Correct answer.
  4. Instruct passengers to wait at the jammed exit until it is repaired

Explanation

If an exit cannot be opened, the crew member must redirect passengers to an available exit and keep the evacuation moving. Passengers must not be left waiting at a blocked exit because this delays evacuation. The crew member should continue shouting commands and assessing the situation.

Question 34Aviation Safety and Emergency Procedures

What is the correct procedure for a crew member who discovers a fire in an overhead bin during flight?

  1. Wait for the fire to burn out before taking any action
  2. Identify the source, discharge the appropriate extinguisher, and keep the bin closed until the fire is confirmed out Correct answer.
  3. Open the bin fully to inspect the contents before using any extinguisher
  4. Spray water into the bin and continue with normal cabin service

Explanation

The crew member should identify the fire source, use the correct extinguisher, and keep the bin closed to limit oxygen supply and contain the fire. Opening the bin fully can feed the fire and expose the cabin to flames and smoke. The bin should only be reopened once the fire is confirmed extinguished.

Question 35Aviation Safety and Emergency Procedures

A passenger reports feeling unwell and becomes unresponsive during cruise. What is the crew's first priority?

  1. Assess the passenger's condition and request medical assistance while following the airline's medical emergency procedure Correct answer.
  2. Ask other passengers to diagnose the condition
  3. Continue the cabin service and check on the passenger later
  4. Move the passenger to the galley without assessing them

Explanation

The crew's first priority is to assess the passenger and initiate the airline's medical emergency procedure, which may include requesting a doctor on board and contacting ground medical support. Early assessment guides decisions such as oxygen, first aid, and possible diversion. Delaying assessment can worsen the outcome.

Question 36Aviation Safety and Emergency Procedures

Why should cabin crew avoid using a public address system that has failed during an evacuation?

  1. Using the system would delay the crew's own escape from the aircraft
  2. The public address system may transmit incorrect information to the flight deck
  3. The crew must use direct, loud verbal commands that passengers can hear and respond to immediately Correct answer.
  4. The system cannot be heard over engine noise during an evacuation

Explanation

During an evacuation, crew rely on direct, loud verbal commands because passengers must hear and act immediately. A failed public address system cannot deliver these commands reliably, so crew must project their voices and repeat instructions. Direct commands also allow crew to adapt to the situation in real time.

Question 37Aviation Safety and Emergency Procedures

During an emergency evacuation, why should crew shout commands continuously and loudly?

  1. To overcome noise and panic so passengers keep moving toward the exits Correct answer.
  2. To warn other crew members that the flight deck has been informed
  3. To signal to air traffic control that an evacuation is in progress
  4. To comply with a requirement to record the evacuation on the cockpit voice recorder

Explanation

Continuous loud commands cut through engine noise, alarms, and panic, keeping passengers moving toward usable exits. Repetition reinforces the instruction and helps passengers who are disoriented. The aim is to maintain flow and prevent congestion at exits.

Question 38Aviation Safety and Emergency Procedures

During a decompression at high altitude, why should cabin crew avoid holding their breath?

  1. Holding the breath increases the risk of ear infection during descent
  2. Holding the breath can cause pressure injury to the lungs as cabin pressure changes rapidly Correct answer.
  3. Holding the breath reduces the effectiveness of the emergency lighting
  4. Holding the breath prevents the oxygen mask from sealing correctly

Explanation

During rapid decompression, the pressure around the body falls quickly, and holding the breath traps expanding air in the lungs, which can cause barotrauma. Crew should breathe normally and secure oxygen as soon as possible. This protects the lungs and maintains consciousness.

Question 39Aviation Safety and Emergency Procedures

A crew member is assessing whether a passenger is suitable for an exit-row seat. Which combination of factors is most relevant?

  1. Frequent flyer status, age, and preferred seat type
  2. Language spoken, meal preference, and baggage weight
  3. Seat number, boarding group, and loyalty tier
  4. Physical ability, understanding of instructions, and willingness to assist in an emergency Correct answer.

Explanation

Exit-row suitability depends on whether the passenger is physically able to open the exit, understands crew instructions, and is willing to assist in an emergency. These factors determine whether the passenger can perform the exit-row role. Other attributes such as status or meal preference are irrelevant to safety.

Question 40Aviation Safety and Emergency Procedures

During cruise, a cabin crew member smells burning and sees light grey smoke curling from the seam of an overhead stowage bin. What is the crew member's immediate priority?

  1. Wait for the flight crew to confirm the smoke is electrical
  2. Identify the source and cut off its oxygen or power supply Correct answer.
  3. Open the bin fully to locate the burning item
  4. Spray the bin exterior with water to cool the latch

Explanation

Firefighting in the cabin follows the principle of locating the fire and removing one leg of the fire triangle, usually by isolating electrical power or starving the fire of oxygen with a suitable extinguishing agent. Opening a bin containing a fire can feed it with a sudden rush of air and cause flashover toward the crew member. Crews therefore attack the seat of the fire while keeping the bin closed as far as practicable and communicating continuously with the flight deck.

Question 41Aircraft Familiarisation and Cabin Systems

On a pressurised commercial aircraft, what is the primary function of the cabin outflow valve?

  1. It regulates the rate at which cabin air is released overboard, thereby controlling cabin pressure Correct answer.
  2. It supplies conditioned air from the engines into the cabin distribution system
  3. It seals the cargo compartment from the passenger cabin during flight
  4. It shuts off the bleed air supply whenever the engines are started

Explanation

Cabin pressure is maintained by controlling how fast air leaves the fuselage, not by how fast it enters. The outflow valve modulates its opening to hold the selected cabin altitude and rate of climb or descent. It works together with the pressurisation controller, which commands valve position.

