Aircraft Fuel System Trivia Quiz!

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  • 1/123 Questions

    In its natural state oxygen is

    • Tasteless, colorless, and odorless
    • Tasteless, volumeless, and odorless
    • Tasteless, colorless, and weightless
    • Volumeless, weightless, and colorless
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About This Quiz

Are you an aircraft engineer and think that you have enough information to tackle this fuel system trivia quiz? One of the things that you should know is what a normal system looks like and how to prevent it from failure. Give it a shot and get to see just how many questions you get correct. All the best as you tackle it!

Aircraft Fuel System Trivia Quiz! - Quiz

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  • 2. 

    What aircraft air conditioning system component is a radiator that cold ram air passes throught in order to cool the hot bleed air from the engines

    • Primary heat exchanger

    • Air cycle machine

    • Water seperator

    • Air cooler

    Correct Answer
    A. Primary heat exchanger
    Explanation
    The primary heat exchanger is a component in the aircraft air conditioning system that functions as a radiator. It allows cold ram air to pass through it, which in turn cools down the hot bleed air from the engines. This process helps in regulating the temperature of the air conditioning system and maintaining a comfortable environment inside the aircraft.

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  • 3. 

    The ability to do work is the definition of

    • Energy

    • Inertia

    • Friction

    • Velocity

    Correct Answer
    A. Energy
    Explanation
    Energy is the correct answer because it refers to the ability to do work. Energy is a fundamental concept in physics and is defined as the capacity to perform physical tasks or to cause changes in the environment. It can exist in various forms such as kinetic, potential, thermal, chemical, and electrical energy. In this context, energy is the most appropriate choice as it directly relates to the ability to perform work.

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  • 4. 

    The arrow stamped on teh body of a fuel system check valve indicates the

    • Direction of free flow

    • Direction of resisted flow

    • Location of the drilled hole in the valve

    • Location of the manufacturer's data block

    Correct Answer
    A. Direction of free flow
    Explanation
    The arrow stamped on the body of a fuel system check valve indicates the direction of free flow. This means that the arrow shows the direction in which the fuel can flow through the valve without any obstruction or resistance. It helps in ensuring that the fuel flows in the correct direction and prevents any backflow or blockage in the system.

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  • 5. 

    Fuel's ability to hold contaiminants in supension is increased with a higher

    • Fuel to air ratio

    • Specific gravity

    • Temperature

    • Viscosity

    Correct Answer
    A. Viscosity
    Explanation
    A higher viscosity of fuel means that it is thicker and more resistant to flow. This increased thickness allows the fuel to hold contaminants in suspension more effectively, preventing them from settling at the bottom of the fuel tank or clogging the fuel system. Therefore, a higher viscosity of fuel increases its ability to hold contaminants in suspension.

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  • 6. 

    After air is drawn into the guide vanes of a centrifugal jet engine compressor, it is subjected to

    • Radial and tangential forces

    • Rotational and tangential forces

    • Rotational and centrifugal forces

    • Tangential and centrifugal forces

    Correct Answer
    A. Rotational and centrifugal forces
    Explanation
    When air is drawn into the guide vanes of a centrifugal jet engine compressor, it undergoes rotational and centrifugal forces. The rotational force is caused by the spinning motion of the compressor, which imparts a circular motion to the air particles. The centrifugal force is a result of this rotation, causing the air particles to move away from the center of rotation and towards the outer edges of the compressor. These forces are essential in compressing the air and increasing its pressure before it enters the combustion chamber.

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  • 7. 

    The two types of oil coolers used in jet engine oil system are air/oil and

    • Fuel/oil

    • Freon/oil

    • Water/oil

    • Hydraulic/oil

    Correct Answer
    A. Fuel/oil
    Explanation
    The correct answer is fuel/oil. In jet engine oil systems, two types of oil coolers are used: air/oil and fuel/oil. The air/oil cooler uses airflow to cool the oil, while the fuel/oil cooler utilizes the cooler fuel to lower the temperature of the oil. Both types of coolers play a crucial role in maintaining the optimal temperature of the oil to ensure proper lubrication and prevent overheating in the jet engine.

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  • 8. 

    At a minimum what should be worn to take an oil sample?

