B737 Air Conditioning System Quiz
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Questions and Answers

How many water extractors are installed on B737-800/900?

  • None, this aircraft type does not use water extractors
  • Four, two in each air conditioning pack
  • Two, one in each air conditioning pack (correct)
  • Six, three in each air conditioning pack
  • What are the indications of a pack trip on B737 800/900?

  • No indication, the system automatically resets
  • PACK amber light, MASTER CAUTION and AIR COND annunciator lights (correct)
  • MASTER CAUTION and AIR COND annunciator lights
  • PACK amber light and MASTER CAUTION lights
  • Where does the flight compartment get conditioned air from?

  • The mix manifold (correct)
  • The air conditioning packs directly
  • The right pack and the mix manifold
  • The left pack and the mix manifold
  • Where are the main air distribution components located?

    <p>In the distribution compartment aft of the forward cargo compartment</p> Signup and view all the answers

    Which component controls the trim air pressure regulating and shutoff valve on the temperature controls panel?

    <p>The trim air switch</p> Signup and view all the answers

    On a B737 800/900, what is the primary flight compartment zone temperature control channel?

    <p>A channel of LEFT pack/zone temperature controller</p> Signup and view all the answers

    What is the function of the water extractor on a B737 800/900?

    <p>To extract water from the air</p> Signup and view all the answers

    How many air conditioning packs are there on a B737 800/900?

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

    What happens to the cockpit and passenger lighting if the bus causes a partial loss?

    <p>All cabin lights will extinguish</p> Signup and view all the answers

    What powers the emergency exit lights and signs?

    <p>Separate emergency power supplies in the passenger cabin</p> Signup and view all the answers

    What is the maximum refuelling pressure?

    <p>50 PSI</p> Signup and view all the answers

    What is the voltage used by most of the flight compartment lights?

    <p>28 VDC</p> Signup and view all the answers

    To defuel No. 1 tank, what should be selected?

    <p>No. 1 main tank fuel pumps on, crossfeed valve open and manual defuelling valve open</p> Signup and view all the answers

    When will the emergency exit lights automatically come on when armed?

    <p>If electrical power to DC bus 1 fails or AC power is turned off</p> Signup and view all the answers

    When will the no smoking signs illuminate when selected to auto?

    <p>When the landing gear is extended and the flaps are greater than 10 degrees</p> Signup and view all the answers

    What tank does the fuel temperature indicator read?

    <p>No. 1 tank</p> Signup and view all the answers

    Where is the manual defuelling valve located?

    <p>Inboard of the No. 2 engine</p> Signup and view all the answers

    What happens to the fasten belts signs when selected to auto?

    <p>They will illuminate when the landing gear or flaps are extended</p> Signup and view all the answers

    What supplies emergency general lighting in the event of a complete electrical power failure?

    <p>The left dome light</p> Signup and view all the answers

    How many dripsticks are installed in each main tank?

    <p>6</p> Signup and view all the answers

    What type of lighting is found in each wheel well?

    <p>A dome light and a floodlight</p> Signup and view all the answers

    When do the fuelling valve position lights on the external fuelling panel illuminate?

    <p>When the respective fuelling valve is open and fuel is being transferred into the tank</p> Signup and view all the answers

    How can refuelling be accomplished when the APU is inoperative and no external power is available?

    <p>Battery switch on, standby power switch bat, the entire fuel system will operate normally</p> Signup and view all the answers

    To defuel No. 2 tank only, what should be selected?

    <p>No. 1 and No. 2 main tank fuel pumps on, crossfeed valve open and manual defuelling valve open</p> Signup and view all the answers

    What is the correct procedure to lower the service unit?

    <p>Insert a small allen wrench or other applicable tool into the latch release hole</p> Signup and view all the answers

    What conditions does the fire protection system monitor the airplane for?

    <p>Fire, Smoke, Overheat, Pneumatic duct leaks</p> Signup and view all the answers

    Where do the fire alarms provide visual and aural indication to the flight crew about a fire?

    <p>Avionic compartment, Forward cargo compartment, Aft cargo compartment and Main wheel well</p> Signup and view all the answers

    How many engine fire detectors are there in each engine?

    <p>Four detectors</p> Signup and view all the answers

    Which components monitor detectors for overheat and fire conditions on the engine and fire conditions on the APU?

