Engine

Question 1

What type of engine is on the E175

Answer 1

GE CF34-8E5

Question 2

The engine produces maximum power from _____ lbs up to _______ lbs on the reserve mode (RSV) at ISA conditions

Answer 2

13,800 lbs up to 14,200 lbs

Question 3

The five sections of the engine are:

Answer 3

Cold section
Accessory gearbox (AGB)
Combustion liner and stage 1 nozzle assembly
High pressure turbine (HPT)
Low pressure turbine (LPT)

Question 4

A single low pressure fan is driven by a _____ stage low pressure turbine.

This is represented by what on the EICAS?

Answer 4

four stage

N1

Question 5

A ___ stage axial flow compressor with variable geometry inlet guide vanes and stator vanes are driven by a ___ stage high pressure turbine.

This is represented by what on the EICAS?

Answer 5

10 stage driven by a 2 stage

N2

Question 6

What is mounted on the AGB?

Answer 6

Electric alternator (IDG)
Hydraulic pump

Question 7

The ITT is measuring the temperature in what part of th engine?

Answer 7

Around the low pressure turbine

Question 8

Fuel Flow is measured where in the engine?

Answer 8

In the fuel control unit

Question 9

How many fuel injectors are installed on each engine?

Answer 9

18

Question 10

The fuel control is managed by the _____

Answer 10

FADEC

Question 11

The max fuel schedule limits the fuel into the engine to protect against: (3)

Answer 11

Engine speed
Temperature
Compressor discharge pressure (CDP)

Question 12

(T/F) The FADEC will switch from channel A to B and from B to A after every successful engine start, assuming normal operation of the systems

Answer 12

True

Question 13

The main purpose of the oil in the engine is ___

Answer 13

Lubricate the engine bearings

Lubricate the AGB bearings

Question 14

The FADEC ignites ___ starter(s) for ground starts and ___ starter(s) for inflight engine starts

Answer 14

1 on the ground, both in flight

Question 15

(T/F) When the ignition is placed into OVRD all 4 igniters are activated.

Answer 15

True

Question 16

Igniters 1B and 2B are connected to _____

Answer 16

SPDA2

Question 17

The FADEC will deactivate the igniters automatically under what conditions?

Answer 17

• Engine shutdown
• ## Ignition knob set to OFF during dry motoring on ground

Question 18

(T/F) If you select the ignition to OFF in flight the igniters will shutoff and the engine will shutdown

Answer 18

False. The FADEC disregards an OFF setting in flight

Question 19

(T/F) If a flameout is detected the FADEC will automatically start both igniters and a FAIL message will appear in N1

Answer 19

True

Question 20

During an engine start the FADEC controls: (3)

While the aircraft controls: (4)

Answer 20

FADEC:

• Fuel flow
• Starter command
• Ignition command

Aircraft controls:

• Starter control valve
• Hydraulic engine driven pump
• Switches power to ignition exciters
• Manages bleed system interface

Question 21

FADEC deactivates the starter control valve (SCV) at approximately ___% N2 and turns the ignition off

Answer 21

~50% N2

Question 22

The FADEC commands the ignition to ON at approximately ___% N2

Answer 22

~7% N2

Question 23

The fuel metering valve opens at approximately ___% N2

Answer 23

~20% N2

Question 24

In an air start the fuel metering valve will automatically open if the FADEC hasn’t detected the N2 to reach ___% after ___ seconds

Answer 24

20% N2 after 15 seconds

Question 25

(T/F) The FADEC has no protection for hot starts, hung starts or failure to light-off for in-flight engine starts.

Answer 25

True

Question 26

During an in-flight engine start, if no light off is detected within ___ sec. after fuel flow is started, the start should be manually aborted

Answer 26

30 seconds

Question 27

The FADEC start protection logic provides protection from:

It only provides this with a ________ detection

Answer 27

• Automatic hot start protection
• Hung start protection
• No light-off protection

It only protects when it detects weight on wheels

Question 28

The hot start protection will terminate the start when ITT rises above ___C during a ground start. It does this by ______ and ______

Answer 28

815C

Closing the fuel metering valve and shutting off the ignition

Question 29

If the N2 drops below ____% during an auto relight after a flameout, the start lever should be moved to OFF to abort the automatic restart attempt

Answer 29

7%

Question 30

During ground operations, auto relight attempts are terminated and fuel is shut off if the engine RPM falls blow ___% N2

Answer 30

52%

Question 31

(T/F) With an inoperative engine, the inoperative engines thrust reverse can’t be selected on landing

Answer 31

True

Question 32

Automatic takeoff thrust control system(ATTCS) provides engine thrust reserve (RSV) in the event of: (3)

Answer 32

Engine failure during takeoff
Go-around
Windshear warning detection

Question 33

Pulling the emergency shutdown lever stops:

Answer 33

Fuel flow
Hydraulic flow
Pneumatic air flow

Question 34

The N1 Wing Anti Ice bug (WAI) indicates the ____ (min/max) value when the wing anti ice is on and the aircraft is in the ______ phase

Answer 34

Minimum required in the final approach phase

Question 35

(T/F) The maximum N1 value will always be lower than the N1 redline

Answer 35

True

Question 36

REV in red with an EICAS message ENG X REV DEPLOYED means what?

Answer 36

A reverser deployed inadvertently in air

Question 37

For the LP Vibration indicator the
Green range is from ____ to ____
Amber from ____ to ____

Answer 37

Green from 0 to 3.9

Amber from 4 to 5

Question 38

(T/F) It may be normal to get a high vibration reading with all other engine parameters indicating normal operation

Answer 38

True