    • Goggles

    • Goggles and gloves

    • Gloves and long sleeves

    • Goggles and long sleeves

    Correct Answer
    A. Goggles and gloves
    Explanation
    To take an oil sample, it is important to wear goggles and gloves at a minimum. Goggles protect the eyes from any potential splashes or spills, while gloves protect the hands from coming into direct contact with the oil, which may contain harmful chemicals or irritants. Wearing both goggles and gloves ensures the safety of the person taking the sample by providing adequate protection for both the eyes and hands.

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  • 9. 

    What tool do you use to ensure alignment and asealing when installing a V-band clamp on air conditioning ducting?

    • Screwdriver

    • Center punch

    • Rawhide mallet

    • Ball been hammer

    Correct Answer
    A. Rawhide mallet
    Explanation
    A rawhide mallet is used to ensure alignment and asealing when installing a V-band clamp on air conditioning ducting. The rawhide material of the mallet provides a soft and non-marring surface that allows for precise adjustments and prevents damage to the clamp or ducting. By using a rawhide mallet, the installer can gently tap the clamp into place, ensuring a tight and secure seal without causing any harm to the components.

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  • 10. 

    "the simultaneous control of tempature, humidity, and air distribution within a space" is the definition of

    • Engine bleed air

    • Air conditioning

    • Pressurization

    • Air control

    Correct Answer
    A. Air conditioning
    Explanation
    Air conditioning refers to the simultaneous control of temperature, humidity, and air distribution within a space. This means that an air conditioning system is responsible for regulating the temperature and humidity levels in a given area, while also ensuring that the air is evenly distributed throughout the space. This definition distinguishes air conditioning from other options such as engine bleed air, pressurization, and air control, which do not encompass all three aspects of temperature, humidity, and air distribution.

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  • 11. 

    The rapid cooling of bleed air causes

    • The air pressure to increase

    • Moisture to condense in the form of fog

    • Ice to form in the secondary heat exchanger

    • A loss of pressure as it exits the air cycle machine compressor

    Correct Answer
    A. Moisture to condense in the form of fog
    Explanation
    The rapid cooling of bleed air causes moisture to condense in the form of fog. When air is rapidly cooled, its capacity to hold moisture decreases, leading to the condensation of water vapor in the air. This condensation forms tiny water droplets that appear as fog.

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  • 12. 

    The low atmospheric pressure found at extremely high altitude can cause a person's blood vessels to

    • Shrink

    • Rupture

    • Contract

    • Collapse

    Correct Answer
    A. Rupture
    Explanation
    At extremely high altitudes, the atmospheric pressure decreases significantly. This low atmospheric pressure can have a detrimental effect on the human body, including the blood vessels. When the atmospheric pressure is low, the pressure inside the blood vessels becomes relatively higher, which can cause them to rupture. This rupture can lead to internal bleeding and other serious health issues. Therefore, the correct answer is "rupture."

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  • 13. 

    A gaseous nitrogen charge is added to a liquid fire extinguishing agent in order to

    • Convert the liquid to a gas upon discharge

    • Expel the agent from the bottle

    • Assist in extinguishing the fire

    • Stabilize the temperature

    Correct Answer
    A. Expel the agent from the bottle
    Explanation
    A gaseous nitrogen charge is added to a liquid fire extinguishing agent in order to expel the agent from the bottle. The pressure from the nitrogen gas builds up inside the bottle, causing the liquid agent to be forced out when the extinguisher is discharged. This helps in effectively delivering the extinguishing agent to the fire, allowing it to reach the flames and suppress them.

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  • 14. 

    Fuel controlled switches normally control circuits that indicate

    • Fuel flow

    • Fuel level

    • Fuel pressure

    • ALL OF THE ABOVE!!!!

    Correct Answer
    A. ALL OF THE ABOVE!!!!
    Explanation
    Fuel controlled switches are designed to control circuits that indicate various aspects related to fuel in a system. This includes monitoring fuel flow, fuel level, and fuel pressure. These switches are crucial in providing accurate information about the fuel status, allowing for efficient operation and maintenance of the fuel system. Therefore, the correct answer is "ALL OF THE ABOVE!!!!" as fuel controlled switches are responsible for controlling circuits that indicate fuel flow, fuel level, and fuel pressure.

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  • 15. 

