Lubrication

Question 1

__________ _____ is better at keeping particles in suspension (break in point)

Answer 1

Mineral Oil

Question 2

When starting in cold temperatures, what could you do to decrease the viscosity of the oil?

Answer 2

Pre-Heat Oil Fuel Dilution

Question 3

_______ is a liquid’s resistance to flow

Answer 3

Viscosity

Question 4

Viscosity is measured using a _________ ___________ _____________

Answer 4

Saybolt Universal Viscosimeter

Question 5

________ _______ is the temperature at which the chemicals normally suspended in the oil begin to solidify/separate into crystals

Answer 5

Cloud Point

Question 6

______ _____ is the temperature at which oil emits fumes

Answer 6

Flash Point

Question 7

______ _____ is the temperature where there is enough fumes for combustion

Answer 7

Fire Point

Question 8

Mineral Oil tends to _______ when heavily contaminated

Answer 8

sludge

Question 9

More commonly used oil are ____________ ____________ oils

Answer 9

Ashless Dispersant

Question 10

_______-_________ oils allows operation in a wide temp range

Answer 10

Multi-Viscosity

Question 11

_____ sump oil system is where most oil control elements are contained within the engine

Answer 11

Wet

Question 12

_____ sump oil system is where oil is stored outside the engine in a tank, and requires a scavenge pump

Answer 12

Dry

Question 13

What type of pump is usually used to deliver oil to the pressure system?

Answer 13

Constant displacement EDP

Question 14

The pressure relief valve can be ___________ or ________

Answer 14

adjustable fixed

Question 15

How is an adjustable pressure relief valve actuated?

Answer 15

Spring with a ball/dome

Question 16

How is a fixed pressure relief valve actuated?

Answer 16

Adding/removing washers

Question 17

What kind of oil filters are there?

Answer 17

Full flow, bypass/partial flow

Question 18

In an engine during a cold start, before oil comes to temperature, how is the oil kept from the cooling system?

Answer 18

Oil is bypassed around the cooler using a bypass valve (vernotherm valve). Then as the valve heats up, it expands and closes.

Question 19

Oil separator is used with which kind of air pumps?

Answer 19

Wet-type

Question 20

Large Radial engines use this system, adding small amounts of fuel to the oil before shutdown, allowing for less viscous oil for the next startup in cold temperatures.

Answer 20

Oil dilution sysem

Question 21

Other aircraft engines use ___-________ to heat up oil

Answer 21

Pre-heaters

Question 22

What does oil provide for engines?

Answer 22

Sealing, cooling, cleaning, actuation, corrosion prevention, lubrication

Question 23

The Higher the number on the oil part number =?

Answer 23

Thicker fluid/High viscosity fluid

Question 24

In Multi-Viscosity Oils, what does the first number represent?

Answer 24

Viscosity at Low temperatures

Question 25

What kind of bypass valves are there for an oil cooler?

Answer 25

Pressure, temperature

Question 26

What is the most common type of oil pump?

Answer 26

Gear pump

Question 27

When do you use Mineral oil?

Answer 27

During the break-in period if an engine