11.17 Water / Waste Flashcards
(29 cards)
What is potable water?
A. Water used for engine cooling
B. Non-consumable water for cleaning only
C. Drinkable water used for galleys and lavatories
C. Drinkable water used for galleys and lavatories
Where is potable water typically stored on a large commercial aircraft?
A. In the wings
B. In the tail section
C. Below the cabin floor, usually in the cargo area sidewalls
C. Below the cabin floor, usually in the cargo area sidewalls
What are potable water supply lines typically made from?
A. Aluminium tubing
B. Reinforced plastic hoses enclosed in a protective conduit
C. Copper piping
B. Reinforced plastic hoses enclosed in a protective conduit
When is it necessary to completely drain the potable water system?
A. After long-haul flights
B. Only during a fuel stop
C. Before disinfecting the system, when parking in freezing weather, and every three days
C. Before disinfecting the system, when parking in freezing weather, and every three days
From where is the potable water system serviced?
A. From the lavatory
B. From the flight deck
C. From a dedicated water servicing panel
C. From a dedicated water servicing panel
How are potable water tanks typically filled?
A. Until a pressure gauge shows 60 psi
B. Until water comes out of the overflow line
C. Until a red light turns on in the cockpit
B. Until water comes out of the overflow line
In modern aircraft, what controls automatic stopping of the water fill process?
A. Manual shut-off valve
B. Flight crew switch
C. Quantity control unit
C. Quantity control unit
What is the purpose of the header in the water system?
A. To heat the water
B. To distribute water to the toilet, water heater, and mixer valve
C. To collect wastewater from lavatories
B. To distribute water to the toilet, water heater, and mixer valve
What does a mixer valve do in the lavatory water system?
A. Mixes cold water from the header with hot water from the heater
B. Regulates water pressure
C. Removes bacteria from incoming water
A. Mixes cold water from the header with hot water from the heater
How does a mechanical faucet work?
A. Controlled by the cabin crew only
B. Uses electronic sensors only
C. Operates with an actuator button or internal cartridge, or via infrared control
C. Operates with an actuator button or internal cartridge, or via infrared control
How is wastewater typically removed from the aircraft?
A. Collected in a fuel tank
B. Drained through drain lines and drain masts
C. Burned off using heat exchangers
B. Drained through drain lines and drain masts
What is grey water in aviation terms?
A. Frozen waste
B. Fuel-contaminated water
C. Wastewater that doesn’t include toilet waste (e.g., soapy or leftover clean water)
C. Wastewater that doesn’t include toilet waste (e.g., soapy or leftover clean water)
What is used to prevent freezing in wastewater lines and drain masts?
A. Chemical additives
B. Manual heating rods
C. Electrical heaters or warm pneumatic air
C. Electrical heaters or warm pneumatic air
Where is grey water sometimes directed, other than overboard drainage?
A. Into the fuel tanks
B. Into the toilet waste holding tank
C. Into the oxygen system
B. Into the toilet waste holding tank
What is the purpose of the heated drain masts on an aircraft?
A. To sterilise drinking water
B. To prevent freezing of waste water in-flight
C. To vent air from the pressurised fuselage
B. To prevent freezing of waste water in-flight
What are the two main types of toilet waste systems installed on aircraft?
A. Chemical and electric toilets
B. Recirculating and pressurised systems
C. Flush motor toilets and vacuum toilet systems
C. Flush motor toilets and vacuum toilet systems
What best describes a flush motor toilet system in simple terms?
A. A vacuum-based toilet that uses suction to remove waste
B. A toilet that flushes waste into a tank using a motor-driven spray of flushing agent
C. A manually operated toilet that uses no electricity
B. A toilet that flushes waste into a tank using a motor-driven spray of flushing agent
What best describes a vacuum toilet system in simple terms?
A. A toilet that burns waste using heat
B. A high-pressure water toilet system
C. A toilet that uses suction to move waste into a central tank
C. A toilet that uses suction to move waste into a central tank
What component controls the vacuum toilet’s flushing sequence electronically?
A. A manual handle
B. The vacuum compressor switch
C. The Flush Control Unit (FCU)
C. The Flush Control Unit (FCU)
How is a vacuum toilet system typically serviced?
A. From a central waste panel on the lower fuselage, using drain valves and ground flush fittings
B. Each lavatory is serviced individually from inside the cabin
C. By removing the toilet from the aircraft for cleaning
A. From a central waste panel on the lower fuselage, using drain valves and ground flush fittings
How is a flush motor toilet system typically serviced?
A. Using a cabin-access panel behind the toilet
B. By flushing through the cockpit drain system
C. Using individual service panels located below the toilet area with drain and chemical refill access
C. Using individual service panels located below the toilet area with drain and chemical refill access
What is the waste service panel and where is it located?
A. A control panel inside the cockpit used to shut off lavatory water
B. A maintenance screen inside the lavatory for internal diagnostics
C. An external servicing panel on the lower part of the fuselage used for draining and flushing waste tanks
C. An external servicing panel on the lower part of the fuselage used for draining and flushing waste tanks
What happens after the flush motor toilet’s waste tank has been drained?
A. The aircraft must remain grounded for 24 hours
B. The toilet must be flushed with clean water and refilled with chemicals
C. A technician must manually remove the tank
B. The toilet must be flushed with clean water and refilled with chemicals
What allows modern vacuum waste tanks to vent particle-free air overboard during operation?
A. An electrostatic separator
B. A carbon filter system
C. Built-in separators inside the tanks
C. Built-in separators inside the tanks
