11.10 Fuel Systems Flashcards by John Watts

What does the aircraft fuel system deliver to the engine or APU?
A) The correct amount of fuel at the right pressure
B) Electricity
C) Air

A) The correct amount of fuel at the right pressure

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Where are fuel tanks normally located on an aircraft?
A) Within the wings
B) On the tail only
C) In the cockpit

A) Within the wings

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What is the purpose of baffles inside fuel tanks?
A) To resist fuel surging caused by changes in aircraft attitude
B) To increase fuel temperature
C) To decorate the tank interior

A) To resist fuel surging caused by changes in aircraft attitude

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Why do some fuel tanks have jettison valves?
A) To allow fuel to be jettisoned during flight to reduce landing weight
B) To fill tanks faster on the ground
C) To connect fuel tanks together

A) To allow fuel to be jettisoned during flight to reduce landing weight

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What are auxiliary tanks?
A) Additional tanks located in the horizontal stabiliser or cargo compartment
B) Tanks used only for water storage
C) Tanks used for storing oxygen

A) Additional tanks located in the horizontal stabiliser or cargo compartment

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What are trim tanks used for besides storing fuel?
A) To trim the aircraft for balance
B) To power the landing gear
C) To store passengers’ luggage

A) To trim the aircraft for balance

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What materials are rigid aircraft fuel lines often made from?
A) Stainless steel or aluminium alloy
B) Plastic or rubber
C) Wood or copper

A) Stainless steel or aluminium alloy

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Where are stainless steel fuel lines commonly used?
A) Engine compartment and wheel wells
B) Passenger cabin
C) Cockpit windows

A) Engine compartment and wheel wells

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Why must metal fuel lines be electrically bonded and grounded?
A) To safely discharge static electricity generated by fuel flow
B) To improve fuel flow speed
C) To reduce fuel consumption

A) To safely discharge static electricity generated by fuel flow

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What type of fuel do reciprocating engines use?
A) AVGAS (Aviation Gasoline)
B) Jet Fuel
C) Diesel

A) AVGAS (Aviation Gasoline)

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What type of fuel do turbine engines use?
A) Jet Fuel
B) AVGAS
C) Diesel

A) Jet Fuel

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Can AVGAS and jet fuel be mixed?
A) No, mixing different types of fuel is not permitted
B) Yes, mixing is allowed
C) Only in emergencies

A) No, mixing different types of fuel is not permitted

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Which fuel has a higher flash point and is less flammable?
A) Jet fuel
B) AVGAS
C) Both are the same

A) Jet fuel

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Which turbine engine fuel type is the most popular worldwide?
A) Jet A1
B) Jet A
C) Jet B

A) Jet A1

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What is Jet B primarily used for?
A) Cold climates due to better cold-weather performance
B) Hot climates only
C) As a replacement for AVGAS

A) Cold climates due to better cold-weather performance

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What is the density of Jet A and Jet A1 at 15 °C?
A) 0.81 kg/litre
B) 1.00 kg/litre
C) 0.50 kg/litre

A) 0.81 kg/litre

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What is the flashpoint range for Jet A and Jet A1 fuels?
A) 43 °C to 65 °C
B) 10 °C to 30 °C
C) 70 °C to 90 °C

A) 43 °C to 65 °C

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At what temperature does Jet A freeze?
A) –40 °C
B) –47 °C
C) –50 °C

A) –40 °C

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At what temperature does Jet A1 freeze?
A) –47 °C
B) –40 °C
C) –30 °C

A) –47 °C

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What color is AVGAS 100?
A) Green
B) Blue
C) Red

A) Green

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What color is AVGAS 100LL?
A) Blue
B) Green
C) Red

A) Blue

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What are the three types of aircraft fuel tanks?
A) Rigid removable, bladder, integral
B) Metal, plastic, composite
C) Pressurized, vented, sealed

A) Rigid removable, bladder, integral

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What is the purpose of a sump in a fuel tank?
A) To store extra fuel
B) To allow contaminants and water to settle
C) To connect to the engine directly

B) To allow contaminants and water to settle

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What problem can occur if a bladder tank lies wrinkled in the aircraft bay?
A) It can cause fuel leaks
B) It can restrict fuel flow
C) It can lead to chafing and damage

C) It can lead to chafing and damage

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What are aircraft with integral fuel tanks in the wings commonly called? A) Dry wings B) Wet wings C) Bladder wings

B) Wet wings

What do baffle check valves in integral fuel tanks do? A) Allow fuel to move to low inboard sections but stop it moving outboard B) Pump fuel out of the tank C) Filter contaminants from fuel

