11.10 Flashcards
Where are auxiliary tanks kept
Horiz stab and cargo
What are trim tanks
Tanks used for storing feuding g and trimming ac by moving the fuel around
What are rigid lines made of
Stainless steel or alluminium alloy
Where area flexible hoses used
In places prone to vibration
Where area flexible hoses used
In places prone to vibration
Where at stainless steel lines used
Engine prone to heat, debris or abrasion
What are two types of fuel
AVGAS
JET FEUL
How’s AVGAS made.
Carrying out fractional distillation on crude oil
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
What’s jet B freezing point
-50
What’s the density of jet a and jet a1
0.81 kg/l of 15 c
What colour is 100LL AVGAS
Blue
What colour are 100/130 octane fuels
Green
What colour is a 82UL AVGAS
Purple
What colour is a 115/145 AVGAS
Purple
What are rigid tanks made of
Terneplate (tin/lead alloy)
3003 and 5052 aluminium alloy or stainless steel
Process of NGS ans what NGS stands for
Nitrogen generating system
Intake
Pre cooling
Filtration
Separation in ASM
Distribution
Venting
What period of time is needed to monitor the surface area of collected fuel from a tank
30 mins
What size is a fuel stain
3/4 inch in diameter
What size is a fuel seep
What size is a heavy seeps
3/4-1.5inch
1.5-4inch
What regulation is in place relating to fuel tank safety
SFAR 88
What does CDCCL stand for
Critical design control configuration limits
What are the four primary causes which can result in ignition of fuel vapours
Electrical arcs
Filament heating
Friction sparks
Hot surface ignition
What are the four primary causes which can result in ignition of fuel vapours
Electrical arcs
Filament heating
Friction sparks
Hot surface ignition
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
1
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
