AirCond_PressTest

What is the maximum allowable differential pressure ?
1. 7.90 psi
2. 8.45 psi
3. 8.65 psi
4. 9.10 psi
In normal cruise the air conditioning ram air doors
1. modulate between opened and closed according to cooling requirements.
2. remain fully closed.
3. remain fully open.
4. will open only if either pack trips off.
When are the ram air doors fully open ?
1. Only on the ground.
2. On the ground or during slow flight with the flaps retracted.
3. On the ground or during slow flight with the flaps not fully retracted.
A BLEED TRIP OFF is caused by
1. an over temperature condition.
2. an over pressure condition.
3. either an over temperature or over pressure condition.
4. an over pressure and over temperature condition.
What is the primary source of conditioned air for the flight deck ?
1. The left pack.
2. The right pack.
3. The mix manifold.
4. Both packs.
The recirc fans are each
1. driven by an AC motor.
2. driven by a DC motor.
The ram air system deflector doors are electrically extended
1. at any time the ram air doors are open.
2. when the landing gear is down.
3. when the flaps are extended.
4. when activated by the ground safety sensor.
How is the bleed air from the engine initially cooled for cabin temperature control ?
1. An heat exchanger in the ram air system.
2. The Air Cycle Machine (ACM).
3. Engine fan air.
The ram air doors are fully open in flight under which of the following conditions ?
1. Slow flight with the flaps not fully retracted.
2. Slow flight with the flaps fully retracted.
3. Low altitude as demanded by the temperature controller.
4. The ram air doors are only fully open on the ground.
An overheat in the APU bleed air duct will illuminate which warning light on the Bleed Air Panel ?
1. The left WING-BODY OVERHEAT warning light.
2. The right WING-BODY OVERHEAT warning light.
3. The left BLEED TRIP OFF warning light.
4. The right BLEED TRIP OFF warning light.
The OVHT TEST push button switch on the Bleed Air Panel tests which circuits ?
1. The wing body overheat circuits.
2. The bleed trip overheat sensor circuits.
3. The pack trip overheat sensor circuits.
4. The wing body overheat circuits and bleed trip overheat sensor circuits.
The PACK warning light indicates which condition ?
1. The pack temperature has exceeded limits.
2. Failure of a single pack controller.
3. The pack temperature has exceeded limits or both pack controllers have failed.
4. Failure of both pack controllers if the PACK warning light illuminates during a Master Caution recall.
The BLEED TRIP OFF light illuminated indicates what condition(s) ?
1. Excessive engine bleed air temperature.
2. Excessive engine bleed air pressure.
3. Excessive engine bleed air temperature and pressure.
4. Excessive engine bleed air temperature or pressure.
The TRIP RESET on the Bleed Air Panel will reset which condition(s) ?
1. PACK only.
2. BLEED TRIP OFF only.
3. WING-BODY OVERHEAT, PACK and BLEED TRIP OFF.
4. PACK, BLEED TRIP OFF and ZONE TEMP
What will cause illumination of the DUAL BLEED warning ?
1. The APU bleed air switch is ON and the number 1 engine bleed switch is ON.
2. The APU bleed air valve is open and the number 1 engine bleed switch is ON.
3. The APU bleed air valve is open and the number 1 engine bleed switch is ON or the
4. The APU bleed air switch is ON and either engine bleed air switch is ON with the Isolation
With the Isolation Valve switch in AUTO, what will cause the isolation valve to open ?
1. Positioning the engine bleed and pack switch to OFF on the same side.
2. Positioning either engine bleed and either pack switch to OFF.
3. Positioning either engine bleed or either pack switch to OFF.
4. Positioning the APU bleed valve to OFF.
What is the normal position of the isolation valve when the Isolation Valve switch is in AUTO ?
1. Open.
2. Closed.
Will the APU bleed valve open when the APU bleed switch is positioned to ON ?
1. Yes, regardless of whether the APU is operating or not.
2. Yes, but only if the APU is operating.
What is indicated if the AUTO FAIL warning light is illuminated on the Cabin Pressure panel with regard to the automatic controllers ?
1. A single controller failure.
2. Both controllers have failed if the MANUAL light is also illuminated.
3. Both controllers have failed.
If both the AUTO FAIL and MANUAL warning lights on the Cabin Pressurization panel are illuminated, what is indicated with respect to the automatic controllers ?
