11.10 Flashcards by Lewis Young

Where are auxiliary tanks kept

Horiz stab and cargo

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What are trim tanks

Tanks used for storing feuding g and trimming ac by moving the fuel around

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What are rigid lines made of

Stainless steel or alluminium alloy

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Where area flexible hoses used

In places prone to vibration

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Where area flexible hoses used

In places prone to vibration

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Where at stainless steel lines used

Engine prone to heat, debris or abrasion

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What are two types of fuel

AVGAS
JET FEUL

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How’s AVGAS made.

Carrying out fractional distillation on crude oil

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What’s the flash points and freezer points for jet a or jet a1

Flash= both are between 43-65 degrees celcius

Freeze= jet a = -40
Jet a1= -47

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What’s jet B freezing point

-50

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What’s the density of jet a and jet a1

0.81 kg/l of 15 c

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What colour is 100LL AVGAS

Blue

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What colour are 100/130 octane fuels

Green

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What colour is a 82UL AVGAS

Purple

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What colour is a 115/145 AVGAS

Purple

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What are rigid tanks made of

Terneplate (tin/lead alloy)

3003 and 5052 aluminium alloy or stainless steel

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Process of NGS ans what NGS stands for

Nitrogen generating system

Intake

Pre cooling

Filtration

Separation in ASM

Distribution

Venting

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What period of time is needed to monitor the surface area of collected fuel from a tank

30 mins

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What size is a fuel stain

3/4 inch in diameter

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What size is a fuel seep

What size is a heavy seeps

3/4-1.5inch

1.5-4inch

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What regulation is in place relating to fuel tank safety

SFAR 88

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What does CDCCL stand for

Critical design control configuration limits

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What are the four primary causes which can result in ignition of fuel vapours

Electrical arcs

Filament heating

Friction sparks

Hot surface ignition

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What are the four primary causes which can result in ignition of fuel vapours

Electrical arcs

Filament heating

Friction sparks

Hot surface ignition

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What are the two team members involved in a feul tank entry team

Confined space entry Standby person

What equipments required for a fuel tank entry

Two separate filtered air supplies with a minimum supply of 170 l/min One for the confined space entrant’s use – primary rig One for the standby person’s use – standby rig Face mask respirator for each person

What’s done to ensure that the feul tanks feeding the engine are both equal pressure

Vented to each other

What type of ac cannot use gravity to feed the feul to the engines

Low wing

What fuel system do most high wing high performance ac use

Injection fuel feed

What’s one disadvantage of hand operated pumps

It requires a fuel line to run from he cockpit to the pump

What do vane type fuel pumps have in order to prevent the pump from providing more fuel than necessary to the engine

A adjustable pressure relief compinent

What’s the most common fuel pimp used

Centrifugal

What does always maintaining a fuel supply to the pump inlet ensure on a ejector or centrifugal pump

That the pump doesn’t cavitate and the pumps cooled by the fuel

What fuel filter has the best filtering action and what size particles can it catch

Micron filter 10-25 microns

What’s an issue of a micron filter

Susceptible for clogging so need a bypass

What two major weight limits do aircraft have

The maximum take off weight The maximum structural landing weight

What two major weight limits do aircraft have Which ones usually lower

The maximum take off weight The maximum structural landing weight - Lower

How’s the jettison system constructed to save weight

Lines Sharing with refuelling manifold

What are surge tanks used for

Collecting overflow feul NOT STORING

What are surge tanks used for

Collecting overflow feul NOT STORING

What do flapper valves do

Prevent fuel from travelling outboard of wing during manoeuvre

What do flapper valves do

Prevent fuel from travelling outboard of wing during manoeuvre

When can fuel defuel valves be operated

On ground only

When can fuel defuel valves be operated

On ground only

What power does the fuel cross feed valve operate on

28 volts dc

How many fuel flow indicators are there per engine

What advantage does a capacitance type quantity system have

Contain no moving parts in the tank units

Where are variable transmitters installed in the fuel tanks

In the tank and run from top to bottom of tank

Where are variable transmitters installed in the fuel tanks

In the tank and run from top to bottom of tank

What 3 factors affect the amount of electricity stored in a capacitor

The area of its plates The distance between the plates The dielectric constant of the material separating the plates

What 3 factors affect the amount of electricity stored in a capacitor

The area of its plates The distance between the plates The dielectric constant of the material separating the plates

How does a ultrasonic type level sensor measure fuel level

They’re fitted to the top of the fuel tank and they measure the distance from of the sensor from the fuel to determine the amount

How’s all the inputs from a feul selector panel control the engines

Using booster pumps and cross feed switches

What does a dim light indicate on a valve in transition indicator light Bright light No light

Dim- abnormal flight conditions Bright - transit No- normal flight condit

Where’s the refuelling panel located

Wing leading edge

Where are refuelling couplings located

Underside of wings

What does the refuelling coupling have to prevent leaking

A spring loaded check valve

What needs to be calculate before refuelling in manual mode

Fuel distribution

How are solenoid operated refuelling valves made fail safe

They close when powers disconnected

What’s the output pressure of the boost pump and what does this allow

Fast defeuling 25-50 psi

What’s the min suction required for suction defueki g from the van

10-15

What’s a major disadvantage and a major advantage for suction defuellimg

Disadvantage- it’s hard to Defeul one tank without defuelimg the others too Advantage- can be done without ac power

How far should no smoking signs be positioned from a refuelling zone

15m

How large should the refuelling zone be

6m min

What extinguishers should be used for a fuel fire

CO2 or foam

What extinguishers should be used for a fuel fire

CO2 or foam

What’s the max resistance between the binding clip and fuelling system framework

25 ohms

What’s the disadvantage of using elevator trim to compensate for nose down attitude caused by the c of g moving due to fuel consumption

Increased drag so more fuel consumption