AGK day 3

Question 1

If you lose one of the hydraulic system what should you do

Answer 1

Open the power transfer

Question 2

If anything goes wrong what do you do

Answer 2

Check list

Question 3

What is a single acting actuator

Answer 3

Convert hydraulic pressure into movement

Question 4

What is a non return valve

Answer 4

Maintain flow direction in a single direction

Question 5

How non return valves kept being non return

Answer 5

Different hole sizes

Question 6

What are the two types of system on a hydraulic system

Answer 6

Passive and active

Question 7

How does a closed centre system work

Answer 7

Maintains a constant supply that constantly pumps around the system

Question 8

What is the hydraulic reservoir

Answer 8

Store for hydraulic fluid

Question 9

Why is the hydraulic reservoir pressurised

Answer 9

As you increase the altitude the rate of evaporation increases but pressurisation stops this

Question 10

Why is nitrogen used in accumulators

Answer 10

It does not combust

Question 11

How may application of brakes can you use on the accumulator

Answer 11

6 applications

Question 12

What is EDP

Answer 12

Engine driven pump

Question 13

What drives hydraulic pumps

Answer 13

The accessory gearbox

Question 14

What is a constant delivery pump

Answer 14

Flow rate dependent on speed of rotation of the gears

Question 15

How does an automatic cut out value work

Answer 15

Works with constant delivery pump
Where he use of pressure will decide it it moves into the reservoir or to the system

Question 16

How does a swash-plate pump work

Answer 16

A spinning pump that takes in fluid and is turned until the sliding shoe and he wish plate causes the piston to push out the pressure

Question 17

What tuns the swash plate pump

Answer 17

Drive shaft

Question 18

What is a hydraulic filter

Answer 18

Keeps fluid contamination free

Question 19

What is pressure relief valve

Answer 19

Protects the system from over pressurisation by having the excess pressure have a spring causing a ball to unseat leading to it going back to the reservoir

Question 20

What is a restrictor valve

Answer 20

Reduces fuel flow by having a one way restrictor that only allows one way flow

Question 21

What is a shuttle valve

Answer 21

Two different supplies that works under two different pressures this means it one fails the other one Picts up

Question 22

How does a hydraulic fuse work

Answer 22

Protects from leaking hydraulic fluid by pressure differences
If the side of the equipment leaks the pressure will no longer be equal leading to the springs slamming shut and closing the normal passageway through the valve

Question 23

What psi does most systems operate at

Answer 23

3000 - 4000

Question 24

If you have a leak in the green reservoir what should you do

Answer 24

Cut off fuel to the engines because the pipe will be longest

Question 25

What is the most important part of the place if a total failure

Answer 25

The rudder

Question 26

What does a ram air turbine do

Answer 26

If a generator fails it pops out the bottom and turns to produce electricity

Question 27

What is an air turbine motor

Answer 27

High pressure bleed through a turbine which powers a hydraulic pump

Question 28

Why do Landing gears conduct static electric

Answer 28

They have a carbon content in the wheels

Question 29

What is the landing gear designed to do

Answer 29

Absorb the loads experienced on the airframe

Question 30

What is the standard landing gear for air transport planes

Answer 30

Tricycle landing gear

Question 31

What do spats do

Answer 31

Make a fixed gear more aerodynamic

Question 32

What is a nose gear

Answer 32

A two wheel landing gear

Question 33

What is a main gear

Answer 33

A two wheel landing gear with reinforcement

Question 34

What is a bogey gear

Answer 34

A four tyre plus landing gear found on the larger jets

Question 35

What absorbs the shock of landing

Answer 35

Shock absorbers

Question 36

What is the shock absorber made up of

Answer 36

The oleo strut The gas acts as a spring The oil dampens the spring action

Question 37

What is the oleo strut made up of

Answer 37

Hydraulic oil (DTD 585) and nitrogen gas

Question 38

What might an overly compressed oleo mean

Answer 38

Low gas pressure Fluid leak

Question 39

Positives of the nose wheel attachment

Answer 39

Much lighter Folds up so when moving it is being locked in Shimmy protection

Question 40

What do down locks do

Answer 40

Ensure that accidental retraction cannot occur

Question 41

What are gear locks

Answer 41

Locks for the landing gear

Question 42

What are micro switches and proximity switches

Answer 42

Made for systems all linking together Micro are mechanical Proximity are electric

Question 43

When is an aircraft getting the most tortional load

Answer 43

When taxiing on the ground at tight angles

Question 44

What are the light sequences for gears

Answer 44

Green- gear locked down Red- gear is unlocked No lights- gear is in the up and locked position

Question 45

What is VLO (velocity landing gear operating)

Answer 45

The higher of the two speeds and allows for gear down ferry fight but watch out for increase fuel consumption

Question 46

What is VLE velocity landing gear extended

Answer 46

The lower speed and takes into account the aerodynamic forces on the gear and door mechanism

Question 47

What is he main emergency gear extension

Answer 47

A gravity or free fall system

Question 48

How does nose steering work in a light aircraft

Answer 48

Ruder pedal Differential braking

Question 49

How does nose steering work in a light twin aircraft

Answer 49

Tiller

Question 50

How does nose steering work in large aircraft

Answer 50

Tiller can steer up to 75 degrees left or right Body gear steering

Question 51

What is nose wheel shimmy

Answer 51

Uncontrolled vibration of the wheel

Question 52

What shimmy prevention is there

Answer 52

Hydraulically locking the steering piston Double nose wheels Self centering springs