Aircraft Systems

Question 1

Avgas used for?

Answer 1

Piston engines a/c or internal combustion engines a/c

Question 2

Avtur and avgas equals

Answer 2

Avtag

Question 3

Avtag is known as what’s? Avtur and gasoline

Answer 3

Wide cut fuel

Question 4

Avcat is avtur and diesel used together and is used on?

Answer 4

Carriers

Question 5

Avtur FSII stands for?

Answer 5

Fuel system icing inhibitor

Question 6

Avcat with fsii is used on?

Answer 6

Carriers

Question 7

Name the fuel system,

Answer 7

Fuel from main tank to collector tank by jet pump.

Question 8

What is cross feeding?

Answer 8

Cross feed is when one tank feeds more than one engine

Question 9

How do we move fuel from one tank to another?

Answer 9

Fuel transfer.

Question 10

What colour are fuel warnings and cautions?

Answer 10

Red and amber

Warnings and cautions

Question 11

What side is in the low pressure side of the airframe?

Answer 11

LP pump, LP fuel cock

Question 12

Most commonly used fuel in gas turbine engines

Answer 12

Aftur or avtur fsii

Question 13

Flash point of fuel is?

Answer 13

Lowest temp at which fuel can combust

Question 14

What happens if you close the LP fuel cock?

Answer 14

Prevent fuel reaching the engine.

Question 15

Parts of an engine?

Answer 15

Intake, compressor, combustion chamber, turbine, exhaust

Question 16

Brayton cycle?

Answer 16

Induction, compression, combustion, exhaust. Compression goes up with pressure axis

Question 17

Turbo fan engine is driven by what?

Answer 17

Low pressure turbine at the rear. It’s the last turbine and it drives the fan. It extracts sufficient energy from the gas to drive the fan

Question 18

2 types of compressor

Answer 18

Centrifugal and axial

Question 19

Centrifugal

Answer 19

Cheap
Easy to make
Low maintenance 
Small mass flow rates
Large frontal area
Air flows radially in the compressor 
Usually single stage 
86% efficient

Question 20

Turbo prop

Answer 20

Gas turbine driving a propellor. Uses max energy from gas to drive propellor.

Question 21

Propellor propulsive efficiency

Blue line is turbo prop

Answer 21

Blue line is turbo prop

Question 22

Turbo prop drops off at 350 kts why?

Answer 22

Shockwaves at the tips.

Question 23

Stall is what?

Answer 23

A partial breakdown of airflow through the compressor

Question 24

Surge?

Answer 24

A total breakdown of airflow through the compressor

Question 25

Purpose of oil filter?

Answer 25

To remove debris from system

Question 26

Boundary lubrication?

Answer 26

Surfaces are kept in contact

Question 27

Hydrodynamic lubrication?

Answer 27

Layers are apart

Question 28

Oil tank is what

Answer 28

Main storage for oil

Question 29

Boundary layer lubrication appears where?

Answer 29

Start up

Question 30

Left of fuel pump is low px right is high px

Answer 30

.

Question 31

High pressure system components include?

Answer 31

Throttle valve FCU, HP shut off valve and one other

Question 32

Bleed air used for?

Answer 32

Starting engines, cabin heating, cooling, pressurisation

Question 33

Purpose of engine oil system?

Answer 33

To lubricate main bearings

Question 34

Rpm monitored on?

Answer 34

Phonic wheel

Question 35

Tachogenerator measures?

Answer 35

Engine speed

Question 36

Materials should be?

Answer 36

High strength Low cost Light Easy to make

Question 37

Design lidimit?

Answer 37

Max lod the designer would expect an airframe to experience in service

Question 38

Wing structure

Answer 38

Ribs, rear spa are the 2 answers

Question 39

Wing loading?

Answer 39

Loads on the wing from manoeuvre and the pay load. Payload and G is wing loading

Question 40

Name 3 wing positions?

Answer 40

See pic

Question 41

Empenade?

Answer 41

.

Question 42

All flying tail plane?

Answer 42

Used on heavy cargo aircraft

Question 43

Canard

Answer 43

A full plane and reduces drag trim at high speed

Question 44

Tail plane on tornado?

Answer 44

Taileron for pitch and roll

Question 45

V type tail plane is for

Answer 45

Pitch and yaw

Question 46

Secondary flying controls?

Answer 46

Lateral axis elavators Normal axis Longitudinal axis

Question 47

Horizontal stabiliser

Answer 47

All flying tail plane as whole angle of attack can be changed

Question 48

Fire detection system is to

Answer 48

Detect fire or accessible heat

Question 49

Areas detectors in

Answer 49

Cargo holds baggage areas, engines

Question 50

Spot detectors

Answer 50

Anywhere that could get hot. All over the place.

Question 51

Fire warning

Answer 51

Visual and audible warning

Question 52

Problems common in what areas?

Answer 52

High electrical areas.

Question 53

Fire wire?

Answer 53

Steel tube with inner wire. Both are charged. If the insulating material gets heated up they make the circuit

Question 54

Fuel leaks IVO hit equipment

Answer 54

.

Question 55

Correct ground de icing procedure

Answer 55

Clear off snow etc, then start spraying de icer

Question 56

Identify a wing icing probe

Answer 56

Stick out side of a/c wing

Question 57

Where is air taken from for anti icing?

Answer 57

Bleed air from the compressor.

Question 58

Stress is?

Answer 58

Load per area unit of cross section

Question 59

Strain is?

Answer 59

Deformation caused by stress

Question 60

Stiffness or rigidity is?

Answer 60

Ratio of stress over strain.

Question 61

Design load limit is?

Answer 61

Maximum load the designer would expect an airframe to experience in service.

Question 62

High wing?

Answer 62

Enables ease of cargo loading

Question 63

Mid-wing?

Answer 63

Low RCS

Question 64

Low wing

Answer 64

Shorter undercarriage, crash protection