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M15 vid > 15.14 > Flashcards

15.14 Flashcards

1
Q

What are the system indicators used for

A

Monitor the operation of engine system e.g oil

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2
Q

What does EPR stand for

A

Engine pressure ratio

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3
Q

What are the unit for the level of engine vibration

A

From 0 to about 6

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4
Q

What does the EPR corresponds to

A

Engine thrust

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5
Q

Ho many engine vibration sensors are there on each engine and where are they located

A

There are 2, one in located in the compressor area and the other one is located in the turbine area

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6
Q

What are the two main type of oil pressure transmitter

A

The bourdon tube type

Strain Gauge type

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7
Q

What does EGT stand for

A

Engine gas temperature indication

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8
Q

What do fuel flow transmitter measure

A

The mass flow of fuel between fuel control unit and fuel nozzle

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9
Q

What are the performance indicators used fo?

A

Monitor the performance and the limit of the engine

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10
Q

What does EVMU stand for

A

Engine vibration monitoring unit

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11
Q

What can the maximum EGT indicators be

A

Between 600 and 900 degrees C

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12
Q

What does the fuel flow indicating system provide to the pilot

A

Actual fuel flow to the engines (kg or tones/hour)

Fuel used since engine start (kg or tons)

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13
Q

How do you calculate APU cal fuel quantity

A

Used fuel - fuel I tank at take off

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14
Q

What indication are used to monitor the correct operation of engine system

A

The secondary engine indicators

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15
Q

What can the engine indications be further divided into

A

Performance indications (primary)

System indicators (secondary )

Engine trend monitoring

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16
Q

What type of sensors re engine vibration sensors and what do they measure

A

They are accelerometer and they measure the radial acceleration of the rotor system

17
Q

What are the three main parts of a rotor speed indicator

A

The sensor
The data transmission
The indication

18
Q

What is engine trend monitoring

A

It is used on the ground to detect engine problems at an early stage

19
Q

What does thermodynamic analysis check

A

The pressure and temperature along the gas flow path

20
Q

What indicators can be used to give equivalent thrust values

A

> the rotational speed of fan {N1}

>engine pressure ratio

21
Q

What three parts does a EPR indication system have

A

Two pressure pickups
A computer
The indicator

22
Q

What can the the first sign of engine balance

A

Rotor imbalance

23
Q

What are the three different analyses that the engine data carries out ?

A

> thermodynamics
< mechanic-dynamic
oil consumption

24
Q

What does ACMS stand for

A

Aircraft Condition monitoring system

25
Q

What does TIT stand for

A

Turbine inlet temperature

26
Q

What does the mechanic dynamic analysis check

A

Any failure in the rotor system

M15 vid (15 decks)

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