    <p>The engine and APU fire detection module</p> Signup and view all the answers

    What does the FAULT/INOP test do?

    <p>A check of the module overheat and fire detection circuitry and flight compartment indications</p> Signup and view all the answers

    What is monitored by the fire protection system?

    <p>Fire, smoke, and overheat conditions</p> Signup and view all the answers

    Where is the fire alarm system located?

    <p>Engine, APU, and avionic compartment</p> Signup and view all the answers

    When will the No Smoking signs illuminate?

    <p>When gear and flaps are extended</p> Signup and view all the answers

    What does placing the lights test switch to the test position do?

    <p>Illuminates all cockpit lighting and warning lights</p> Signup and view all the answers

    When do the emergency lights come on if the P5 switch is in the arm position?

    <p>When the main lighting system has failed</p> Signup and view all the answers

    When does the taxi light turn off with the taxi light switch set to auto position?

    <p>When the nose landing gear is not in the down and locked position</p> Signup and view all the answers

    What does the airplane pitot system consist of?

    <p>Captain's, First Officer's, Auxiliary No. 1 and Auxiliary No. 2</p> Signup and view all the answers

    What does the airplane static system consist of?

    <p>Captain's, First Officer's, Auxiliary No. 1, Auxiliary No. 2 and Alternate</p> Signup and view all the answers

    What does the Electronic Horizontal Situation Indicator (EHSI) provide?

    <p>A multicolor display of various navigational and weather radar data</p> Signup and view all the answers

    How many navigation unit (VOR/ILS receivers) are installed on the aircraft?

    <p>02 units</p> Signup and view all the answers

    Study Notes

    B737 Air Conditioning System

    • Four water extractors are installed on the B737-800/900, with two in each air conditioning pack.
    • Pack trip indications include PACK amber light, MASTER CAUTION, and AIR COND annunciator lights.
    • The flight compartment receives conditioned air from the mix manifold along with the right pack.
    • Main air distribution components are located in the distribution compartment aft of the forward cargo compartment.
    • The trim air pressure regulating and shutoff valve is controlled by the trim air switch on the temperature controls panel.
    • Primary flight compartment zone temperature control channel is part of the ACAU system.

    Electrical and Lighting Systems

    • BUS CAUSES can lead to partial loss of cockpit and passenger lighting.
    • Emergency exit lights and signs are powered from separate emergency power supplies installed in the passenger cabin.
    • Most flight compartment lights use 28 VDC.
    • Emergency exit lights activate automatically if electrical power to the DC bus fails or AC power is turned off.
    • No smoking signs illuminate automatically when the landing gear is extended and flaps are retracted.

    Fuel System

    • To defuel the No. 1 tank, activate the No. 1 main tank fuel pumps, open the crossfeed valve, and open the manual defueling valve.
    • The fuel temperature indicator reads the temperature of fuel in the No. 1 tank.
    • The manual defueling valve is located outboard of the No. 2 engine.
    • Dripsticks (or floatsticks) are installed with 5 in each main tank and 2 in the center tank.
    • Fueling valve position lights illuminate blue when the respective fueling valve is open and fuel is being transferred into the tank.

    Fire Protection Systems

    • Fire protection systems monitor for fire, smoke, overheat, and pneumatic duct leaks.
    • Fire alarms provide crew indications for fires in engines, APU, avionics compartment, and cargo compartments.
    • Each engine has four fire detectors.
    • The engine and APU fire detection module monitors for overheat and fire conditions.

    Emergency Systems

    • Emergency lights activate when the main lighting system fails or when specific voltage parameters are met.
    • Taxi lights switch to off when the nose landing gear is not down and locked or after the first engine stop.

    Aircraft Systems Overview

    • Pitot system includes Captain's, First Officer's, and Auxiliary No. 1 instruments.
    • Static system consists of Captain's, First Officer's, and both Auxiliary No. 1 and No. 2 instruments.
    • The Electronic Horizontal Situation Indicator (EHSI) provides a multicolor display of navigational and weather radar data.
    • Two navigation unit (VOR/ILS receivers) are installed on the aircraft.
    • Supplemental navigation data pages are accessible at any time.

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    Description

    Test your knowledge of the air conditioning system on the Boeing 737-800/900 aircraft. Questions cover water extractors and pack trip indications.

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