Lubercation Recip

Question 1

What six functions of the lubercation system in a recip engine

Answer 1

Reduces friction 
Seals and cushions 
Removes heat 
Cleans the engine
Protects from corrosion 
Performs hydraulic functions

Question 2

What is is called when two parts are separated by oil and their is friction

Answer 2

Internal friction

Question 3

When the engine is at sit for long periods of time it should be protected with what type of oil

Answer 3

Preservative oil

Question 4

What is viscosity

Answer 4

Resistance of a fluid to flow

Question 5

What is the measurement of viscosity

Answer 5

Saybolt seconds univseral viscosity

Question 6

What is viscosity index

Answer 6

A measure for the change in viscosity of an oil as it changes temperature. The higher viscosity index the less viscosity change.

Question 7

How is specific gravity normally specified

Answer 7

American petroleum institute

Question 8

What is flash point

Answer 8

Temperature of the oil when it gives off enough vapor to ignite and flash, but not continue to burn.

Question 9

What is fire point

Answer 9

Temperature to which the oil must be heated for the vapors to ignite and burn continuously

Question 10

How do you test color

Answer 10

By comparing it to the American society of testing materials

Question 11

What is residue

Answer 11

It is carbon build up

Question 12

What are the six type of recip lubercating oils

Answer 12

Straight mineral
Detergent
Ashless-dispersant 
Multi viscosity 
Synthetic 
Semi synthetic

Question 13

What is straight mineral oil used for

Answer 13

They are used for the break in cycle after and engine has been overhauled

Question 14

What is coke

Answer 14

Solid carbon residue left when all volatile parts of mineral oil have been evaporated

Question 15

What is detergent oil

Answer 15

Helps prevent sludge and varnish build up unsuitable for aircraft engines

Question 16

What is Ashley’s dispersant oil used for

Answer 16

It’s used for everyday oil for recip engines

Question 17

What does AD oil do

Answer 17

It helps contains containments and prevent blockage

Question 18

Are synthetic oil suitable for recip engines

Answer 18

No

Question 19

What is the first number is 20w50 stand for

Answer 19

The cold that the viscosity can handle

Question 20

What does the w mean in 20w50

Answer 20

Winter use also

Question 21

What does the 50 mean in 20w50

Answer 21

It’s viscosity can go to 50

Question 22

What is extreme pressure lubricant used for

Answer 22

It is used in high pressure areas where metal can be in contact with each other very easily

Question 23

What are the two types of lubercation systems

Answer 23

Wet sump

Dry sump

Question 24

What is the sump

Answer 24

A low point in an aircraft engine in which the oil collects and stored or from which the engine pumps from

Question 25

What are the types of ways oil can be dispersed unto a moving part

Answer 25

Splash
Spray
Pressure feed

Question 26

What is a thermostatic valve used for

Answer 26

It controls the temperature of the oil in the aircraft engine. This is the component that decides whether oil goes into the cooler or into the engine

Question 27

Where is the oil cooler in a dry sump engine instillation is install between

Answer 27

Scavenger pump and the oil tank

Question 28

How is the crankcase allowed to let the expanding gasses get out of the case

Answer 28

By the case breather which is connected to a line that dumps it overboard

Question 29

How is the oil pressure maintained in the lubercation system

Answer 29

Pressure relief valve

Question 30

What happens when the temperature is low

Answer 30

The thermostatic bypass valve is open

Question 31

Which pump has the greater capacity scavenger or pressure

Answer 31

Scavenger

Question 32

How would a lubercation system pump be best described

Answer 32

Constant-displacement pump

Question 33

What are the two types of pumps In the lubrication system

Answer 33

Spur gear

Gerotor

Question 34

What does the pressure relief valve do in a lubrication system

Answer 34

It maintains a constant pressure in the lubrication system as the engine speed changes.

Question 35

What are the basic types of oil filter arrangements

Answer 35

Full flow

By pass

Question 36

What are the far requirements for airworthiness standards for aircraft engines

Answer 36

FAR 33

Question 37

Where are bypass filters installed

Answer 37

Parallel with the bearings and it only filters a little at a time not all at once

Question 38

What are the different type of lubrication filters

Answer 38

Surface(wire screen)
Edge( spiral wound/ cuno)
Depth( fiberous mat)
Semi depth( pleated Fiber)

Question 39

How do you check a semi depth filter

Answer 39

Cut the filter out and check the pleated fiber inside

Question 40

What components make up the oil cooler

Answer 40

Thermostatic flow control valve
Cooler core
Cooler jacket
Check valve

Question 41

What does the thermostatic flow control valve do

Answer 41

It is the controlling factor whether oil needs to pass through the oil cooler first or can by pass around against the cooler jacket

Question 42

What is the surge protector valve used for in the oil cooler

Answer 42

To protect from con chilled oil from entering the oil cooler and causing a clog

Question 43

What must the cap for luberication always be marked with

Answer 43

Oil

Question 44

What is the requirements to FAR part 23

Answer 44

Oil tanks must have an expansion space of at least 10% of the tank capacity
The tank must also be vented to the engine crankcase from the top of the expansion space

Question 45

What stops the oil from running constantly into the engine

Answer 45

Spring loaded check valve

Question 46

What function does a hopper perform

Answer 46

To Hasten the warm up of engine oil in the tank

Question 47

How do you dilute the oil in recip engines

Answer 47

With gasoline

Question 48

What is used to constantly monitor the oil over a period of time

Answer 48

Spectrometric oil analyst