Lubricants And Fuels

Question 1

What are the tasks of a lubricant

Answer 1

Lubrication

Cooling

Cleaning

Corrosion protection

Question 2

How does a protective film work

Answer 2

Reduces friction and wear

The heat of materials is transferred to the oil i cooling

Question 3

What is viscosity

Answer 3

Resistance in a fluid to flow

Question 4

What is fluidity

Answer 4

The opposite to viscosity

Question 5

What are the two types of oil

Answer 5

Synthetic and mineral

Question 6

Where is synthetic oil used

Answer 6

Jet engine

Question 7

Where is mineral oil used

Answer 7

Piston engines

Question 8

What type of synthetic fuel is used on modern aircraft

Answer 8

type 2

Question 9

What type of fuel is used on special aircraft and why

Answer 9

Type 3 because it has higher thermal stability and viscosity at higher temperatures

Question 10

What are the downsides to synthetic oil

Answer 10

Price

Skin irritation

Not always mixable

Question 11

What is volatility

Answer 11

Measure of ease liquid converts into vapour

Question 12

How are factors affecting performance offset

Answer 12

Additives used to improve performance and impart new properties

Question 13

Most used fuel in Europe and freezing point

Answer 13

JetA1

-47

Question 14

Most used fuel in USA and freezing point

Answer 14

Jet A

-40

Question 15

Where is JETB used and what’s its flash and freezing point

Answer 15

Military

-20 and -58

Question 16

JP5 flash and freezing point

Answer 16

65 and -48

Question 17

What’s essential when handling fuel

Answer 17

Bonding and ground equipment is essential

Question 18

Where can you never fuel aircraft

Answer 18

In hangar

Question 19

What’s the requirements for jet fuel

Answer 19

Low freezing point and flash point

Low enough for ignition capabilities and high enough for safe handling

Question 20

What are 3 precautions in regards to heat sources

Answer 20

No naked flames

No smoking

No refuelling while engines running

Question 21

What’s the need for tank access socks

Answer 21

Minimise damage to the inside of fuel tank

Question 22

When entering tank what needs to be outside

Answer 22

Gas measuring equipment set up outside

Question 23

What is a category 1 tank

Answer 23

Direct access door for head and shoulders only

Question 24

What is a category 2 tank

Answer 24

Direct access door for complete body

Question 25

What is different to a category 3 door compared to 1 and 2

Answer 25

No direct access door however internal opening which is wide enough for rescue

Question 26

Why would mechanical cutters be required for category 4 fuel tank

Answer 26

Not wide enough for rescue