1. Both controllers have failed.
2. A single controller has failed and pressurization has been manually selected to the
3. Both controllers have failed and pressurization must be controlled manually.
4. A single controller has failed and pressurization has automatically switched to the operating controller.
What is indicated by the OFF SCHED DESCENT warning on the Cabin Pressurization panel ?
1. The aircraft has not reached the planned cruise altitude as set in the FLT ALT indicator.
2. The aircraft has descended before reaching the planned cruise altitude as set in the FLT ALT indicator.
3. The cabin rate of descent is excessive.
If the aircraft must return to the origin airport due to a malfunction, what is the landing altitude as programmed by the automatic controller ?
1. The altitude as set in the LAND ALT window.
2. The take-off airport elevation.
3. The cabin altitude as sensed by the controller before take-off.
4. The take-off airport elevation, but only if the FLT ALT indicator is reset.
What is the maximum altitude that may be set in the LAND ALT window on the Cabin Pressurization panel ?
1. 14,000 feet.
2. 10,000 feet.
3. 13,280 feet.
4. 9,600 feet.
What is the maximum altitude that may be set in the FLT ALT window on the Cabin Pressurization panel ?
1. 41,000 feet.
2. 42,000 feet.
3. 41,500 feet.
4. 50,000 feet.
How much time is required to drive the pressurization outflow valve through its full range using the manual control ?
1. 20 seconds.
2. 2 minutes.
3. 10 seconds.
4. 1 minute.
What is the source of barometric pressure used by the pressurization system automatic controllers ?
1. The Captain's altimeter.
2. The ADIRUs.
3. The left pitot static system.
4. The standby pitot static system.
Why is throttle position used by the automatic pressurization controllers ?
1. To pressurize the cabin at the start of the take-off roll when take-off thrust is applied.
2. To de-pressurize the cabin at lower power settings on the ground.
3. To regulate the amount of bleed air used for pressurization.
4. To initiate the cabin pressurization descent schedule at top of descent.
If the controller is not responding, the AUTO FAIL warning light on the Cabin Pressurization panel will illuminate if the cabin altitude exceeds: ?
1. 14,000 feet.
2. 15,800 feet.
3. 10,000 feet.
4. 15,000 feet.
If the controller is not responding, the AUTO FAIL warning light on the Cabin Pressurization panel will illuminate if the cabin differential pressure exceeds: ?
1. 8.75 psi.
2. 7.45 psi.
3. 8.45 psi.
4. 9.1 psi.
If the controller is not responding, the AUTO FAIL warning light on the Cabin Pressurization panel will illuminate if the cabin rate of descent or climb exceeds : ?
1. + or - 3000 fpm.
2. + or - 2000 fpm.
3. + or - 4000 fpm.
4. + or - 6000 fpm.
What is the maximum negative cabin pressure differential ?
1. .125 psi.
2. 0 psi.
3. 1.25 psi.
4. .25 psi.
What cabin altitude is the cabin regulated to at 41,000 feet ?
1. 8,000 feet.
2. 6,000 feet.
3. 10,000 feet.
4. 9,600 feet.
The source of bleed air is provided by ?
1. The 5th. stage of the compressor section.
2. The 9th. stage of the compressor section.
3. The 5th. stage of the compressor section augmented by the 9th. stage.
4. The 9th. stage of the compressor section augmented by the 5th. stage.
The engine bleed valve is operated by ?
1. A DC motor.
2. An AC motor.
3. A DC motor and bleed air pressure.
4. An AC motor and bleed air pressure.
The 5th. stage bleed air valve acts as a ?
1. pressure regulator and shutoff valve.
2. pressure shut off and modulating valve.
3. temperature regulator and shutoff valve.
4. bleed air pressure and temperature modulating valve.
The 9th. stage bleed air valve acts as a ?
1. pressure regulator and shutoff valve.
2. modulating and shut off valve.
3. temperature regulator and shutoff valve.
4. bleed air pressure and temperature modulating valve.
What is the function of the Trim Air switch ?
