B737 Quiz: Air Conditioning System Insights

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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?

In the distribution compartment aft of the forward cargo compartment Signup and view all the answers

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

The trim air switch Signup and view all the answers

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

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

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

To extract water from the air Signup and view all the answers

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

Two Signup and view all the answers

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

All cabin lights will extinguish Signup and view all the answers

What powers the emergency exit lights and signs?

Separate emergency power supplies in the passenger cabin Signup and view all the answers

What is the maximum refuelling pressure?

50 PSI Signup and view all the answers

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

28 VDC Signup and view all the answers

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

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

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

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

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

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

What tank does the fuel temperature indicator read?

No. 1 tank Signup and view all the answers

Where is the manual defuelling valve located?

Inboard of the No. 2 engine Signup and view all the answers

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

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

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

The left dome light Signup and view all the answers

How many dripsticks are installed in each main tank?

6 Signup and view all the answers

What type of lighting is found in each wheel well?

A dome light and a floodlight Signup and view all the answers

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

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

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

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

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

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

What is the correct procedure to lower the service unit?

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

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

Fire, Smoke, Overheat, Pneumatic duct leaks Signup and view all the answers

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

Avionic compartment, Forward cargo compartment, Aft cargo compartment and Main wheel well Signup and view all the answers

How many engine fire detectors are there in each engine?

Four detectors Signup and view all the answers

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

The engine and APU fire detection module Signup and view all the answers

What does the FAULT/INOP test do?

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

What is monitored by the fire protection system?

Fire, smoke, and overheat conditions Signup and view all the answers

Where is the fire alarm system located?

Engine, APU, and avionic compartment Signup and view all the answers

When will the No Smoking signs illuminate?

When gear and flaps are extended Signup and view all the answers

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

Illuminates all cockpit lighting and warning lights Signup and view all the answers

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

When the main lighting system has failed Signup and view all the answers

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

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

What does the airplane pitot system consist of?

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

What does the airplane static system consist of?

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

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

A multicolor display of various navigational and weather radar data Signup and view all the answers

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

02 units 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.

B737 Air Conditioning System Quiz