Question 42Aircraft Familiarisation and Cabin Systems

A cabin crew member notices the cabin altitude warning appearing while the aircraft is at cruise. What is the most appropriate immediate action?

  1. Continue serving and monitor the warning for a few minutes
  2. Open the cabin doors to equalise pressure
  3. Switch off the cabin lighting to reduce electrical load
  4. Don the nearest oxygen mask and follow the emergency descent drill Correct answer.

Explanation

A cabin altitude warning indicates the cabin pressure altitude is rising toward a level where hypoxia becomes a risk. Crew must secure their own oxygen first so they remain able to act, then follow the operator's emergency descent and communication drill. Delaying action allows hypoxia to impair judgement.

Question 43Aircraft Familiarisation and Cabin Systems

Which statement correctly describes the purpose of the cabin pressure controller?

  1. It compares sensed cabin pressure with a scheduled profile and commands the outflow valve accordingly Correct answer.
  2. It monitors engine oil pressure and shuts down the engine
  3. It physically opens and closes the passenger doors during boarding
  4. It controls the temperature of the galley ovens

Explanation

The controller continuously compares actual cabin pressure with a scheduled cabin altitude profile and sends commands to the outflow valve. This closed-loop control keeps cabin altitude changes comfortable and within limits. The valve is the actuator, while the controller is the decision-making element.

Question 44Aircraft Familiarisation and Cabin Systems

During cruise, the cabin altitude is normally held at approximately which value?

  1. Equal to the aircraft's actual altitude
  2. Sea level at all times
  3. Between about 6,000 and 8,000 feet Correct answer.
  4. Around 18,000 feet

Explanation

Airliners normally schedule cabin altitude between roughly 6,000 and 8,000 feet at high cruise levels. This keeps the partial pressure of oxygen acceptable for passengers while limiting structural pressure differential. Holding sea level would increase differential pressure and structural fatigue unnecessarily.

Question 45Aircraft Familiarisation and Cabin Systems

What is the function of the air conditioning packs on a transport aircraft?

  1. They cool and condition bleed air before it enters the cabin distribution system Correct answer.
  2. They generate electrical power for the cabin
  3. They deploy the passenger oxygen masks
  4. They store drinking water for the galley

Explanation

Air conditioning packs take hot bleed air and cool it, remove moisture, and regulate its temperature before delivery to the cabin. The conditioned air is then distributed through risers and ceiling outlets. Packs therefore govern cabin temperature and ventilation quality.

Question 46Aircraft Familiarisation and Cabin Systems

A passenger reports that the air vent above their seat is blowing warm air while the rest of the cabin is cool. What is the most suitable crew response?

  1. Open an emergency exit to cool the cabin
  2. Tell the passenger that vents cannot be adjusted
  3. Turn off the entire air conditioning system
  4. Adjust or close the individual gasper and report the condition to maintenance Correct answer.

Explanation

Individual gasper outlets can usually be adjusted or closed by the passenger or crew, which resolves local discomfort. If the condition persists it should be recorded and reported so maintenance can check the distribution system. Crew should not disable a whole cabin system for a local issue.

Question 47Aircraft Familiarisation and Cabin Systems

What is the purpose of the recirculation fans in a cabin air system?

  1. They provide backup electrical power
  2. They pressurise the hydraulic reservoirs
  3. They circulate fuel between the wing tanks
  4. They move filtered cabin air back into the distribution system to reduce bleed air demand Correct answer.

Explanation

Recirculation fans return filtered cabin air to the mixing manifold so that less fresh bleed air is required. This reduces fuel penalty from bleed extraction while maintaining ventilation. The recirculated air passes through high-efficiency filters before reuse.

Question 48Aircraft Familiarisation and Cabin Systems

Which component releases passenger oxygen masks automatically in the cabin?

  1. The masks drop when the seat belt sign is switched on
  2. The cabin crew pull a manual handle in each galley
  3. The passenger service unit doors open when the oxygen system is activated by a pressure signal Correct answer.
  4. The pilots press a button on the overhead panel for each row

Explanation

Chemical or gaseous oxygen systems are activated automatically when cabin altitude exceeds a preset threshold, and the passenger service unit doors open to release the masks. Crew can also trigger the system manually from the flight deck. The masks are then available for passengers to pull toward their faces.

Question 49Aircraft Familiarisation and Cabin Systems

Why must cabin crew don their own oxygen mask before assisting passengers during a decompression?

  1. Because hypoxia can impair their judgement within seconds, leaving them unable to help Correct answer.
  2. Because passenger masks are not designed for crew use
  3. Because company policy requires crew to test the mask first
  4. Because the mask supplies communication only

Explanation

At high cabin altitudes the time of useful consciousness can be very short, and hypoxia degrades reasoning before the person notices. Crew who secure their own oxygen first remain capable of directing passengers and managing the situation. This is why the standard instruction is to secure yourself before assisting others.

Question 50Aircraft Familiarisation and Cabin Systems

In a chemical oxygen generator system, what happens once the generator is activated?

  1. The masks retract automatically after thirty seconds
  2. The reaction cannot be stopped and continues until the generator is exhausted Correct answer.
  3. The supply can be switched off from the flight deck at any time
  4. The generator can be restarted after cooling

Explanation

Chemical oxygen generators produce oxygen through an exothermic reaction that, once started, runs to completion and cannot be shut off. Crew should therefore treat an activated generator as a heat source and follow procedures for the affected area. The duration is limited by the generator's design.