Lubrication Systems

Front 1

What will be the result of operating an engine in extremely high temperatures using a lubricant recommended by the manufacturer for a much lower temperature

Back 1

The oil pressure will be lower than normal

Front 2

(1) gas turbine and reciprocating engines oils can be mixed or used interchangeably (2) most gas turbine engine oils are synthetic. Regarding the above statements

Back 2

Only No. 2 is true

Front 3

An Oil separator is generally associated with which of the following

Back 3

Engine driven vacuum pump

Front 4

The time in seconds required for exactly 60 cubic centimeters of oil to flow through an accurately carbureted orfice at a specific temperature is recorded as a measurement of the oils

Back 4

Viscosity

Front 5

Upon what quantity or characteristic of a lubricating oil is its viscosity index based

Back 5

Its rate of change in viscosity with temperature change

Front 6

Lubricating oils with high viscosity index ratings are oils

Back 6

In which the viscosity does not very much with temperature change

Front 7

Compared to reciprocating engine oils the types of oils used in turbine engines

Back 7

At less tendency to produce lacquer or coke

Front 8

Lol use in reciprocating engines has a relatively hi viscosity do to

Back 8

Large clearances and high operating temperatures

Front 9

If all other requirements can be met what type of oil should be used to activate theoretically perfect engine lubrication

Back 9

The thinnest oil that will stay in place and maintain a reasonable film strength

Front 10

In addition to lubricating ducing friction between moving parts engine oil performs what functions (1) cools (2) seals (3) cleans (4) prevent corrosion (5) cushions impact shocks loads

Back 10

1,2,3,4,5

Front 11

Which of these characteristics is desirable in turbine engine oil

Back 11

High flash point

Front 12

The viscosity of a liquid is a measure of its

Back 12

Resistance to flow

Front 13

What type of oil system is usually found on turbine engines

Back 13

Dry sump, pressure, and spray

Front 14

Which of the following factors helps determine the proper grade of oil to use in a particular engine

Back 14

Operating speeds of bearings

Front 15

Specific gravity is a comparison of the weight of a substance to the weight an equal volume of

Back 15

Distilled water at a specific temperature

Front 16

Which of the following has the greatest effect on the viscosity of lubricating oil

Back 16

Temperature

Front 17

What advantage do mineral based lubricants have / vegetable oil based lubricants when used in aircraft engine

Back 17

Chemical stability

Front 18

The Recommended aircraft engine lubricants R

Back 18

Mineral or synthetic based

Front 19

High tooth pressures and high rubbing velocities such as occur with spur type gears require the use of

Back 19

An EP lubricant

Front 20

Manufacturers normally required turbine engine oil servicing within a short time after engine shutdown primarily to enjoy

Back 20

Prevent over servicing.

Front 21

What type of oil do most engine manufactures recommend or new engine brake in

Back 21

Straight mineral oil

Front 22

What type of oil do most engine manufacturers recommend afternoon reciprocating engine breakin

Back 22

Ashless dispersant oil

Front 23

possible Failure related Ferrous-metal particles IN turbine engine oil Cause AN (electrical) indicating - type magnetic chip detector to indicate their presence by

Back 23

bridging the gap between the detector center (positive electrod) and the ground electrode

Front 24

what is the purpose OF the last Chance oil Filters ?

Back 24

To filter the oil immediately before it enters the MAIN benrmgs

Front 25

IN A Je+ engine Which uses A Fuel oil heat exchange, the oil tempertUreis controlled by A thermostatic Valve that regulates the Flow OF

Back 25

0il through the best exchanger

Front 26

what prevents pressure within the lubricating oil tank From rising Above or Falling beloW Ambient pressure (reciproCating engine ?