    A well designed aircraft fuel system will ensure

    • Positive and negative fuel flow

    • Negative fuel flow under all condtions

    • Positive fuel flow under positive conditions

    • Positive and reliable fuel flow under all conditions

    Correct Answer
    A. Positive and reliable fuel flow under all conditions
    Explanation
    A well designed aircraft fuel system should provide a positive and reliable fuel flow under all conditions. This means that the system should consistently deliver fuel to the engine in a steady and dependable manner, regardless of the operating conditions or external factors. This ensures that the aircraft's engines receive the necessary fuel for proper functioning, maintaining the safety and efficiency of the aircraft's operations.

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  • 16. 

    What is the basci purpose of the fuel vent system?

    • Move fuel from tank to tank

    • Pressurize the fuel for transfer

    • Remove residual fuel from the manifolds

    • Prevent fuel tank rupture or collapse

    Correct Answer
    A. Prevent fuel tank rupture or collapse
    Explanation
    The basic purpose of the fuel vent system is to prevent fuel tank rupture or collapse. This system allows air to enter and exit the fuel tank, maintaining a balanced pressure inside the tank. Without a vent system, pressure imbalances could occur, leading to the tank collapsing or rupturing. By preventing these issues, the fuel vent system ensures the safe operation of the fuel tank.

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  • 17. 

    The supply and distribution tubing for aircraft oxygen systems is identified by cellulose tape that is

    • Brown and orange

    • Blue and yellow

    • Green and white

    • Black and red

    Correct Answer
    A. Green and white
    Explanation
    The supply and distribution tubing for aircraft oxygen systems is identified by green and white cellulose tape. This color combination is used to easily differentiate the oxygen system tubing from other types of tubing in the aircraft. The green and white tape helps maintenance personnel and pilots quickly identify and locate the oxygen system components, ensuring that they are properly maintained and serviced.

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  • 18. 

    The disadvantae of a continuous-flow oxygen regulator is that it

    • Wastes oxygen

    • Is unusable below 10,000 feet

    • Is usable only above 20,000 feet

    • Delivers oxygen at varying pressures

    Correct Answer
    A. Wastes oxygen
    Explanation
    A continuous-flow oxygen regulator is a device that delivers a constant flow of oxygen to the user. The disadvantage of this type of regulator is that it wastes oxygen. This means that some of the oxygen being delivered is not being effectively utilized by the user, resulting in a loss of oxygen. This can be a concern, especially in situations where oxygen supply is limited or needs to be conserved.

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  • 19. 

    What lubricant can be used on a beaded channel clamp sleve to ease installation?

    • Soap

    • Water

    • Grease

    • Silicone

    Correct Answer
    A. Water
    Explanation
    Water can be used as a lubricant on a beaded channel clamp sleeve to ease installation. Water acts as a temporary lubricant and helps in reducing friction between the sleeve and the channel, making it easier to slide the sleeve into place. It is a common and easily accessible option for lubrication in such cases.

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  • 20. 

    What is defined as "a depression in the duct wall, where the surface of the material isn't cut or removed but the depression has caused sharp bends or creases in the material?"

    • Minor dent

    • Major dent

    • Scratch

    • Gouge

    Correct Answer
    A. Major dent
    Explanation
    A major dent is defined as a depression in the duct wall where the surface of the material is not cut or removed, but the depression has caused sharp bends or creases in the material. This means that the dent is significant and has caused noticeable damage to the material, potentially affecting its functionality or appearance.

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  • 21. 

    The fire detector, frequently used in fire warning systems, that has a high nickel steel rod located along the centerline of a stainless steel tube assembly is called

    • An electoconductive sensor

    • An iron fireman switch

    • A photoconductive cell

    • A FENWAL switch

    Correct Answer
    A. An iron fireman switch
    Explanation
    An iron fireman switch is a fire detector commonly used in fire warning systems. It consists of a stainless steel tube assembly with a high nickel steel rod located along its centerline. This design allows the iron fireman switch to detect the presence of fire or heat and trigger the appropriate response in the fire warning system.

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  • 22. 

    A Liquid fire extinguishing agent douses a fire by

    • Releasing a fine mist vapor

    • Excluding oxygen from the area

    • Removing nitrogen from the area

    • Dispersing a large amount of liquid

    Correct Answer
    A. Excluding oxygen from the area
    Explanation
    A liquid fire extinguishing agent douses a fire by excluding oxygen from the area. Oxygen is necessary for combustion to occur, so by removing or reducing the oxygen supply, the fire is deprived of its fuel source and is extinguished.

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  • 23. 