1. The Trim Air switch controls the trim air regulator and shutoff valve.
2. The Trim Air switch controls the trim air modulating valves.
3. The Trim Air switch controls the Zone Temperature Control.
4. The Trim Air switch controls the Flight Deck trim air modulating valve.
What is the function of the individual Zone Temperature controls ?
1. The Zone Temperature controls set the individual trim air modulating valves.
2. The Zone Temperature controls modulate the pack valves.
3. The Zone Temperature controls modulate the trim air pressure regulator and shutoff valve.
4. The Zone Temperature controls introduce warm air directly into the mix manifold.
Trim air is directly supplied from ?
1. engine bleed air.
2. the mix manifold.
3. the packs.
4. the recirc fans.
What is indicated by a CONT CAB ZONE TEMP warning light illuminated ?
1. A duct temperature overheat or failure of the Flight Deck primary and standby temperature control.
2. A duct temperature overheat.
3. A duct temperature overheat or failure of the Flight Deck primary or standby temperature control.
4. A duct temperature overheat or failure of the Flight Deck primary temperature control.
What is indicated by a CONT CAB ZONE TEMP warning light illuminated during Master Caution recall ?
1. Failure of the Flight Deck primary or standby temperature control.
2. Failure of the Flight Deck primary and standby temperature control.
3. Failure of the Flight Deck primary temperature control.
4. Failure of the Flight Deck standby temperature control.
What is indicated by a FWD CAB or AFT CAB ZONE TEMP warning light illuminated ?
1. A duct temperature overheat in the associated duct.
2. A duct temperature overheat or failure of the associated temperature control.
How may a FWD CAB or AFT CAB zone temperature control failure be determined ?
1. The associated ZONE TEMP warning light illuminates.
2. The Master Caution warning, AIR COND annunciator and the associated ZONE TEMP light illuminates.
3. The associated ZONE TEMP warning light illuminates during a Master Caution recall.
4. Both FWD CAB and AFT CAB ZONE TEMP warning lights illuminate.
Turning a Zone Temperature control to the OFF position
1. closes the associated trim air modulating valve.
2. sets the zone temperature to maximum cold.
3. closes the trim air pressure regulator and shutoff valve.
4. closes the trim air pressure regulator and shutoff valve and the associated trim air modulating valve.
A ZONE TEMP warning light caused by an overheat condition
1. closes the associated trim air modulating valve.
2. closes the trim air pressure regulator and shutoff valve.
3. closes the trim air pressure regulator and shutoff valve and the associated trim air modulating valve.
Will a pack continue to operate if both pack controllers for the same pack have failed ?
1. No, the pack valve automatically closes.
2. No, the pack will trip off and cannot be re-set.
3. Yes, the pack operates without control unless excessive temperature causes a pack trip.
4. Yes, the opposite standby controller will control the pack.
If both pack controllers have failed for the same pack, what indication will the crew have ?
1. The Master Caution light, AIR COND annunciator and PACK light illuminate.
2. The PACK light illuminates and the pack may be re-set to extinguish the light.
3. The Pack light illuminates and the Master Caution and AIR COND annunciator illuminate during a recall check.
If a PACK warning light cannot be extinguished with a re-set, what condition is indicated ?
1. Both controllers for that pack have failed.
2. The pack temperature control valve has failed open.
3. The pack temperature control valve has failed closed.
4. The primary pack controller has failed.
The primary and standby pack controllers receive their input from
1. the Zone Temperature controls and the left and right electronic controllers.
2. the primary and standby pack temperature control valves.
3. the pack temperature sensor.
4. the left and right ram air controllers.
In flight, with both RECIRC FAN switches in AUTO
1. the left recirculation fan operates if both packs are operating unless either PACK switch is in HIGH.
2. the right recirculation fan operates if both packs are operating unless either PACK switch is in HIGH.
3. the left recirculation fan operates if both packs are operating unless both PACK switches are in HIGH.
4. both recirculations fans operate regardless of the PACK flow rate.
On the ground, with both RECIRC FAN switches in AUTO
1. the left recirculation fan operates unless both PACK switches are in HIGH.
2. the left recirculation fan operates unless one PACK switch is in HIGH.
3. the right recirculation fan operates unless one PACK switch is in HIGH.
4. the left recirculation fan operates even if both PACK switches are in HIGH.

Air Conditioning and Pressurization 800/900