Testbank Flashcards
(140 cards)
[AC PRESS] On AEW aircraft, the #2 EDC is devoted to:
The RADAR compartment
[AC PRESS] Following a successful EDC disconnect, you should observe the following indications:
Loss of I/D spread and EDC press low light.
[AC PRESS] The Air Cycle Cooling System heat exchanger coils are cooled by ram air in flight and by air from electrically driven fans powered by _________ on the ground.
Bus B and MEDC “Mon DC”
[AC PRESS] Modulation of the __________ controls pressurization in the flight station and cabin.
Outflow valve
[AC PRESS] Cabin air is drawn through the electronics compartments by the cabin exhaust fan and exhausted overboard through the outflow valve. Power is furnished to the fan through which buses?
BUS B and Extended MDC
[AC PRESS] If the cabinet exhaust fan were to fail or there was a lack of airflow, which light would illuminate in the flight station?
“FAN OUT” light
[AC PRESS] Positioning the EDC DUMP switch to the dump position will:
Dump the EDC output overboard and close the Firewall shutoff valve.
[AC PRESS] With the APU not operating while taxiing, placing the Ground Air Conditioning Switch to on will:
- Undump EDCs
- Open firewall shutoff valves
- Close the aux vent
- Energize blower fans
[AC PRESS] (T/F) On takeoff, once the aircraft weight is off the wheels, scissor-switch action deenergizes the ground air-conditioning switch that secures power to the heat exchanger fans.
TRUE
[AC PRESS] The ______ isolate the EDCs from the air cycle cooling system.
Firewall shutoff valves
[AC PRESS] On LRT aircraft, the #2 EDC provides conditioned air to the:
Flight Station and Cabin
[AC PRESS] Indications of an EDC quill shaft failure are:
Loss of I/D needle spread without “PRESS LOW” light
[AC PRESS] The _____ system modulates the outflow valve to limit exhaust airflow and maintain cabin pressure equivalent to the altitude selected on the pressurization controller.
Isobaric
[AC PRESS] Which of the following lights indicates a closed thermal switch sensing an overheat condition at the output side of the air cycle machine compressor, and that temperature in the affected duct has exceeded safe limits.
REFER OVERHEAT
[AC PRESS] What actions occur as a result of placing the AUX VENT switch to open while in flight?
The AUX vent valve opens fully
The EDCs are dumped
Firewall shutoff valves close
The outflow valve opens electrically
[AC PRESS] A pressure relief valve under the copilot seat prevents dangerous buildup of cabin pressure in the event of a malfunction of the _____ system.
Differential
[AC PRESS] A negative presssure relief valve is located in the center of the aft pressure bulkhead. It will open if ______.
Outside (ambient) pressure exceeds cabin pressure.
[AC PRESS] Which of the following best describes the EDC oil cooling system?
An oil-to-oil heat exchanger is coupled to the engine oil cooling system.
[AC PRESS] The APU AIR OVERRIDE switch used in conjunction with the ground air-conditioning switch, allows the:
EDCs to be used for air conditioning when the APU is operating.
[AC PRESS] The outflow valve switch has four positions (open, close, auto and off). The switch controls the outflow valve as follows:
Close - Electrically drives the outflow valve to full-closed position, decreasing cabin altitude
Open - Electrically drives the outflow valve to full-open position, releasing cabin exhaust and depressurizing the aircraft.
Auto - Electrically drives the outflow valve to a midrange position, allowing the cabin pressure controller to pneumatically control the position of the outflow valve in either isobaric or differential range.
[AIRFRM / HYD] There are three electrically driven, variable displacement type hydraulic pumps that are constantly monitored for pressure output, fluid and motor temperature, and electrical control. A low-pressure warning is initiated when pump output falls to _____.
1800 psi
[AIRFRM / HYD] During an approach with the power levers below flight start (48 degrees coordinator), the landing gear warning horn should sound and the flashing wheels light should illuminate if the airspeed drops below _____ or if the flaps are selected to _____ with the landing gear up.
153 KIAS; Land
[AIRFRM / HYD] A full #2 Hydraulic reservoir will indicate how many gallons?
1
[AIRFRM / HYD] Hydraulic system #1 includes a DC motor-operated pump (1B) that is used primarily for _________ .
Charging the brake accumaltor