Aircraft Water and Waste System Overview
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Questions and Answers

What subsystems make up the water and waste system?

  • Drinking water system, sewage system, drainage system
  • Water supply system, HVAC system, electrical system
  • Water purification system, recycling system, irrigation system
  • Potable water system, waste water system, toilet system (correct)

    • How is the potable water tank pressurized to supply water?

  • Compressed air from the bleed air system or ground pressure connection (correct)
  • Wind energy conversion
  • Hydraulic pump system
  • Solar power backup

    • What controls the heating of water pipes in icing conditions?

  • Manual water pipe insulation adjustment
  • Heating elements based on ambient temperature
  • Water flow rate regulation valves
  • Tape electrical heaters controlled by anti ice control units (correct)

    • How is each lavatory connected to the potable water distribution system?

    <p>Through a manual shut-off valve for isolation</p> Signup and view all the answers

    What is used to prevent ice formation in the potable water servicing panel?

    <p>Heating elements installed in the panel</p> Signup and view all the answers

    How are water faucets in the aircraft supplied with water?

    <p>Through a distribution system from the water tank</p> Signup and view all the answers

    What is the maximum amount of water used to flush the waste tank?

    <p>57 liters</p> Signup and view all the answers

    In cold weather conditions, why must the potable water system be drained?

    <p>To prevent damage to the system by ice</p> Signup and view all the answers

    What must be done if the drain mast is not heated?

    <p>Not dispatch the aircraft</p> Signup and view all the answers

    What is the purpose of moving the drain valve control-handle to the open position?

    <p>Drain waste from the toilet tank</p> Signup and view all the answers

    What should be done after flushing the waste tank with water?

    <p>Drain the water from the tank</p> Signup and view all the answers

    Under what condition can an aircraft be dispatched if the drain mast is not heated?

    <p>When galley and toilet use is restricted</p> Signup and view all the answers

    What is used to prevent ice formation in the fill/drain nipple and overflow nipple?

    <p>Electric heating</p> Signup and view all the answers

    What controls the potable water service panel heating?

    <p>Thermostat</p> Signup and view all the answers

    What must be done in winter conditions regarding the potable water system during night stops?

    <p>It must be drained</p> Signup and view all the answers

    Where are the water and waste indications displayed?

    <p>Flight Attendant Panel (FAP)</p> Signup and view all the answers

    How is the filling quantity selected for the water tank?

    <p>25%, 50%, 75%, and 100%</p> Signup and view all the answers

    What happens when the fill/drain control handle is set to the drain position?

    <p>Forward drain valve opens</p> Signup and view all the answers

    Where is the waste holding tank installed on the aircraft?

    <p>Right of the aircraft under the floor behind the bulk cargo compartment</p> Signup and view all the answers

    What controls the flushing system operation in the toilet system?

    <p>Vacuum System Controller Function (VSCF)</p> Signup and view all the answers

    What is the purpose of the fill/drain control handle?

    <p>To select a filling or draining operation for the water</p> Signup and view all the answers

    Where is the potable water service panel located?

    <p>In the rear left hand side of the fuselage</p> Signup and view all the answers

    What happens when the potable water service panel door is opened?

    <p>The water and waste page appears automatically on the FAP</p> Signup and view all the answers

    Where is the FAP located?

    <p>In the forward section of the cabin</p> Signup and view all the answers

    What information does the FAP display about the potable water system?

    <p>The water quantity stored in the potable water tank</p> Signup and view all the answers

    Where is the toilet service panel located?

    <p>In the rear right hand side of the fuselage between FR65 and FR66</p> Signup and view all the answers

    What happens when the toilet service panel door is opened on the ground?

    <p>The Cabin Intercommunication Data System (CIDS) stops all toilet operations</p> Signup and view all the answers

    What does the FAP display about the waste holding tank?

    <p>The waste quantity stored in the waste holding tank</p> Signup and view all the answers

    What happens when a lavatory is deactivated?

    <p>All of the above</p> Signup and view all the answers

    What is the primary purpose of the compressed air used in the potable water system?

    <p>To pressurize the system and supply water from the tank to the necessary service locations</p> Signup and view all the answers

    Where is the potable water tank located?

    <p>In the pressurized LH underfloor area rear of the aft cargo compartment</p> Signup and view all the answers

    What is the purpose of the water heaters installed in the lavatories and galleys?

    <p>To provide hot water to the water faucets in the lavatories and galleys</p> Signup and view all the answers

    What is the purpose of the anti-ice control units installed in the cargo compartments?