Back 26

oil tank vent

Front 27

in AN Axial - Flow tUrbine engiNe Compressor bleed Air is sometimes used to Aid in cooling the

Back 27

turbine Vanes blades And bearings

Front 28

oil picks up the most heat From which OF the FollowIng turbine Engine Components

Back 28

Turbine bearing

Front 29

which OF the FollowiNg is A Function OF the Fuel- oil heat exchanger ON A turbojet engine ?

Back 29

Increases Fuel temperature

Front 30

According to Federal Aviation Regulations oil tank FiHers on turbine engineS must be marked with the word

Back 30

oil

Front 31

oil tank Fillers ON reaporcating engines Are marked with the word

Back 31

oil in accordance with 14 CFR part 23

Front 32

After marking A Welded repair to A pressurized type turbine engine oil tank the tank Should be pressure checked to

Back 32

Not less than 5 psi plus the MAXimUm Operating Pressure OF the tank

Front 33

why Are Fixed orifice NOZZLES Used in the lubricating system OF GAS turbine engines ?

Back 33

To Provide a relatively constant oil Flow to the MAIN bearings As engines Speeds

Front 34

possible Failure related ferrous metal partiless in turbine engine oil Cause an electrical indicating type Magnetic chip detector to indicate Thier pressure by

Back 34

bridging the gap between the detector Center positive electrode And the ground electrode

Front 35

What would be the probable result it the oil system pressure relief Valve should stick in the open position ON A turbine engine

Back 35

Insufficient lubrication

Front 36

what is the primary purpose OF the oil to Fuel heat exchanger

Back 36

Cool the Oil

Front 37

What unit in AN aircraft engine lubrication system is Adjusted to maintain the desired system pressure

Back 37

oil pressure relief Value

Front 38

Low oil pressure CAN be detrimental to the internal engine Components How ever high Oil pressure

Back 38

Should be limited to the engine Manufactures recommendations

Front 39

What is the primary purpose OF the oil breather pressurization System that is used on turbine Engines

Back 39

provides A proper oil spray pattern From the Main bearing oil Jets

Front 40

The purpose OF directing bleed Air to the outer turbine Case ON some eNgines is to

Back 40

provide optimum turbine blade tip Clearance by controlling thermal expansion

Front 41

Some larger reciprocating engines use A CompeNSA+.'NG oil pressure relief Value to

Back 41

Provine A high engine oil pressure when the oil is Cold and Automatically lower the oil Pressure when the oil Warms UP

Front 42

IN order to relieve excessive pump pressure in AN engines internal Oil System most engiNes Are equipped with A

Back 42

relief Valve

Front 43

what is the Source OF most OF the heat that is Absorbed by the leubrtiatng oil a reaprotating engine

Back 43

protonS And Cylinders WALLS

Front 44

How Are He teeth of the gears in the Accessory section OF AN Engine Normally lubricated

Back 44

By splashed or sprayed oil

Front 45

what is the PurposeOF the check valve generally used IN A dry sump lubrication system

Back 45

To prevent the oil From the supply tank From seeping into the crankcase during Inoperative periods

Front 46

From the Following identity the Factor that has the least effect ON the oil Consumption OF A specific engine

Back 46

Mechanical efficiency

Front 47

From the Following indentify the Factor that has the least effect on the oil Consumption OF A Specific engine

Back 47

Mechanical efficiency

Front 48

How is the on collected by the Piston oil ring returned to the crankcase

Back 48

Through holes drilled iw the Piston oil ring groove

Front 49

which OF the Following lubrication system Components is Never located between the pressure pump and the engine pressure system

Back 49

Fuel line For oil dilution system

Front 50

As AN Aid to cold weather starting the oil dilution system thins the oil with

Back 50

Gasoline

Front 51

The basic oil pressure relief Value setting For a NewLY overhquled engine is MADE

