15.10

Question 1

What does the lubrication system do?

Answer 1

Distributes oil to engine bearing compartments and gear boxes

Question 2

Most gas turbine engines are what type of lubrication system?

Answer 2

Self contained dry sump lubrication system

Question 3

Supply filter is located where compared to supply pump?

Answer 3

Downstream

Question 4

What does the scavenge system do?

Answer 4

Returns oil from bearing compartment and gear boxes to oil tank

Question 5

The scavenge system prevents accumulation of lubrication oil where?

Answer 5

Gear boxes
Bearing compartments

Question 6

Bearing compartments have a vent line to do what?

Answer 6

Release sealing air

Question 7

The vent air leaves the engine where?

Answer 7

At rear of engine

Question 8

How many scavenge pumps are there per line?

Answer 8

1

Question 9

The oil measuring system does what?

Answer 9

Measures and indicates oil quantity, oil pressure and oil temperature

Question 10

What are mechanical clogging indicators also called?

Answer 10

Pop out indicators

Question 11

The engine interface unit sends measurements to where?

Answer 11

Cockpit

Question 12

An additional pressure switch is used in engine oil system to initiate what?

Answer 12

A low oil pressure warning

Question 13

The engine low oil pressure warning is always accompanied by what?

Answer 13

Acoustic warning

Question 14

Two main types of temperature sensor

Answer 14

Thermocouple
Thermistor

Question 15

What is SOAP?

Answer 15

Spectrometric oil analysis program

Question 16

The SOAP process is used why?

Answer 16

To find find out about internal wear of lubricated engine components

Question 17

The scavenge oil filter element catches larger particles which are of a size no more than what?

Answer 17

0.015mm

Question 18

Why are magnetic chip detectors preferred?

Answer 18

Easier and less time consuming method to gain info about oil condition

Question 19

How does an electrically monitored chip detector work?

Answer 19

Installed in scavenge oil lime
Two magnets, one at each end
Resistance between two magnets is monitored by electronic control unit
Resistance decreases when particles connect with the magnets

Question 20

Oil quantity can be checked where?

Answer 20

Sight gauges on oil tanks of engines
Or ecam and eicas displays

Question 21

Two methods of oil refilling?

Answer 21

Gravity- when oil cans are used
Pressure-when oil servicing system is used

Question 22

When a magnetic chip detector is removed what happens to the check valve?

Answer 22

It closes to prevent oil leakage

Question 23

Two seals on magnetic chip detectors?

Answer 23

Reusable seal
O ring