    <p>To automatically control the heating elements that prevent ice formation in the water pipes</p> Signup and view all the answers

    How are mechanically or electrically operated valves used in the potable water system?

    <p>To control the supply of water from the water tank to the water faucets in the galleys and lavatories</p> Signup and view all the answers

    What is the purpose of the potable water service panel heating?

    <p>To prevent ice formation in the potable water servicing panel in icing conditions</p> Signup and view all the answers

    What is the purpose of the manual shut-off valves installed in each lavatory?

    <p>To isolate each lavatory from the potable water distribution system</p> Signup and view all the answers

    What is the purpose of the electrically heated fill/drain nipple and overflow nipple?

    <p>To prevent ice formation in the remaining water</p> Signup and view all the answers

    Where is the potable water service panel located?

    <p>In the rear lower fuselage on the LH side</p> Signup and view all the answers

    What controls the flushing system operation in the toilet system?

    <p>The Vacuum System Controller Function (VSCF)</p> Signup and view all the answers

    Where is the waste holding tank installed on the aircraft?

    <p>On the right of the aircraft under the floor behind the bulk cargo compartment</p> Signup and view all the answers

    How is the potable water tank pressurized to supply water?

    <p>Using the aircraft's pressurized water system</p> Signup and view all the answers

    What happens when the potable water service panel door is opened?

    <p>All of the above</p> Signup and view all the answers

    What must be done in winter conditions regarding the potable water system during night stops?

    <p>The potable water system must be drained</p> Signup and view all the answers

    What happens when the forward drain valve open light comes on?

    <p>The light has a lamp press to test facility</p> Signup and view all the answers

    Where is the forward water drain panel located on the aircraft?

    <p>On the A/C center line of the lower fuselage</p> Signup and view all the answers

    What is the purpose of the door microswitch related to the potable water service panel?

    <p>Isolates the indicating system when the door is open</p> Signup and view all the answers

    When does the water and waste page come on automatically on the Flight Attendant Panel (FAP)?

    <p>When the service panel door is opened</p> Signup and view all the answers

    Where is the toilet service panel installed on the aircraft?

    <p>In the rear right side of the fuselage</p> Signup and view all the answers

    What message comes on when the toilet service panel is open on ground?

    <p>&quot;Vacuum System Disabled - Ground Servicing&quot;</p> Signup and view all the answers

    What does a grey square symbolize on the aircraft symbol concerning lavatories?

    <p>Activated lavatory</p> Signup and view all the answers

    What is the maximum pressure allowed when flushing the waste tank?

    <p>3.45 bar (50.0380 psi)</p> Signup and view all the answers

    How much disinfectant solution should be filled in the toilet tank after draining?

    <p>10 liters</p> Signup and view all the answers

    What should be done if waste fluids such as oil, fuel, solvent or lubricant are spilled?

    <p>Sort them and use special waste disposal containers</p> Signup and view all the answers

    What is the approximate time required for flushing the waste tank with water?

    <p>90 seconds</p> Signup and view all the answers

    If the drain mast is not heated, what action should be taken?

    <p>The associated galleys or toilets must be locked and placarded as inoperative</p> Signup and view all the answers

    What should be done with the drain valves if the bleed air system is off and the external air temperature is below 0°C (32°F)?

    <p>The drain valves must be left open</p> Signup and view all the answers

    What is the maximum amount of water that should be used to flush the waste tank?

    <p>57 liters (15.0576 USgal)</p> Signup and view all the answers

    What should be done after draining the water from the tank?

    <p>Fill the tank with disinfectant solution</p> Signup and view all the answers

    What controls the heating of water pipes in icing conditions?

    <p>The information is not provided in the text</p> Signup and view all the answers

    What is the primary purpose of the compressed air used in the potable water system?

    <p>To pressurize the potable water tank and supply water to the necessary service locations</p> Signup and view all the answers

    Where is the potable water tank installed on the aircraft?

    <p>In the pressurized LH underfloor area rear of the aft cargo compartment</p> Signup and view all the answers

    What is the purpose of the water heaters installed in the lavatories and galleys?

    <p>To heat the water for the faucets and sinks</p> Signup and view all the answers

    What is the purpose of the anti-ice control units installed in the cargo compartments?

    <p>To control the heating of the water pipes in icing conditions</p> Signup and view all the answers

    How is each lavatory connected to the potable water distribution system?

    <p>Through a manual shut-off valve that can isolate the lavatory from the system</p> Signup and view all the answers

    What is the purpose of the potable water service panel heating?

