CRJ900 Systems Questions Flashcards
Maximum APU bleed air extraction altitude is
25,000 FT
What is the maximum available steering with using only the rudder pedals
8 degrees
Which of the doors are not depicted on the EICAS DOOR synoptic page
- Crew escape hatch
2. Aft equipment door
The 5 rechargeable battery packs provide power to the emergency lights for
10 minutes
“Too Low Gear” will sound with the landing gear retracted and radar altitude
< 500 AGL and < 190kts
The ADG (Air Driven Generator) is rated at
15KVA, 115V(AC), 400Hz
What is the main function of the IDG
Convert variable N2 speed to constant 12000 rpm
What are the TRU’s rated at
120 amps
How much thrust is provided from the bypass air (N1)
80%
The outflow valve has ____ electric motors
3
The FADAC alternator will supply electrical power to both channels above
50% N2
What is the maximum altitude operating with a single PACK
FL 31,000
____ provide lateral control with assistance of the MFS’s
Ailerons
The maximum fuel capacity using gravity fueling is
14810 lbs
The passenger oxygen system provides ____ minutes of oxygen
13
In icing conditions, the ice detector probes will heat up for ____ seconds during a ____ second period
5
60
There are ____ smoke detectors in the FWD cargo compartment and ____ smoke detectors in the AFT cargo compartment
3
2
The outboard brakes are supplied by
Hydraulic system 2
The FADAC will not provide protection for… (During an engine start)
Dry motoring
During a normal start, the start will cut out at
50% N2
How is a cowl duct leak detected
Pressure transducer
Hydraulic pumps 1B and 2B will operate when
- There respective buses are powered
- Any generator operating
- Flaps out of zero degrees
When operating in icing conditions and both wing and cowl anti-ice is selected on, the ICE caution message will become green ICE advisory message when
Wing leading edge is greater than 39c
With the APU door open and the APU not operating, maximum airspeed is restricted to
220 kts
How many outflow valve(s) are there
1
The APU battery is rated at
43 ampere hour, 24 volt
During engine start, FADAC will provide protection for
Hot Start
Hung Start
The nose wheel steering system provides ____ degrees of steering
80
How many APU start attempts can be made in 1 hour
3 (Two minute delay between each try)
Visible moisture can be defined as
- Fog (1 mile or less)
- Standing water
- Rain
- Snow
- Sleet
- Ice crystals
In a PCU runaway situation (bungee breakout) the SSCU will provide
automatic onside MFS control
The total fuel capacity using pressure refueling is
19,594 (7492 each wing, 4610 center)
The maximum fuel imbalance for takeoff is
300 lbs
The purpose of the HYD SOV switch light is
to stop the flow of Hydraulic fluid to EDP 1A or 2A
Regarding cargo bay fire protection, the large fire bottle will deplete slowly over
60 minutes
The maximum load capacity for the main passenger door is
- 1000 lbs
2. 4 People
The minimum battery voltage for an APU start is
22 volts
What is the purpose of the HPV
to provide high pressure 10th stage bleed air if required
When will the APR (Automatic Performance Reserve) activate on takeoff
During an engine failure and FADAC senses a mismatch of 15% N1 between two engines
During emergency power (ADG) hydraulic pump
3B will turn on automatically regardless of switch position
The engine fuel temperature must be ____ or warmer for takeoff
5c
The engine fire bottles are pressurized to ____ psi with dry nitrogen
600
The core air provides approximately ____% of the thrust
20
How many types of aural WARNINGS are provided to the flight crew
10
The rudder is powered by ____ PCU’s
3
Is the Yaw Damper controlled by the auto pilot system
No it’s controlled by the fcc
The fire protection system is powered by the
DC emergency BUS
The AVAIL illumination on the AC External Power switch light indicates
Correct voltage, frequency, and phase
In flight what situation will cause the ADG to auto-deploy
Complete loss of AC Bus 1 and 2
Complete loss of AC power
The three subsystems of the FADAC consists of
- fuel control
- compressor airflow management
- engine starting / ignition control
If the ground valve fails to fully close after the main cabin door is closed an ____ message is displayed
OVBD COOL
Maximum pressure relief differential is
8.7 psi
A CABIN ALT warning with “Cabin pressure” aural warning will be generated when the cabin altitude exceeds
10,000 ft
The green line on the airspeed tape indicates
1.27 Vs (not accurate at high altitudes)
Engine oil is cooled by
Fuel/Oil heat exchanger
With the horizontal stabilizer in motion for more than ____ the clacker will sound
3 seconds
The weather radar danger area when in the “ON” position is
2 ft
The highest priority when trimming the horizontal stabilizer is
The captain
In order captain, fo, autopilot, Mach trim
The APU fuel source comes from the
Left collector tank
The pressurization system automatically pre-pressurizes the aircraft to
-150 ft
