Brainscape's Knowledge GenomeTM

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


See full index

Uh 60m > Engine SYS - 2 > Flashcards

Engine SYS - 2 Flashcards

1
Q

The EDECU will display a torque signal of?

A

25%

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

what is the connection between NP and NR?

A

1way mechanical connection via the freewheeling unit

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

what function of DEC keeps NP at 100%?

A

NP governing

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

how do you manually turn off starter?

A

pull down on PCL

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

3 modules of engine

A

cold, hot, power turbine, accessory

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

How does the cockpit receive the NG signal?

A

from the NG winding of the alternator

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

how does DEC get power?

A

primarily through alternator

secondary through AC airframe power

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

Where does the engine receive its electrical power?

A

Engine Alternator

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

describe load demand system

A

provides mechanical input directly from the collective

output flight control mixer to the engine HMU to reduce transient engine and NR droop.

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

Alternator windings (3)?

A

NG speed, DEC power, ignition power

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

cabin heat is provided how?

A

sce/ht switch to engine

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

When does the DEC go into 2.5min limiting?

A

when torque of one engine is 50% below the other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

3 main functions of DEC

A

NP governing, torque match, single fault validation, hot start prevention,

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

The pneumatic start system (EPU) uses air turbine engine start motor for?

A

engine starting

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

oil holds ___
Has to be __________ for flights more than 6 hrs
______ for flights less than 6 hrs.

A

7quarts
at the full line
above the fill line

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

How does eng. oiling occur?

A

liquid to liquid cooler, oil from the scroll vanes

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

When will fuel flow be automatically be shut off to the engine during the start sequence (hot start prevention)

A

when TGT reaches 900c,

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

what controls air/fuel mix?

A

hmu through fuel scheduling

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

Oil from the chip detector passes through the oil cooler and is cooled by?

A

transferring heat from the oil to fuel

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

if NG signal is lost, what happens?

A

engine out warning light and audio 0% NG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

where is the oil drawn from in an emergency

A

sumps a and b

22
Q

Overservicing is not possible because oil will?

A

flow out the filler port

23
Q

What are are the 2 operational sections of the engine?

A

NG and NP

24
Q

primary functions of ODV

A

Hot start prev
Fuel purge
fuel sequencing/12 injectors
Overspeed shuts off (120%)

25
Q

fuel flow process? _ _ _ _ _ _

A

pump, fuel filter, HMU, liquid to liquid cooler, ODV, nozzles

26
Q

TGT will be indicated on the Power Pod when?

A

TGT > 793
Difference of 75* or more
Eng out (NG <55%)

27
Q

torque affected with anti ice on how?

A

up to 20% of torque loss and additional 5% with heater on

28
Q

what does ODV do?

A

sequences fuel and sends to the injectors (last part of fuel).
NP overspeed protection (120% +-1)
purges fuel on shut down

29
Q

Hot start prevention? a function of the ___ and __ that ___ prevents over temp during starts by shutting down the engine

A

DEC

ODV

30
Q

compressor stall?

A

loud popping/banging accompanied by a rapid increase in TGT and fluctuations in NG ! and P

31
Q

Other than bleed air, what is used to assist in the engine anti-ice function?

A

hot engine oil provides passive anti ice

32
Q

what circuit in the DEC is not powered by the alternator?

A

HSP

33
Q

Is the NG mechanically linked to the NP?

A

No

34
Q

when is eng inlet anti-icing system avail?

A

4c and below it must activate. may not be active 4-13 and must not be avail 13c and above.

35
Q

The HMU operates what part of the compressor section?

A

Variable guide vanes

36
Q

What drives LRU accessories on gearbox?

A

gas generator (at varying speeds)

37
Q

what controls 3 variable geometry fins in engine?

A

HMU

38
Q

NG governing is influenced by what input to the HMU?

A

T2 Sensor

39
Q

When does NG appear on power pod?

A

When NG exceeds 100%
less than 55% eng out
difference of 5%

40
Q

how is the generator turbine connected to the accessory gear box

A

mechanically

41
Q

When will TGT limiting not work?

A

lockout
compressor stall
start up

42
Q

what drives the accessory gearbox?

A

gas generator at a varying speed

43
Q

What controls electrical function of the engine and transmits systems information to the cockpit?

A

DEC

44
Q

What section of the engine mechanically drives NR?

A

NP

45
Q

what operation section of the engine drives the rotors?

A

NP (power turbine) (it is a one way freewheeling unit)

46
Q

DEC is powered by __ primarily and ___ secondary

A

Alternator

Aircraft power

47
Q

What drives NP governing?

A

DEC ODV

48
Q

How many stages in the compressor section?

A

5 axial, 1 centrifugal

49
Q

How does the oil system overcome high oil pressure during cold starts?

A

oil bypass

50
Q

the ____ provides added protection from heat-seeking weapon systems by mixing hot exhaust with rotor downwash

A

UES

51
Q

The engine alternator supplies AC power to what?

A

The ignition exciter and DEC/EDECU and the NG signal to cockpit

Uh 60m (14 decks)

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