    <p>To prevent ice formation in the potable water servicing panel in icing conditions</p> Signup and view all the answers

    What subsystems make up the water and waste system?

    <p>Potable water system, waste water system, and toilet system</p> Signup and view all the answers

    What is the main purpose of flushing the waste tank with water?

    <p>To clean and disinfect the tank</p> Signup and view all the answers

    What should be done with the drain valves if the bleed air system is off and the external air temperature is below 0°C (32°F)?

    <p>Open the drain valves to allow the system to drain</p> Signup and view all the answers

    What is the maximum pressure allowed when flushing the waste tank?

    <p>3.45 bar (50.04 psi)</p> Signup and view all the answers

    How much disinfectant solution should be added to the toilet tank after draining?

    <p>10 liters</p> Signup and view all the answers

    What is the approximate time required for flushing the waste tank with water?

    <p>90 seconds</p> Signup and view all the answers

    What must be done if the drain mast is not heated?

    <p>The aircraft can be dispatched if the associated galleys and toilets are not used</p> Signup and view all the answers

    What is the purpose of moving the drain valve control-handle to the open position?

    <p>To drain the waste from the toilet tank</p> Signup and view all the answers

    What is the maximum amount of water that should be used to flush the waste tank?

    <p>57 liters (15.0576 gallons)</p> Signup and view all the answers

    What is the primary purpose of the compressed air used in the potable water system?

    <p>To pressurize the potable water tank</p> Signup and view all the answers

    What does the tank full light indicate?

    <p>The water tank is full</p> Signup and view all the answers

    Where is the forward water drain panel located?

    <p>On the A/C center line of the lower fuselage</p> Signup and view all the answers

    What is indicated by the tank symbol with a scale on the Flight Attendant Panel (FAP)?

    <p>Liquid level in percentage</p> Signup and view all the answers

    What happens when the toilet service panel door is open on ground?

    <p>CIDS stops all toilet operations</p> Signup and view all the answers

    What information does the FAP display about the waste holding tank?

    <p>Waste quantity in percentage</p> Signup and view all the answers

    When does the FAP WATER/WASTE page appear automatically?

    <p>When there is a fault in the system</p> Signup and view all the answers

    What does the amber cross symbolize on the lavatory square of the aircraft symbol?

    <p>De-activated lavatory due to no communication with flush control unit</p> Signup and view all the answers

    What is the purpose of the electrical heating elements in the drain masts?

    <p>To prevent ice formation during flight and in cold weather</p> Signup and view all the answers

    How does the toilet system operate at high altitudes?

    <p>It relies on the differential pressure between the cabin and atmosphere to move waste</p> Signup and view all the answers

    What component controls the flushing system operation in the toilet system?

    <p>The Vacuum System Controller Function (VSCF)</p> Signup and view all the answers

    Where is the Vacuum System Controller Function (VSCF) installed?

    <p>In the avionics compartment</p> Signup and view all the answers

    What happens when the waste servicing panel is open?

    <p>The toilet system operation stops</p> Signup and view all the answers

    What component is used to separate water from the waste in the holding tank?

    <p>A water separator</p> Signup and view all the answers

    How is the filling quantity for the potable water tank selected?

    <p>By selecting the desired percentage (25%, 50%, 75%, or 100%) on the FAP</p> Signup and view all the answers

    How is the potable water tank pressurized to supply water?

    <p>By using compressed air from the bleed air system or ground pressure connection</p> Signup and view all the answers

    What prevents ice formation in the potable water servicing panel in icing conditions?

    <p>Heated tape electrical heaters</p> Signup and view all the answers

    What component controls the supply of the potable water system?

    <p>Electrically operated valves</p> Signup and view all the answers

    What is the purpose of the manual shut-off valves installed in each lavatory?

    <p>To isolate each lavatory from the potable water distribution system</p> Signup and view all the answers

    Why are water pipes, where icing conditions can occur, insulated and heated?

    <p>To prevent ice formation on the pipes</p> Signup and view all the answers

    What controls the automatic heating of the water pipes in icing conditions?

    <p>Two anti ice control units installed in the cargo compartments</p> Signup and view all the answers

    Where is one of the water heaters installed within the aircraft?

    <p>In each lavatory and galley</p> Signup and view all the answers

    How is compressed air supplied to pressurize the potable water system?

    <p>From the bleed air system in normal configuration or a ground pressure connection</p> Signup and view all the answers

    What prevents ice formation in the potable water service panel?

