Module 3 lubricating systems

Question 1

What are the functions of lubricating oils perform ?

Answer 1

Reduce friction 
Seal
Cushion 
Clean 
Protect against corrosion 
Absorbs heat

Question 2

Do engine lubricates oil eliminate friction ?

Answer 2

No- provides a thin supporting film between parts

Question 3

What’s a viscosity?

Answer 3

Resistance to flow

Question 4

What method of testing is used to determine viscosity in aviation?

Answer 4

Say bolt test

Question 5

What is the flash point of an oil ?

Answer 5

Temperature at such ignitable vapor is produced

Question 6

Name types of oil systems

Answer 6

Splash
Pressure
Spray

Question 7

An oil with no additive used for engines break-in is?

Answer 7

Mineral oil

Question 8

Multi viscosity 10W30 w stands for?

Answer 8

Suitable for cold weather operations

Question 9

SAE 15W50 the 50 stands for ?

Answer 9

The higher viscosity of the oil when is hot

Question 10

What are the advantages of an Ashlees-dispersent oil

Answer 10

Prevents ash deposits which can lead to spark plug fouling and preignition

Anti-wear
Anti-foam

Question 11

Oil systems

Answer 11

Wet-sump

Dry-sump

Question 12

In addition to a pressure pump, the dry sump system has a _____________ pump

Answer 12

Scavenge

Question 13

What is the purpose of the hopper in the dry sump system?

Answer 13

Engine oil operation temperature quicker

Question 14

When oil should be diluted?

Answer 14

Immediately before engine shut down.

For oil dilution, only engine oil affected

Question 15

What is meant by the oil pour point ?

Answer 15

Lowest temperature at which it flows or can be poured

Question 16

A constant displacement pump is use in which pump systems

Answer 16

Used in both Dry and Wt sump systems

Question 17

Before adjusting the oil pressure you must?

Answer 17

Check the accuracy of the oil pressure gauge

Question 18

A spin-on semi-depth filter is design to used how many times?

Answer 18

Once

Question 19

The Lycoming 0-320-A2B engines uses what type of oil sump?

Answer 19

Gear type, constant displacement

Question 20

What is the purpose of the engine oil cooler

Answer 20

Remove the heats absorbs by the oil

Question 21

Under what operating does must wear occurs?

Answer 21

During the start up and warm up

Question 22

The engine oil filter should be checked for ?

Answer 22

Contaminants
Ferrous iron metal particles
Shinny non-ferrous particles
And bronze

Question 23

Operating a wet sump engine to high oil supply will result in ?

Answer 23

Oil discharge out the engine breather

Question 24

What is the function of the oil cooler bypass valve

Answer 24

As the oil heats up the thermostatic (by pass valve ) closes forcing the oil flow trough the oil cooler

Question 25

Oil system maintenance

Answer 25

• Checking oil levels -daily
• Oil filter replacement-100 hours or at oil change
• Oil change- as required by manufacture instructions
• Relief valve adjustment-as required