    The rotary plug valve can be removed and replaced

    • Without draining the fuel lines or tanks

    • Only if the electric motor is in the OFF position

    • Only after the required fuel lines and tanks are drained

    • Only after removing the valve body and connecting lines

    Correct Answer
    A. Without draining the fuel lines or tanks
    Explanation
    The rotary plug valve can be removed and replaced without draining the fuel lines or tanks because the electric motor needs to be in the OFF position. This implies that the valve can be safely removed and replaced without the risk of fuel leakage or spillage. The option stating "only after the required fuel lines and tanks are drained" is incorrect because it suggests that draining the fuel is necessary, which contradicts the given statement. The other option stating "only after removing the valve body and connecting lines" is also incorrect as it is not mentioned that these steps are required for removal and replacement.

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  • 24. 

    Another name for the disc type valve in a fuel system is

    • Butterfly

    • Swivel vane

    • Sliding gate

    • Swinging disc

    Correct Answer
    A. Butterfly
    Explanation
    The correct answer is butterfly because a disc type valve in a fuel system is commonly referred to as a butterfly valve. This type of valve consists of a circular disc or plate that is positioned in the center of the pipe and rotates to control the flow of fuel. The disc resembles the shape of a butterfly, hence the name.

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  • 25. 

    What prevents a fuel tank from collapsing if an air pressure regulator fails and excessive negative pressrue develops?

    • Quick disconnect valve

    • Fuel level control

    • Low level shutoff valve

    • Pressure/vacuum relief valve

    Correct Answer
    A. Pressure/vacuum relief valve
    Explanation
    The pressure/vacuum relief valve prevents a fuel tank from collapsing if an air pressure regulator fails and excessive negative pressure develops. This valve is designed to release excess pressure or vacuum inside the tank, ensuring that the tank remains at a safe pressure level. By opening when the pressure or vacuum exceeds a certain threshold, the valve prevents the tank from collapsing or being damaged due to the excessive negative pressure.

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  • 26. 

    Air and gases flowing through a jet engine require

    • Low velocity at all times

    • Less velocity exiting than entering

    • Equal velocity entering and exiting

    • Greater velocity exiting than entering

    Correct Answer
    A. Greater velocity exiting than entering
    Explanation
    In a jet engine, air and gases need to be accelerated to create thrust. This acceleration is achieved by increasing the velocity of the air and gases as they pass through the engine. Therefore, the correct answer is that the velocity exiting the jet engine is greater than the velocity entering it. This increase in velocity allows for the generation of thrust, which propels the aircraft forward.

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  • 27. 

    What is the purpose of a front-mounted fan in an axial-flow jet engine compressor?

    • Add thrust and decrease effciency

    • Add air to the engine and decrease effciency

    • Increase thrust and engine rotations per minute

    • Increase thrust and send air through the compressor core rotor

    Correct Answer
    A. Increase thrust and send air through the compressor core rotor
    Explanation
    The purpose of a front-mounted fan in an axial-flow jet engine compressor is to increase thrust and send air through the compressor core rotor. The fan helps to draw in a large amount of air and accelerate it, creating a forward thrust. It also directs the airflow towards the compressor core rotor, which further compresses the air before it enters the combustion chamber. This process increases the overall efficiency and performance of the jet engine.

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  • 28. 

    Engine design helps prevent igniter plug fouling by

    • Splitting the electrode on the plug

    • Directing air around the plug electrode

    • Applying gold plating to the plug electrode

    • Applying ceramic coating on the plug electrode

    Correct Answer
    A. Directing air around the plug electrode
    Explanation
    Directing air around the plug electrode helps prevent igniter plug fouling by increasing airflow and preventing the buildup of carbon deposits. This airflow helps to keep the plug clean and allows for efficient combustion within the engine. By directing air around the plug electrode, any potential fouling or carbon buildup is minimized, ensuring optimal performance and reliability of the engine.

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  • 29. 

    What do you use to create a static seal between two stationary parts in the oil system?

    • Wadding

    • Packing

    • Gasket

    • Filler

    Correct Answer
    A. Gasket
    Explanation
    A gasket is used to create a static seal between two stationary parts in the oil system. It is a mechanical seal that fills the gap between the two parts, preventing leakage of oil or any other fluid. Gaskets are typically made of materials like rubber, silicone, or metal, which are selected based on the specific requirements of the oil system. They provide a reliable and durable seal, ensuring the proper functioning of the system and preventing any potential damage or loss of oil.

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  • 30. 

    The crush-type gasket used in aircraft ducting is made of

    • Fiber and fiberglass

    • Fiberglass and neoprene, or rubber

    • A soft aluminum, or fiber and metal mesh

    • A soft aluminum, and fiber reinforced rubber or plastic

    Correct Answer
    A. A soft aluminum, or fiber and metal mesh
    Explanation
    The crush-type gasket used in aircraft ducting is made of a combination of a soft aluminum and fiber and metal mesh. This combination of materials provides the gasket with flexibility and durability, allowing it to effectively seal the ducting and withstand the high temperatures and pressures experienced in aircraft systems. The soft aluminum provides a malleable and conformable surface, while the fiber and metal mesh add strength and stability to the gasket.

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  • 31. 

    The direct current (DC) voltage supplied to the lights in a photoelectric circuit is pulsed at a rate of

    • 10 Hz

    • 100 Hz

    • 200 Hz

    • 400 Hz

    Correct Answer
    A. 10 Hz
    Explanation
    The correct answer is 10 Hz because in a photoelectric circuit, the direct current (DC) voltage supplied to the lights is pulsed at a rate of 10 Hz. This means that the voltage is being turned on and off 10 times per second. Pulsing the voltage at a specific frequency allows for precise control of the lights and can be used to achieve specific effects or to synchronize with other components in the circuit.

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  • 32. 

    Jet engine tachometer gauges are calibrated in percent of

    • Minimum rotations per minute

    • Maximum torque

    • Minimum torque

    • Maximum RPM

    Correct Answer
    A. Maximum RPM
    Explanation
    Jet engine tachometer gauges are calibrated in percent of maximum RPM because this measurement provides a standardized reference point for monitoring the engine's rotational speed. By calibrating the gauge in terms of maximum RPM, pilots and technicians can easily determine the engine's operating speed relative to its maximum capability. This information is crucial for ensuring the engine is running within safe and efficient parameters, as exceeding the maximum RPM can lead to engine damage or failure. Therefore, calibrating the tachometer in percent of maximum RPM allows for accurate monitoring and control of the engine's rotational speed.

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  • 33. 

    Aircraft engine tempature and pressure as it applies to the bleed air system is determined by the

    • Ambient pressure and ambient temperature

    • Engine throttle setting and ambient altitude

    • Ambient pressure and engine throttle setting

    • Engine throttle setting and ambient temperature

    Correct Answer
    A. Engine throttle setting and ambient temperature
    Explanation
    The temperature and pressure of the aircraft engine in relation to the bleed air system are influenced by the engine throttle setting and the ambient temperature. The engine throttle setting determines the power output of the engine, which affects the temperature and pressure of the air being circulated. Additionally, the ambient temperature, or the temperature of the surrounding environment, also plays a role in determining the temperature and pressure of the air. Therefore, the engine throttle setting and ambient temperature are the factors that determine the aircraft engine temperature and pressure as it applies to the bleed air system.

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  • 34. 

    As bleed air enteres the compressor of the air cycle machine, its pressure is increased. with the increase in pressure, there is also an increase in tempature. which component removes most of the increased temperature?

    • Primary heat exchanger

    • Secondary heat exchanger

    • Air cycle machine bypass valve

    • Air cycle machine expansion turbine

    Correct Answer
    A. Secondary heat exchanger
    Explanation
    The secondary heat exchanger removes most of the increased temperature. As bleed air enters the compressor of the air cycle machine, its pressure is increased, and with the increase in pressure, there is also an increase in temperature. The secondary heat exchanger is responsible for cooling down the air and removing the excess heat generated during the compression process. This helps to maintain the desired temperature and prevent any damage to the system.

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  • 35. 

    Which type of fuel contaiminant can form a red, brown, gray, or black slime in the fuel?

    • Water

    • Sediment

    • Foreign particles

    • Microbial growth

    Correct Answer
    A. Microbial growth
    Explanation
    Microbial growth can form a red, brown, gray, or black slime in the fuel. This is because certain types of bacteria and fungi can thrive in the fuel, leading to the formation of slime. The color of the slime can vary depending on the specific type of microorganisms present. It is important to prevent microbial growth in fuel systems as it can lead to clogged filters, corrosion, and decreased fuel efficiency. Regular fuel treatments and proper storage practices can help prevent microbial growth.

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  • 36. 

    In a jet engine, what meters the fuel for combustion?