    <p>Heated tape electrical heaters</p> Signup and view all the answers

    How does the potable water get supplied to water faucets in galleys and lavatories?

    <p>From a distribution system connected to the water tank</p> Signup and view all the answers

    What controls the operation of the potable water system's heating in icing conditions?

    <p>Thermostat</p> Signup and view all the answers

    Where is the waste holding tank installed on the aircraft?

    <p>On the right under the floor behind the bulk cargo compartment</p> Signup and view all the answers

    What triggers the stopping of the flushing system operation in the toilet system?

    <p>Liquid level sensor</p> Signup and view all the answers

    Which component prevents ice formation in the drain masts during cold weather?

    <p>Integrated heating elements</p> Signup and view all the answers

    How is waste moved from the toilet bowl to the waste holding tank at high altitude?

    <p>Differential pressure between cabin and atmosphere</p> Signup and view all the answers

    Where is the door microswitch located in relation to the potable water service panel?

    <p>On the door itself</p> Signup and view all the answers

    What is used to supply potable water for flushing in the toilet system?

    <p><strong>Potable water tank</strong></p> Signup and view all the answers

    Which system controls and stops toilet system operation when needed?

    <p><strong>Vacuum System Controller Function (VSCF)</strong></p> Signup and view all the answers

    What is used to discard used water from lavatories and galley sinks?

    <p>Waste water system with drain valve and drain mast</p> Signup and view all the answers

    How does waste move from a toilet bowl to a waste holding tank at low altitude or on ground?

    <p>Vacuum generator activates differential pressure</p> Signup and view all the answers

    What is the purpose of the fill/drain control handle?

    <p>To select a filling or draining operation for the potable water tank</p> Signup and view all the answers

    Where is the forward water drain panel located?

    <p>On the A/C center line of the lower fuselage</p> Signup and view all the answers

    What is the purpose of the door microswitch on the potable water service panel?

    <p>It isolates the indicating system when the panel is closed</p> Signup and view all the answers

    What is the purpose of the tank full light?

    <p>It indicates when the water tank is full</p> Signup and view all the answers

    What is the purpose of the water and waste page on the Flight Attendant Panel (FAP)?

    <p>All of the above</p> Signup and view all the answers

    What is the purpose of the drain control handle at the toilet service panel?

    <p>To manually operate the waste holding tank drain valve</p> Signup and view all the answers

    What is indicated by the grey square on the aircraft symbol for a lavatory?

    <p>The lavatory is activated</p> Signup and view all the answers

    What is indicated by the amber square on the aircraft symbol for a lavatory?

    <p>The lavatory is deactivated</p> Signup and view all the answers

    What is the purpose of the RESET WARNING button on the FAP?

    <p>To reset the water and waste system in case of flush valve failure</p> Signup and view all the answers

    What message comes on when the toilet service panel is open on the ground?

    <p>VACUUM SYSTEM DISABLED-GROUND SERVICING</p> Signup and view all the answers

    What is the maximum pressure allowed when flushing the waste tank?

    <p>$3.45 bar (50.0380 psi)$</p> Signup and view all the answers

    What should be done with the drain valves if the bleed air system is off and the external air temperature is below 0C (32F)?

    <p>The drain valves must remain open after the potable water system is drained to prevent damage to the potable water system.</p> Signup and view all the answers

    What is the main purpose of flushing the waste tank with water?

    <p>To clean the waste tank</p> Signup and view all the answers

    What should be done after draining the water from the tank?

    <p>Fill the toilet tank with 10 l of disinfectant solution.</p> Signup and view all the answers

    What is the approximate time required for flushing the waste tank with water?

    <p>90 seconds</p> Signup and view all the answers

    What should be done if waste fluids such as oil, fuel, solvent or lubricant are spilled?

    <p>Sort them and use special waste disposal containers.</p> Signup and view all the answers

    What is the maximum amount of water that should be used to flush the waste tank?

    <p>57 l (15.0576 USgal)</p> Signup and view all the answers

    What happens when a lavatory is deactivated?

    <p>The lavatory door is locked, and a placard is placed indicating it is inoperative.</p> Signup and view all the answers

    What is the purpose of the electrical heating elements in the drain masts?

    <p>To heat the drain masts and prevent ice formation.</p> Signup and view all the answers

    What is the primary purpose of the compressed air used in the potable water system?

    <p>To pressurize the potable water tank.</p> Signup and view all the answers

    What is the purpose of the potable water service panel heating?

    <p>To prevent ice formation in the fill/drain nipple and overflow nipple.</p> Signup and view all the answers

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