Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GoJet CRJ-550 > Engines And General Knowledge > Flashcards

Engines And General Knowledge Flashcards

1
Q

What kind of engines power the CRJ-700?

A

2 General Electric CF34-8C5B1 High Bypass Turbofans.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the range of the CRJ-700?

A

Standard 1685 nm.

Extended 1985 nm.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the dimensions of the CRJ-700?

A

Height 24’10”.
Length 106’8”.
Span 76’3”.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the intake and exhaust danger areas?

A

Idle - Intake 13 ft exhaust 100 ft.

Maximum - Intake 26 ft exhaust 300 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What can be controlled from the flight attendant’s control panel?

A

Cabin lighting.
Emergency lighting.
Main passenger door.
Interphone system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the maximum speed and altitude of the CRJ550?

A

0.85 Mach.

41,000 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the minimum pavement width required for a 180 degree turn?

A

75 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the size of the APU exhaust danger area?

A

15 ft.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What emergency equipment is located behind the Captain’s and First Officer’s seats.

A

CA - Flashlight and PBE.

FO - Flashlight, crash axe and fire extinguiser.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How much thrust is developed by each engine?

A

12,670 lb at take-off.
13,790 at APR.
13,280 at MCT.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Decribe the major sections of the N1 and N2 spools.

A

N1 - Outer section including 1 large turbine and a 4 stage low pressure turbine.
N2 - Inner section including a 10 stage axial compressor and a 2 stage high pressure turbine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What components are located on the accesory gearbox?

A 
Oil pump.
Fuel pump.
Hydraulic pump.
FADEC alternator.
Integrated Drive Generator (IDG).
Fuel metering unit.
Air Turbine Starter.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the purpose of the N2 variable geometry?

A

To prevent compressor stall and surges.

It also improves overall efficiency.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How the is the N2 variable geometry operated?

A

Controlled by FADEC.

Fuel is used to actuate the vanes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Where is the N2 varibale gemoetry located?

A

On the first 4 stages of the N2 compressor.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the FADEC control?

A

Fuel control system.
Engine start and ignition system.
Compressor airflow.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How many chanels does each FADEC have and when do they operate?

A

Two, an A and B channel.
One channel is ‘in control’ the other is in standby.
Both channels simultaneously operate and share data but only the ‘in control’ channel provides actual engine commands.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

When does the FADEC’s standby channel provide commands to the engine?

A

In an engine overspeed condition. The result is an engine flame out then an auto relight once the N2 spools below a set threshold.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How is the FADEC powered?

A

Below 50% N2 RPM by the aircraft’s electrical system.

Above 50% N2 RPM by it’s own alternator driven by it’s onside engine.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

When does the FADEC stop updating the target thrust?

A

At 65 kt on take-off until 400 ft AGL or the thrust levers are taken out of the detent.

21
Q

What are the different N2 idle speeds?

A

Flight idle - In flight, gear up, flaps at 20 degrees or less.
Approach idle - In flight, gear down OR flaps greater than 20 degrees.
Landing idle - In between ground and reverse idle.
Reverse idle - Weight on wheels or wheel spin up, thrust reverser lever is raised and the engine reverser cowl is not stowed.
Ground idle - When on ground and thrust lever is in idle.

22
Q

What does the FADEC do in the event of an engine failure?

A

Depending upon thrust lever position:
In cruise - a proportional increase in N1 speed.
In climb detent - maximum continuous thrust.
In TOGA - APR.

23
Q

When does the FADEC detect an N1 speed mismatch?

A

When the N1 on each engine differ by 15%.

24
Q

When does the FADEC command APR to an engine?

A

When the difference in N1 is greater than 15%.

When thrust levers are in the MAX PWR detent.

25
Q

When will the FADEC synchronise N1 or N2?

A

When the SYNCH switch is selected to either N1 or N2 and the thrust levers are in the cruise range.
N1 must be within 1.5% of eachother and N2 must be within 2.5% of eachother.

26
Q

What is required for the FADEC to start the engine?

A

DC power and bleed air.

27
Q

During engine start, when does the starter motor cutout?

A

At 50% N2.

28
Q

When can the starter be reingaged after an aborted start?

A

At any N2 speed below 45%.

29
Q

Decsribe the engine ignition system for the engine?

A

Each engine has an A and B exciter. A is AC ESS BUS driver, B is DC BATT BUS battery driven through a static inverter.

30
Q

How is engine ignition activated?

A

Normally by FADEC.

Use of the continuous ignition switch.

31
Q

When does the FADEC switch off ignition during engine start?

A

At starter motor cutout (50% N2).

32
Q

When does continuous ignition automatically come on in flight?

A

During a stall.
Disruption in engine airflow.
During engine flameout.

33
Q

What does the engine operability valve do?

A

Opens when commanded to prevent a compressor stall.

34
Q

How is the engine fuel shutoff valve operated?

A

L or R ENG FIRE PUSH switchlight.

35
Q

How many fuel pumps are contained within the engine fuel pump unit?

A

Three. One draws fuel into the unit, one proiveds motive flow back out and one provides pressurised fuel to the engine.

36
Q

Where is the fuel temperature displayed on the EICAS measured?

A

Downstream of the fuel pump unit, and after passing through the fuel/oil heat exchanger.

37
Q

What is fuel coming from the fuel metering unit is used for?

A

Engine operation.
Variable geometry.
Operability valve.

38
Q

Where is bleed air obtained?

A

From the 6th and 10th stage of the high pressure (N2) compressor.

39
Q

What should happen if a thrust reverser is inoperative?

A

A thrust reverser lock-out plate should be correctly installed.

40
Q

What does the thrust lever position supply information to?

A 
FADECs.
Flight control computers.
Data concentrator unit.
Landing gear warning system.
Take-off configuration warning system.
Cabin pressurisation system.
Ground lift dumping system.
41
Q

What does pressing the TOGA buttons do?

A

Sends commands to the flight director and the flight management system.

42
Q

Starter re engagement is prohibited above?

A

45% N2.

43
Q

What happens if during start, the FADEC detects a failed igniter?

A

It will automatically switch to the other igniter after 15 seconds.

44
Q

During landing, when is maximum reverse thrust is prohibited?

A

Below 75 kt.

Reverse idle should be achieved by 60 kt.

45
Q

When does FADEC provide engine overspeed protection?

A

When N2 exceeds 107%.

46
Q

When does FADEC change in control and standby channels?

A

Every second start when N2 reaches 7%.

47
Q

When is APR power armed during take-off?

A

When N1 RPM are within 8% of the take-off N1 reference value.

48
Q

When is a FLEX take-off prohibited?

A 
Wing or cowl anti-ice is required.
Runway is contaminated.
Windshear warnings.
Anti-skid is inoperative.
Engine cannot produce full rated thrust.

GoJet CRJ-550 (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions