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22 Cards in this Set
- Front
- Back
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What are two reasons prist is added to fuel that is used in turbojet aircraft? |
Kills the bacteria forming in the fiel tank, and acts as an antifreeze agent |
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What are two types of fuel cells that are used in modern aircraft |
Integral and bladder type |
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Why are fuel tanks divided into compartments, or have baffles installed in them? |
To minimize the surge of the fuel as aircraft changes altitude in flight |
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What is meant by an integral fuel cell? |
The structure of the aircraft itself is the fuel tank. |
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Where are fuel system strainers located? |
One at the tank outlet and the main strain is usually at the lowest point between the fuel outlet and the inlet of the metering device of the fuel system. |
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What are three uses of a centrifugal booster pump that is installed in an aircraft fuel tank? |
To pressurize the fuel to start the engine, prevent vapor lock at high altitude, and transfer fuel between the tanks |
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What is meant by a compensated engine driven fuel pump? |
A fuel pump whose pressure relief valve is calibrated to maintain a constant amount of pressure higher than the pressure of the air that enters the carburetor |
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Why do engine-driven fuel pumps have a bypass valve in them? |
To allow fuel to flow around the fuel pump mechanism for starting the aircraft and in the event that the fuel pump should fail |
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Why must an aircraft fuel valve have a detent in it's operating mechanism? |
To give the pilot a positive indication by feel when the selector is on the ON or OFF position |
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What characteristic of the fuel is measured with the mass flow fuel meter that is used in turbine engine aircraft? |
The density of the fuel |
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What is used as a flowmeter for fuel injected, horizontally opposed aircraft engine? |
Pressure gauges that measure the pressure drop across the injector nozzles across the engine |
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What is meant by a cross-feed system in an aircraft fuel system? |
System that allows fuel to flow from any tank to any engine |
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Why do some aircraft have provisions for jettisoning fuel in flight? |
To allow for fuel dumping to reduce aircraft weight for emergency landing |
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What must be done to a welded fuel tank before it can be repaired by welding? |
Purge all the fuel fume from the tank by flowing steam through the tank or soaking it with boiling water, or by chemically neutralizing the fumes |
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What safety precautions must be taken before a person enters the fuel cell of a large aircraft? |
A person entering the fuel cell must be putting on the appropriate safety equipment, fuel tank must be purged of all the fumes, and a person must be on standby outside of the cell |
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What is meant by a single-point fueling system? |
A System in which fuel is pumped into the aircraft through an underwing fueling port, going into the manifold and to the correct tank selected at the fueling station |
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What gas is used to purge a tank from all fuel vapors? |
Nitrogen or carbon dioxide |
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Why do turbojet aircraft normally have fuel temperature indicators? |
Because they operate at attitudes that the moisture can precipitate out of the fuel and freeze on the filters shutting off the fuel flow to the engines. The temperature indicators help to maintain the temperature above freezing with the help of fuel heaters |
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How is a fuel leak indicated on a reciprocating engine powered aircraft? |
By the dye color of the fuel that stains the area of a leak |
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What is the purpose of a drip gauge in a fuel tank of a large aircraft? |
It allows the mechanic to check the fuel level in the tank from the bottom of the tank |
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Want safety precautions should be taken before an aircraft is defueled? |
Ensure proper location of the fuel truck, aircraft should be electrically grounded and all electrical power except the power source needed for the defueling should be turned off, and the fuel stored in the proper truck or other container |
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What markings must appear near the filler opening of the fuel tanks on the reciprocating engine powered aircraft and on the turbine powered aircraft? |
Reciprocating engine "FUEL" and the proper grade of fuel. Turbine engine Aircraft "FUEL", permissible fuel designations, Maximum permissible fueling or defueling supply pressure |
