CRJ900 System Flashcards
The APU is located ….
Aircraft tail cone
Maximum APU start Altitude is …..
37,000
What is the bleed air source for the CRJ900 air conditioning system …
6th and 10 th Stage
The airspeed trend vector indicates the predicted airspeed in:
10 seconds
Selecting the RAM AIR switch OPEN supplies ram air to…
Mixing Manifold
The lavatory FireX Bottle is discharged by:
Heat sensitive capsules within the discharge tubes
The APU battery is a:
43 ampere hour, 24 volt battery
How is the Out-Flow Valve operated?
Electrically
What happens when the LH or RH ENG Fire PUSH switchlight is pushed?
Engine Fire bottle squibs are armed for the associated engine
HYD SOV closes
Answer = both A and C
How many Outflow valve(s) are installed in the CRJ900?
1
At FL4 0 the engine driven generators are rated at…
40 KVA
The CRJ900 TRU distribution system consists of…
4 TRUs rated at 120 amps each
DC Tie Contactors….
Are Controlled Automatically
Ice Detector switchlight illuminates amber to indicate aircraft entry into icing with:
Wing and Cowl Anti-Ice Off
What type of ejector pumps are used to move fuel from the center tanks to the main tanks?
Transfer Ejectors
How many circuit breaker panels are located on the flight Deck?
2
From the list below, identify the aircraft systems NOT protected by the dual-loop Fire detection system?
Cargo Bays
The engine Low Pressure Turbine….
Is protected by an overheat detection system only
How is the Fire Detection and Extinguishing system tested?
Automatically when the Test Button is selected
What is used to back up the main ejectors?
Two electric boost pumps
Maximum 45 slats/flaps VFE speed is…
170 KIAS
Hydraulic AC motor pumps B and 2B will automatically turn on during an engine failure
False
Lift dumping is accomplished by extending…
Two MFS panels and two Ground Spoilers per wing
The main battery is a:
17 ampere hour, 24 volt battery
There are two slat positions. The intermediate position of 20 degrees is set when the….
SLATS/FLAPS Lever is selected to 1 & 8
When the EMER FLAP switch is selected the ….
SLATS/FLAPS move to 25/20
The Rudder Travel Limiter (RTL) restricts rudder travel…
In flight only
The standby ISI is…
An integrated unit
The enhanced flight director provides optimal pitch reference…
When TO mode is active
When the aircraft is pressure refueled, the total usable fuel capacity for the CRJ900 is…
19,594 pounds
The APU Fuel Feed System uses…
Dedicated APU fuel pump
The APU in the CRJ900 gets its fuel from…
The left wing tank via the left Collector Tank
The bulk fuel temperature for the CRJ900 is measured in….
Right Wing Tank
The purpose of the HYD SOV switch is…
To stop the flow of HYD fluid to EDP 1A or 2A
The purpose of the HYD SOV switch is…
To stop the flow of HYD fluid to EDP 1A or 2A
What source of bleed air is used Anti-Icing?
6th or 10th Stage Bleed Air
What does the DET TEST switch light test when pressed?
Ice Dectectors and Air Data Probes and Sensor heaters
How is a Cowl Duct Leak detected?
Pressure Transducer
The maximum landing gear retraction and extension speeds for the CRJ900 are….
200 KIAS and 220 KIAS
The forward nose gear doors
Are mechanically connected to the landing gear lever
Bleed air is taken from what stages of the engine compressor?
6th or 10th Stages
How is bleed source selection controlled when in AUTO mode?
Automatically by the ACSC
What is the minimum batter voltage required for APU start?
22 volts
What is the purpose of the HPV?
To provide high pressure 10th Stage air as required
When the parking break is applied with all hydraulic systems OFF, will the breaks hold for a prolonged period of time?
Yes, but only the Inboard Brakes
The two safety valves on the aft pressure bulkhead provide:
Over pressure and negative pressure relief
CF34-8C5 Takeoff and APR thrust values are…
1 ,560 & 14,750
Engine N1 speed governing is a function of…
FADEC
The engines may be started using an air source from the APU, ground air cart or engine cross-bleed.
True
FLEX N is computed by the…
FMS Computer
Prior to takeoff, normal-rated takeoff N thrust is displayed….
Automatically
The CF34-8C5 thrust reverser system is operated by….
HYD Pressure
The automatic performance reserve system (APR) is armed when….
When the engine speed is within 8% N1 RPM of scheduled take off Power
Engine oil is cooled by:
Fuel/Oil Heat Exchanger
During an engine start, the starter cuts out at:
50% N2
Refilling of the engine oil may be accomplished by maintenance using the replenishment tank located in:
The aft equipment bay
The CRJ900 thrust lever quadrant is equipped with detents at …
CLIMB, MAX PWR, TOGA
All the above
An amber IDG Fault Switchlight and Caution message indicates:
Low IDG oil pressure and/or High IDG oil temperature
The APU AVAIL switchlight illuminates to indicate:
The APU is ready for electrical and/or pneumatic loading
During an engine start, what indications are needed before introducing fuel?
20% or greater N2 & ITT Less than 20°
Both a and b
Passenger oxygen masks will automatically deploy if the cabin altitude exceeds?
14,000