Back 51

in The overhaul Shop

Front 52

Where is the oil temperature bulb located ON a dry Sump reciprocating engine

Back 52

oil inlet line

Front 53

Cylinder walls are Usually lubricated by

Back 53

splashed or sprayed oil

Front 54

IF an oil Filter element becomes completely Clogged the

Back 54

bypass valve Will open And the oil pump Will Supply Unfiltered oil to the engine

Front 55

oil accumulation in the cylinders OF AN inverted in line engine and in the lower cylinders OF A radial engine is normally reduced or prevented by

Back 55

extended Cylinders skirts

Front 56

What is the Primary purpose OF Changing Aircraft engine lubricating oils at predetermined periods

Back 56

The oil becomes Contaminated with moisture Acids And Finely divided suspended Solid particles

Front 57

what determines the minimum Particle size which Will be excluded OF Filtered be A Cuno-type Stacked disc edge Filtration Filter

Back 57

The spacer thickness

Front 58

what is the Primary purpose OF the hopper located in the oil Supply tank OF some dry sump engine installations

Back 58

to reduce the tome required to warm the oil to operating temperatures

Front 59

The Purpose of the Flow control Value iw A reciprocating engine oil system is to

Back 59

direct oil through or Around the oil cooler

Front 60

where Are Sludge chambers when used in Aircraft engine lubrication system usually located

Back 60

in the crankshaft throws

Front 61

Why is AN Aircraft reciprocating engine oil tank on a dry Sump lubrication System equipped with Avent line

Back 61

to prevent pressure build UP in the Oil tank

Front 62

Excessive oil prevented From Accumulating ON the Cylinders halls OF A reciprocating engine by

Back 62

oil Control rings on the PistoNS

Front 63

1.) wet sump oil SystemS Are most Commonly used ingots turbine engages 2) in most turbse engine ool tanks A slight pressurization OF the tank is desired to ensure A position Flow of Oil Regarding the Above statements

Back 63

Only NO.2 is true

Front 64

The pumping Capacity OF the Scavenger pump in A dry sump Aircraft engine 'S lubrication System

Back 64

is greater than the Capacity OF the oil Supply pump

Front 65

in which OF the Following Situations will the oil Cooler automatic bypass Value be open the greatest amount

Back 65

Engine oil below Normal operating temperature

Front 66

in order to mrtntrtw A son start oil pressure as the clearances between the moving parts OF AN engine increase through Normal wear the supply pump output

Back 66

remains relatively constant At a given RPM With less oil being returned to the pump inlet by the relief Value

Front 67

The Value Assemblies OF opposed reciprocating engines Are lubricated by means OF A

Back 67

pressure system

Front 68

what will result in an oil Filter becomes completely blocked

Back 68

oil will Flow At the NormAl rate through the system

Front 69

A turbine engine dry Sump lubrication system OF the self Contained high pressure design

Back 69

Consists OF pressure breather AND Scavenge subsystems

Front 70

Lube System last chance Filters in turbine Engines are usually Cleaned

Back 70

During Overhaul

Front 71

The vent line Connecting the oil supply tank And the engine in some dry SUMP engine installations permits

Back 71

the oil tank to be vented through the normal Engine vent

Front 72

An engine lubrication system pressure relief Value is usually located between the

Back 72

pump And the internal oil system

Front 73

where is the oil OF A dry Sump reciprocating engsve exposed to the temperature control Value sensing unit?

Back 73

oil Cooler inlet

Front 74

under witch OF the Following Conditions is the odd Cooler Flow Control Value open on A reciprocating engine?

