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M15 GTE > Engine Indication > Flashcards

Engine Indication Flashcards

1
Q

What are performance indicators

A

Monitor performance limits on engines and set thrust flight phases

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2
Q

What are system indicators

A

Monitor operation of engine systems such as oil or fuel

Detect malfunctions

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3
Q

What is engine trend monitoring

A

Done on ground to detect engine problems at every stage

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4
Q

What does an engine trend monitoring system use

A

Parameter’s automatically recorded by Acms

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5
Q

Is it possible to measure thrust directly

A

No

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6
Q

2 ways we find the value of thrust

A

Rotational speed of fan (N1)

Engine pressure ratio

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7
Q

What do engine system indicators do

A

Monitor correct operation of engine systems

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8
Q

What do the indications for oil system monitor

A

Oil quantity , oil pressure and oil temperature

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9
Q

Where are warnings and cautions showed

A

Displayed on ECAM/EICAS

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10
Q

How is engine trend monitoring showed

A

ACMS provides print-out for cockpit printer

Transmit the data via ACARS

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11
Q

What does thermodynamic analysis check

A

Pressured and temps along gas flow path

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12
Q

What failures does mechanic dynamic check

A

Failures in rotor system , does this by checking vibration and rotor speed signals

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13
Q

What does the oil consumption analysis do

A

Generates signal when oil consumption reaches a certain level

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14
Q

What’s the N1 indication

A

Low pressure rotor

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15
Q

N2 indication

A

High pressure rotor

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16
Q

N3 indication

A

Engine has 3 rotors

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17
Q

How are engine rotor speed indications expressed

A

Percentage of 100% design speed

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18
Q

Speed indication parts

A

Sensor

Data transmission

Indication

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19
Q

3 parts of epr indication

A

Indicator in cockpit

Computer

Two pressure pickups connected by tubes with computer

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20
Q

Max EGT indications

A

600-900 degrees C

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21
Q

Where is highest EGT temp

A

Directly behind combustion chamber

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22
Q

Turbine inlet temperature

A

Higher then 1400 degrees C

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23
Q

Why is EGT measured from colder location

A

turbine inlet temperature can be too hot

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24
Q

What gears are in a hydraulic torque meter

A

Sun and planet gears in epicyclic gear assembly

25
Q

What do helical cut teeth do in a hydraulic torque meter

A

Transmit increasing axial thrust

26
Q

Where are two concentric shafts in electronic torque meter

A

Between engines & gear box

27
Q

What does the inner shaft do in electronic torque meter

A

Powers transmitting shaft

28
Q

Where is outer shaft connected to in electronic torque meter

A

Attached to inner shaft at rear end

29
Q

What’s the 3 clock types

A

Clock type scale

Moving vertical bar

Electromechanical indicator

30
Q

What do the clock type indicators do

A

Show EGT in degrees C in analog and digital

31
Q

What is a red line

A

Max EGT that shouldn’t be exceeded

32
Q

What is amber line

A

Max EGT for max continuous thrust setting , can only be exceeded during take off and go around thrust

33
Q

What is the relationship between EGT AND TIT

A

Direct relations

34
Q

What indication is vibration

A

Secondary indication

35
Q

How does the cockpit show vibration

A

Vibration level in Units 0-6

36
Q

What is EVMU

A

Engine vibration monitoring unit aka the computer

37
Q

What’s component is a vibration sensor

A

Accelerometer that measures radial acceleration of rotor system

38
Q

Where are the two vibration sensors

A

One in compressor

Seconds in turbine area

39
Q

How is vibration indication controlled

A

Automatically by monitoring unit

40
Q

How does ECAM generate 2 indications

A

From single sensor

41
Q

What happens when fwd sensor fails on ECAM

A

Switches to aft

42
Q

How many modes of indication does EICAS use

A

4 modes

43
Q

What is BB

A

broadband which is a unfiltered vibration signal

44
Q

How is actual fuel flow measured (unit)

A

Kg or tons per hour

45
Q

How is fuel used since engine started measured

A

Kg or tons

46
Q

What generates fuel flow and fuel used

A

Fuel flow transmitter

47
Q

What does a fuel flow transmitter do

A

Measures mass flow of fuel between control unit and fuel nozzles

48
Q

How does fuel flow transmitter get its force measurement

A

Acceleration of fuel done by an impeller

49
Q

Two types of oil quantity transmitter

A

Capacitance and reed switch

50
Q

Where is oil pressure transmitter connected to

A

Oil supply line & oil tank vent line

51
Q

Two types of oil pressure sensor

A

Bourbon tube and strain gauge

52
Q

What is engine low oil pressure warning accompanied with

A

Acoustic warning

53
Q

Two types of oil temperature sensor

A

Thermo couple

Thermistor

54
Q

Where is oil temperature sensor found

A

Scavenge system

55
Q

What does scavenge system check

A

Hot oil temperature upstream of oil cooler

56
Q

What does pressure system check

A

Temperature of cooled oil

57
Q

What is soap

A

spectrometric oil analysis program

58
Q

What size particles does soap find

A

0.001-0.02mm

M15 GTE (19 decks)

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