Systems Questions Flashcards
The APU is located in the…
Aircraft tailcone
Maximum APU start altitude?
37,000 feet
What is the bleed air source for the CRJ 900 air conditioning system
6th and 10th stages
How is the air conditioning pack pressure controlled on the CRJ 900 when the engines are supplying bleed air?
Pack valves
Selecting the RAM AIR switch OPEN supplies ram air to?
Mixing manifold
What is the STDBY selection on the DISPLAY FAN control panel provide on the CRJ 900?
De-energizes the flight and ground fans
How is the outflow valve operated?
Electrically
How is the avionics bay exhaust air controlled on the CRJ 900?
Ground valve
How many outflow valves are installed on the CRJ 900?
1
At FL 410 the engine driven generators are rated at?
40 kVA
CRJ 900 TRU distribution system consists of…
4 TRUs rated at 120 amps each
The DC tie connectors are controlled…
automatically
During single generator operations the following bus(es) are load shed
No buses are load shed
How many circuit breaker panels are located on the flight deck?
2
From the list below identify the aircraft systems not protected by a dual loop fire/overheat.
Cargo, it is protected be smoke detectors.
The engine low-pressure turbine…( fire protection)
Is protected by overheat detection system only
How is the fire detection and extinguishing (FIREX) system tested?
Pilot selected
Flutter dampeners are provided on
Ailerons only
Maximum 45 slats/flaps VFE speed is…
170 kts
The MFS are powered by how many hydraulic systems?
1 on each side by one system.(Messed up question but the final answer is one)
Lift dumping is accomplished by extending…
2 MFS panels per wing, 2 ground spoilers per wing; total eight
There are two slat positions. The intermediate position of 20° is set when the
SLATS/FLAPS lever is selected to 1 and 8
When the EMER FLAP switch is selected the…
Slats/flaps move to 25/20
The RTL restricts rudder travel…
In flight only
The standby ISI is…
An integrated standby instrument
The enhanced flight director provides optimized pitch reference…
When the TO mode is active
When the aircraft is pressure refueled the total usable capacity of the CRJ 900 is…
19,594 lbs
The APU fuel feed system use a…
Dedicated APU fuel pump
The APU on the CRJ 900 gets fuel from…
The left wing tank via the left collector tank
The bulk fuel temperature for the CRJ 900 is measured in the…
Right wing tank
The purpose of the HYD SOV switch light is…
Stop the flow of hydraulic fluid to EDP 1A or 2A
What is the source of the bleed air used for anti-icing?
6th or 10th stage bleed air
What does the DET TEST switch test when pressed?
Ice detectors, air data probes and sensor heaters
“ADS heat test okay” message will be displayed on that EICAS
Message will change from yellow to green
How is a cowl leak detected?
Pressure transducer
The maximum landing gear retraction and extension speeds for the CRJ 900 are…
200 KIAS & 220 KIAS
The forward nose gear doors…
Remain open when the nose gear is extended
Bleed air is taken from which stages of the engine compressor?
6th or 10th stages
How is the bleed source selection control when in the AUTO mode?
Automatically by the ACSC
How is the interlock protection provided for the APU?
ACSC control logic provides two levels of protection
What is the purpose of the HPV?
To provide high-pressure 10th stage air as required
On the ground with both engines running and the APU operating what bleed air source is supplying the manifold?
APU
The ACSC logic always chooses the APU when its running to avoid having engines and APU pushing air into the manifold.
When is the bleed leak detection system monitored?
Continuously when powered
CF34–8C5 takeoff and APR thrust values are_____&_______ft lbs.
13,560 and 14,750
Engine N1 speed governing is a function of…
FADEC
N1 & N2 synchronization is available during…
Cruise
FLEX N1 Is computed by…
FMS computer
Prior to takeoff Normal rated takeoff N1 thrust is displayed…
Automatically
The CF34-8C5 thrust reverser system is operated by…
Hydraulic pressure
The automatic power reserve system (APR) is armed when…
When the engine speed is within 8% N1 RPM scheduled takeoff power
FADEC will automatically abort an engine starts for all malfunctions detected.
False
Engine oil quantity monitoring and servicing is…
Via the EICAS MENU page and oil replenishment system in the aft equipment bay.
When an engine failure is detected, APR thrust occurs when…
A. Thrust levers are in TOGA detent.
B. Normal, FLEX, or Go-Around power is programmed.
The CRJ 900 thrust Lever quadrant is equipped with detents of…
MAX POWER, TOGA, CLIMB, IDLE, SHUT OFF
How many hydraulic pumps are needed to operate each spoiler?
1
What message do you get after pressing the DET Test button?
ADS HEAT TEST OK
CRJ 700/900 Aircraft uses what electrical power?
115 volt AC and 28 volt DC electrical power.
How many electric motors control the out flow valve?
3
