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Core 2 > 1-9 > Flashcards

1-9 Flashcards

1
Q

Purpose of engine lubrication systems

A

provide adequate supply of clean oil to bearings and gears at right temperature and pressure

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2
Q

Types of engine lubricating systems

A

Wet Sump and Dry Sump

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3
Q

Wet Sump

A

stores oils in gearbox. Used on centrifugal flow engines

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4
Q

Dry Sump

A

Stores oil in tank external of engine. Larger supply of oil.Primarily for axial flow

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5
Q

Reservoir Tank

A

Stores systems oil supply

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6
Q

Vent controls

A

air pressure in tank to ensure a constant supply of oil to main oil pump

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7
Q

Deaerator

A

Seperates air from oil returning to oil tank

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8
Q

Oil Level Transmitter, Dipstick, or

A

Sight Gauge

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9
Q

Has a Coarse

A

Mesh screens

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10
Q

has various

A

oil and air inlets and outlets

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11
Q

Pressure relief valve

A

limits maximum system pressyre where valves open and returns excess oil to inlet side of pump

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12
Q

Check Valve

A

allows flow in one direction only

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13
Q

Bypass valve

A

allows fluid to flow in alternate direction if clogged

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14
Q

Lubrication System Pump Purpose

A

Create flow to a volume of fluid

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15
Q

System lubrication pumps

A

Pressure and Scavenger

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16
Q

Pressure pump

A

delivers flow of oil to points of lubrications under constant volume

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17
Q

Scavenger Pump

A

Returns oil from engine bearing and gear cavities back to tank

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18
Q

Types of normal pumps

A

Gear Type and Gerotor Pump

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19
Q

Gear pump

A

dual or multi element with pressure relief valve

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20
Q

Gerotor Pump

A

Single, Dual, or multi element with pressure relief valve

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21
Q

Lubrication System Filters Purpose

A

Removes contamination from lubricants

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22
Q

System Filter Types

A

Cartridge Filter
Screen
Screen Disk

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23
Q

Cartridge Filter is

A

periodically removed and replaced

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24
Q

Screen filter can be

A

cleaned and reused

25
Q

Screen Disk Filter can be

A

Cleaned and reused

26
Q

Lubricating system heat exchangers purpose

A

reduce temperature of oil by transmitting heat from oil to another fluid

27
Q

Types of heat exchangers

A

Air/Oil

Fuel/Oil

28
Q

Lubrication Jets(nozzles) purpose

A

direct oil onto bearings and/or gears.

Mist or soild spray

29
Q

oil pressure transmitter purpose

A

senses oil pressure in lubrication system.

sends signal to cockpit. PSI

30
Q

Oils(Liquids)

A

Used as lubricant and must be free flowing

31
Q

What prevents oil from flowing

A

Viscosity

32
Q

Petroleum based lubricating oil

A

used on reciprocating piston engines. graded to identify series and viscosity of oil

33
Q

Synthetic based lubricating oil

A

capable of withstanding higher operating temperatures and high bearing speeds

34
Q

petroleum and synthetic oil cannot be

A

mixed

35
Q

Oil used in most gas turbine engines is

A

MIL-L-23699. NATO symbol is O-156

36
Q

Geases(SemiSolid)

A

Stable and free from bleeding, non corrosive, and waether and water resistant

37
Q

General Purpose Greases is used for

A

wheel bearings, and where compatibility with rubber is required

38
Q

Extreme High Temp Grease is used for

A

High speed applications such as ball or roller bearings

39
Q

Molybdenum Disulfide (Moly-B) grease is used on

A

sliding steel surfaces

40
Q

the PON-6 pre oiler provides

A

pressurized, filtered oil for servicing.

41
Q

the PON-6 preoiler is a

A

self-contained, hand-operated 12 quart system.

42
Q

the PON-6 pre oiler provides

A

pressurized, filtered oil for servicing.

43
Q

the PON-6 preoiler is a

A

self-contained, hand-operated 12 quart system.

44
Q

When handling any chemicals or hazardous liquids

A

follow the correct procedures and use appropiate PPE

45
Q

Ensure chemicals and hazardous liquids are placed

A

in authorized disposal containers

46
Q

Two factors dictate procedures for disposal. These are:

A

Type and Location

47
Q

Main engine bearing purpose

A

support compressor and turbine rotors and allow them to rotate freely.
3 - 7 main bearings are required

48
Q

What determines amount of bearings required?

A

Length and Weight of engine and number of rotors

49
Q

Accessory Bearing purpose

A

absorb loads created by drive shafts and gears

50
Q

Accessory bearing located in

A

accessories and gearboxes

51
Q

Ball Bearings are used on

A

compressor and turbine rotor shafts.

52
Q

Ball bearings absorb both

A

radial and axial loads

53
Q

Roller Bearings are used in areas of

A

high centrifugal force and absorb radial loads only

54
Q

Bearings are made up of:

A

Inner and outer race
cage
Bearing(roller or ball)

55
Q

Oil seals purpose

A

Prevent oil from escaping its normal path of flow

56
Q

Labyrinth Seal

A

Non-rubbing surface designed to allow minimal leakage

57
Q

Labyrinth seal leakage is controlled by

A

engine bleed air (air pressure) on one side

58
Q

Thread seal

A

oil seal that uses reverse threading and centrifugal forced

59
Q

Carbon seal

A

spring loaded carbon seal mated with machined surface(rotating seal), which creates the seal.

Core 2 (5 decks)

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