A) Allow fuel to move to low inboard sections but stop it moving outboard

Where are the most common locations for integral fuel tanks? A) Wings B) Cargo bay C) Engine compartment

A) Wings

In which ATA chapter would you find the Nitrogen Generating System? A) ATA 24 B) ATA 47 C) ATA 29

B) ATA 47

What happens to the oxygen removed from the compressed air in the ASM? A) It is stored in tanks B) It is vented overboard C) It is mixed back with fuel

B) It is vented overboard

What component in the Nitrogen Generating System produces nitrogen-enriched air? A) Heat Exchanger B) Air Separation Module (ASM) C) Fuel Pump

B) Air Separation Module (ASM)

What is the purpose of the nitrogen-enriched air in the fuel tanks? A) To increase fuel efficiency B) To reduce risk of fuel tank explosions C) To cool the fuel

B) To reduce risk of fuel tank explosions

What is the low-flow mode of the Nitrogen Generating System used for? A) Takeoff B) Cruise C) Descent

B) Cruise

During which phase does the Nitrogen Generating System operate in high-flow mode? A) Climb B) Descent C) Taxi

B) Descent

What is the primary difference between the low-flow and high-flow modes? A) The amount of nitrogen produced B) The temperature of the air intake C) The location of the Air Separation Module

A) The amount of nitrogen produced

What is the maximum oxygen content allowed in the fuel tank ullage on landing? A) 21% B) 15% C) 12%

C) 12%

What are the four classifications used to describe an aircraft fuel leak? A) Drip, Stain, Seep, Flood B) Stain, Seep, Heavy seep, Running leak C) Stain, Drip, Heavy drip, Running leak

B) Stain, Seep, Heavy seep, Running leak

What type of fuel leak appears as a small stain less than 3/4 inch (19 mm) in diameter? A) Running leak B) Heavy seep C) Stain

C) Stain

Which fuel leak classification covers an area between 3/4 inch and 1.5 inches (19 to 38 mm) and indicates a minor but visible leak? A) Seep B) Running leak C) Stain

A) Seep

What is the classification for a fuel leak forming an area between 1.5 inches and 4.0 inches (38 to 101 mm) in diameter? A) Running leak B) Heavy seep C) Seep

B) Heavy seep

Which type of fuel leak involves fuel pooling, dripping, and may follow the contour of the aircraft for a long distance? A) Seep B) Running leak C) Stain

B) Running leak

Before entering an integral fuel tank for maintenance, what must be done first? A) Drain all fuel and purge vapours from the tank B) Turn off all aircraft systems C) Remove all baffles inside the tank

A) Drain all fuel and purge vapours from the tank

Who monitors the air supply and the confined space entrant during fuel tank maintenance? A) Maintenance supervisor B) Standby person C) Pilot

B) Standby person

Which types of fuel supply systems are commonly used in aircraft? A) Gravity feed, pressure feed, injection feed B) Gravity feed, electric feed, manual feed C) Pressure feed, suction feed, manual feed

A) Gravity feed, pressure feed, injection feed

How does a gravity fuel feed system deliver fuel to the engine? A) Using electric pumps B) Using the force of gravity C) Using pressurized air

B) Using the force of gravity

On what type of aircraft are gravity feed fuel systems most commonly found? A) Low-wing aircraft B) High-wing aircraft C) Jet aircraft

B) High-wing aircraft

What components are used to provide adequate fuel pressure in low-wing aircraft? A) Fuel injectors only B) Engine-driven and/or electric pump C) Gravity feed lines

B) Engine-driven and/or electric pump

What type of aircraft commonly uses the injection fuel feed system? A) Low-wing, multi-engine aircraft B) High-wing, high-performance single-engine aircraft C) Gliders

B) High-wing, high-performance single-engine aircraft

Large jet aircraft fuel systems are divided into which of the following subsystems? A) Storage, Cooling, Feed, Indicating, Vent B) Storage, Vent, Distribution, Feed, Indicating C) Storage, Vent, Feed, Cooling, Fuel Injection

B) Storage, Vent, Distribution, Feed, Indicating

What is the most common type of fuel pump used on aircraft? A) Hand-operated pump B) Vane-type pump C) Centrifugal pump

C) Centrifugal pump

What are the three most common types of aircraft fuel filters? A) Micron filter, wafer screen filter, plain screen mesh filter B) Centrifugal filter, magnetic filter, mesh filter C) Water separator, oil filter, air filter

A) Micron filter, wafer screen filter, plain screen mesh filter

What are the two major types of weight limits on an aircraft? A) Maximum fuel weight and maximum cargo weight B) Maximum take-off weight and maximum structural landing weight C) Maximum passenger weight and maximum baggage weight