Back 74

When the temperature OF the oil returning From the engine is too low

Front 75

The Purpose OF A relief Value installed in the TANK venting system of A turbine engine oil tank is to

Back 75

prevent oil pumpCAvitafion by maintaining A Constant pressure on the oil pump inlet

Front 76

in A reciprocating engine oil is directed From the pressure relief Value to the inlet side OF the

Back 76

pressure Pump

Front 77

IF the oil in the oil Cooler Core And Annular Jacket becomes Congealed What Unit prevents damage to the Cooler

Back 77

Surge protection Value

Front 78

The primary source of oil contamination in a normally operating reciprocating engine is

Back 78

Combustion deposits due to combustion chamber blow by an oil migration on cylinder walls

Front 79

A drop in oil pressure may be caused by

Back 79

Foreign material under the relief valve

Front 80

The main oil filters strain the oil at which point in the system

Back 80

Just as it leaves the pressure pump

Front 81

Which type valve prevents oil from entering the main accessory case when the engine is not running

Back 81

Check

Front 82

An oil tank having a capacity of 5 gallons must have an expansion space of

Back 82

2 quarts

Front 83

As a general rule a small amount of small fuzzy particles or grey metallic paste on a turbine engine magnetic chip detector

Back 83

Is considered to be the result of normal wear

Front 84

Why is expansion space required in an engine oil supply tank

Back 84

For oil in large mint and collection of foam

Front 85

The purpose OF A dwell chamber N A turbine engine oil tank is to provide

Back 85

Separation OF entrained Air From Scavenged oil

Front 86

Which OF the Following Kearns types most be Continuously lubricated by pressure oil

Back 86

plain

Front 87

The type of oil pumps most commonly used on turbine engines are classified as

Back 87

Positive displacement

Front 88

As a general rule the mixture setting on the reciprocating engine operating at or near take off power that provides the best cooling is

Back 88

Full rich

Front 89

The engine oil temperature regulator is usually located between which of the following on a dry some sump reciprocating engine

Back 89

the scavenger pump outlet in the oil storage tank

Front 90

What will happen to the return oil if the oil line between the scavenger pump and the oil cooler separates

Back 90

The return oil will be pumped overboard

Front 91

At cruise rpm some oil will flow through the really files of a gear type engine oil pump this is normal as the relief valve is set at a pressure which is

Back 91

Lower than the pressure pump capabilities

Front 92

(1) fuel maybe used to cool oil in gas turbine engines (2) ram air may be used to cool oil in gas turbine engine. Regarding the above statements

Back 92

Both no. 1 and no.2 are true

Front 93

In a reciprocating engine oil system the temperature bulb senses oil temperature

Back 93

At a point after the oil has passed through the oil cooler

Front 94

The oil dampened maine bearings utilize in some turbine engines is used to

Back 94

Provide an oil film between us how to raise and a bearing housing in order to reduce vibration tendencies in the rotors system and to allow for slight miss alignment

Front 95

What is the purpose of the last chance oil filters

Back 95

To filter the oil immediately before it enters the main bearings

Front 96

In a jet engine which uses a fuel oil heat exchanger the royal temperature is controlled by a thermostat valve that regulates the flow of

Back 96

oil through the heat exchanger

Front 97

What prevents pressure within the liver katie oil tank from rising above or falling below ambient pressure (reciprocating engine)

Back 97

oil tank vent

Front 98

in AN Axial - Flow turbine engine Compressor bleed Air sometimes is used cooling to Aid in the

Back 98

turbine)Vanes) blade) And bearings

Front 99

oil picks up the most heat From which OF the Following turbine engine Components

Back 99

Turbine bearings

Front 100

which OF the Following is a Function OF the Fuel-oil heat exchanger ON a turbine engine

Back 100

increases Fuel temperAtue

Front 101

According to Federal Aviation Regulations oil tank Fillers ON turbine engines must be marked with the word

Back 101

oil

Front 102

oil tank Fillers on reciproCatiNg Are marked with the word

Back 102

oil in accordance with 14 CFR part 23

Front 103

After Making A welded repair to A -pressurized type turbine engine oil tank the tank should be pressure checked to

Back 103

not leSs than 5 PSI plus the maximum operating pressure OF the TANK

Front 104

why are Fixed orific Nozzles Used IN the lubrication System OF gas turbine engines

Back 104

to provide A relatively Constant oil Flow to the MAIN bearings At all engines Speeds