Brainscape's Knowledge GenomeTM

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


See full index

CAA Module 15 > Module 15.10 Lubrication systems > Flashcards

Module 15.10 Lubrication systems Flashcards

1
Q

Lubrication systems distribute oil to what?

A
  • Bearing compartments
  • Gearboxes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where do wet sump engine lubrication systems store the oil?

A

In the engine

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

What do dry sumps use to store oil?

A

External supply tank

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

What are the two types of oil/lubrication systems?

A
  • Full flow
  • Constant pressure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The supply pump is driven by what rotor system?

A

N2 (High pressure turbine, which drives the accessory gearbox)

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

In full flow systems, oil pressure changes with what?

A
  • N2 rotor speed
  • Temperature
  • Flow area
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A leak in the oil system leads to what?

A
  • Decrease in pressure
  • Increase in the total flow area
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

On full flow, what would a pressure relief valve be installed between on the pump?

A

Between the delivery and the suction side

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

The constant pressure system is also called what?

A

Regulated pressure system

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

What valve type does a constant pressure system have?

A

Pressure regulating valve

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

What does the pressure regulating valve do?

A

Holds oil pressure at a given value at all N2 speeds from idle to full

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

Does oil temperature affect pressure in the constant pressure system?

A

No

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

Why is the full flow system most common?

A
  • Simple
  • No adjustments during maintenance
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the two disadvantages of full flow?

A
  • High oil pressure at idle
  • Significant rise in oil temperature at power reduction
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why is the exhaust turbine bearing a critical lubrication point?

A

High temperature

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

What is used to cool oil?

A

Oil coolers

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

What are aluminium alloy oil tanks coated with to give fire resistance?

A

Silicon

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

What are the two refilling methods?

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

What prevents discharge of oil and air if the cap is not fitted properly?

A

Check valve\

20
Q

Where does the scupper drain, drain oil to?

A

Engine drain mast

21
Q

What is the purpose of the scupper drain?

A

To catch spilt oil

22
Q

What is after the oil pump in the delivery system? and what is the safety feature?

A

Filter, with a pressure differential switch that operates a bypass valve

23
Q

After the filter, where does the oil flow?

A

First to the air cooled oil cooler, then to the fuel cooled oil cooler

24
Q

What are the filters after the heat exchangers called?

A

Last chance filters

25
Q

What are the two most common types of oil pumps?

A
  • Gear-type
  • Gerotor-type
26
Q

The gear type oil pump has what two elements?

A
  • One for pressure oil
  • One for scavenging
27
Q

A gerotor pump’s scavenge capacity can be controlled by what?

A

Varying the size of the elements (this is a design thing)

28
Q

The pressure regulating valve is located on what side of the pump?

A

Pressure side

29
Q

When is the relief valve especially important?

A

When there are oil coolers in the system, as these can be easily ruptured

30
Q

Where are the screens installed?

A

In the supply lines upstream of oil nozzles

31
Q

If an oil cooler is in the supply line it is called what?

A

Hot tank system

32
Q

If the cooler is in the scavenge lines, what is this system called?

A

Cold tank system

33
Q

Why does the scavenge oil have air in it?

A

As it has been sprayed on too components

34
Q

Where does scavenge oil return to?

A

Oil tank

35
Q

What is the purpose of the breather?

A

System venting

36
Q

\what separates air from the scavenge oil?

A

De-aerator

37
Q

What does the oil indication subsystem monitor?

A
  • Pressure
  • Temperature
  • Quantity
  • Condition
38
Q

What are the two types of transmitter used?

A
  • Capacitance type
  • reed switch type
39
Q

How does a reed type transmitter work?

A

Movement of a float, gives a varying resistance

40
Q

What can be said about the magnetic chip detectors?

A

Manually checked and some are electronically monitored

41
Q

What happens to resistance when particles connect with the magnet on the magnetic chip detector?

A

Decreases

42
Q

What is SOAP?

A

Spectrometric Oil Analysis Program

43
Q

What can SOAP analysis find?

A

Particles in oil too small to be caught in filters

44
Q

Oil quantity should be checked when?

A

Specified intervals (every time it lands)

45
Q

On engines without anti-siphon it is important to check oil at how long after engine shutdown?

A

5-20 mins

46
Q

After opening oil cap, if there is fuel smelt what does this indicate?

A

Leakage in fuel cooled oil cooler

CAA Module 15 (18 decks)

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