B) Maximum take-off weight and maximum structural landing weight

What is the main reason for having a fuel dumping/jettison system on an aircraft? A) To increase fuel capacity during flight B) To prevent exceeding the aircraft’s maximum landing weight during emergencies C) To improve fuel economy

B) To prevent exceeding the aircraft’s maximum landing weight during emergencies

Why can the jettison system not empty all fuel tanks completely during flight? A) Some tanks are not connected to the jettison system to ensure minimum fuel remains B) The pilot must manually drain the remaining tanks C) The system is designed to only dump fuel from the wing tanks

A) Some tanks are not connected to the jettison system to ensure minimum fuel remains

How is accidental operation of the jettison system usually prevented? A) By requiring two pilots to activate it simultaneously B) By guarding the jettison control switch or switches C) By requiring a special key to unlock the system

B) By guarding the jettison control switch or switches

What is the main purpose of fuel vent systems? A) To pressurize the fuel tanks for increased fuel flow B) To prevent pressure build-up and allow proper fuel flow C) To filter contaminants from the fuel before reaching the engine

B) To prevent pressure build-up and allow proper fuel flow

What is the purpose of surge tanks on large jet aircraft? A) To store extra fuel for long flights B) To contain fuel overflow and prevent spillage C) To pressurize fuel before it reaches the engine

B) To contain fuel overflow and prevent spillage

What is the primary purpose of a fuel drain system? A) To pressurize the fuel for better flow B) To drain water from fuel tanks during maintenance C) To regulate fuel flow between tanks

B) To drain water from fuel tanks during maintenance

How are manually operated drain valves closed? A) Using an external lever B) Automatically by springs C) By activating a solenoid

B) Automatically by springs

What is the purpose of the fuel transfer system in an aircraft? A) To mix fuel additives into the tanks B) To permit movement of fuel between tanks C) To adjust the pressure within the fuel tanks

B) To permit movement of fuel between tanks

What must the flight crew do to use fuel from another tank during flight? A) Open the defuel valve B) Select the cross-feed valves to the ‘OPEN’ position C) Switch off all fuel pumps

B) Select the cross-feed valves to the ‘OPEN’ position

What is the primary purpose of the fuel cross-feed valve? A) To mix fuel additives B) To connect the left and right engine fuel feed manifolds C) To regulate the fuel temperature

B) To connect the left and right engine fuel feed manifolds

What type of fuel quantity system contains no moving parts in the tank units? A) Mechanical type B) Capacitance-type C) Ratiometer type

B) Capacitance-type

What does a capacitor store? A) Fuel B) Electricity C) Pressure

B) Electricity

How do ultrasonic level sensors measure fuel level? A) By measuring fuel temperature B) By measuring the time for sound waves to travel to the fuel surface and back C) By measuring fuel pressure

B) By measuring the time for sound waves to travel to the fuel surface and back

Why is monitoring fuel temperature critical? A) To prevent ice formation in the fuel system B) To adjust cabin pressure C) To control engine speed

A) To prevent ice formation in the fuel system

Where can flight crew see fuel flow to each engine in modern aircraft? A) Engine main display B) Overhead panel C) Outside the aircraft

A) Engine main display

What are the two methods of aircraft refuelling? A) Gravity and vacuum refuelling B) Gravity (overwing) and pressure refuelling C) Pressure and manual refuelling

B) Gravity (overwing) and pressure refuelling

Where can refuelling control panels typically be found on an aircraft? A) Wing leading edge or fuselage B) Inside the engine C) On the landing gear

A) Wing leading edge or fuselage

What are the three modes of pressure refuelling? A) Manual, automatic, override B) Manual, semi-automatic, emergency C) Automatic, manual, emergency

A) Manual, automatic, override

When is override mode used? A) When fuel tanks are full B) When electrical power to refuelling valves is not available C) During normal refuelling

B) When electrical power to refuelling valves is not available

What are the two methods of defuelling an aircraft? A) Gravity and electric B) Pressure and suction C) Manual and automatic

B) Pressure and suction

Which defuelling method is preferred for speed? A) Suction defuelling B) Pressure defuelling C) Gravity defuelling

B) Pressure defuelling

Why is bonding between fuelling equipment and aircraft essential during refuelling? A) To speed up the fuel flow B) To equalize static electricity potential and prevent sparks C) To keep the equipment clean

B) To equalize static electricity potential and prevent sparks

What type of fuel tanks are used to carry fuel that is transferred to maintain longitudinal balance? A) Wing tanks B) Stabiliser trim tanks C) Auxiliary tanks

B) Stabiliser trim tanks

11.10 Fuel Systems Flashcards

(74 cards)