    • Pressurizing and dum (P&D) valve

    • Fuel nozzles

    • Fuel Control

    • Fuel pump

    Correct Answer
    A. Fuel Control
    Explanation
    The fuel control in a jet engine is responsible for metering the fuel for combustion. It regulates the flow of fuel to ensure that the correct amount is delivered to the engine for efficient combustion. The fuel control system is designed to maintain the proper fuel-air ratio, allowing the engine to operate at optimal performance levels. By accurately controlling the fuel flow, the fuel control ensures that the engine receives the necessary fuel for combustion while preventing any excess or insufficient fuel from being supplied.

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  • 37. 

    When the turbine wheel absorbs the fuel energy,

    • 50% is used for accesories

    • 60% is used for accesories

    • The energy returns to the compressor

    • The energy operates the anti-ice system

    Correct Answer
    A. The energy returns to the compressor
    Explanation
    When the turbine wheel absorbs the fuel energy, a portion of it is used for accessories and the remaining energy returns to the compressor. This means that after the turbine wheel extracts energy from the fuel, some of it is utilized to power various accessories, while the rest is redirected back to the compressor.

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  • 38. 

    The combustion efficiency of a gas turbine is usually between

    • 60 and 70%

    • 65 and 75%

    • 75 and 95%

    • 95 and 100%

    Correct Answer
    A. 95 and 100%
    Explanation
    The combustion efficiency of a gas turbine refers to the ratio of the actual amount of heat produced during combustion to the maximum amount of heat that could be produced. A combustion efficiency between 95 and 100% indicates that the gas turbine is operating at a very high level of efficiency, with almost all of the fuel being fully burned and converted into useful energy. This range signifies that the turbine is effectively utilizing the fuel and minimizing any wasted energy, resulting in optimal performance and minimal emissions.

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  • 39. 

    Bleed air is usually take from which part of the engine section?

    • Intake

    • Turbine

    • Exhaust

    • Compressor

    Correct Answer
    A. Compressor
    Explanation
    Bleed air is usually taken from the compressor section of the engine. The compressor section is responsible for compressing the incoming air before it enters the combustion chamber. Bleed air is extracted from the compressor at various stages to provide air for various system requirements, such as cabin pressurization, anti-icing, and air conditioning.

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  • 40. 

    What is the purpose of the engine bleed air (EBA) check valves?

    • Prevent the loss of compressed bleed air

    • Maintain balanced airflow from each engine

    • Provide a primary source for compressed bleed air

    • Reduced bleed air pressure when the pressure is too high

    Correct Answer
    A. Prevent the loss of compressed bleed air
    Explanation
    The purpose of the engine bleed air (EBA) check valves is to prevent the loss of compressed bleed air. These valves ensure that the air remains contained within the system and does not escape, which is important for maintaining the proper functioning of various aircraft systems that rely on the compressed bleed air. By preventing the loss of air, the check valves help to ensure that the aircraft's systems receive a consistent and reliable source of compressed bleed air.

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  • 41. 

    What prevents fiberglass fabric ducts from swelling when the aircraft climbs to high altitudes?

    • Thermal compensators

    • Expansion bellows

    • Puckered flaps

    • Vent holes

    Correct Answer
    A. Vent holes
    Explanation
    Vent holes prevent fiberglass fabric ducts from swelling when the aircraft climbs to high altitudes. When the aircraft ascends to high altitudes, the air pressure decreases, causing the air inside the ducts to expand. Without vent holes, this expansion could cause the fiberglass fabric ducts to swell and potentially rupture. However, the presence of vent holes allows the air to escape, relieving the pressure and preventing swelling.

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  • 42. 

    What controls the action of the outflow valve in a fixed-isobaric, single-differential pressurization systems?

    • A jet pump

    • Filtering cabin air

    • The unpressurized range

    • Regulating control chamber pressure

    Correct Answer
    A. Regulating control chamber pressure
    Explanation
    The action of the outflow valve in a fixed-isobaric, single-differential pressurization system is controlled by regulating control chamber pressure. This means that the pressure in the control chamber is adjusted to control the position of the outflow valve and regulate the cabin pressure. By regulating the control chamber pressure, the system maintains a consistent and desired cabin pressure throughout the flight.

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  • 43. 

     in the varible isobaric pressurization system. the manual control valve is used as an alternate when the

    • Safety valve fails

    • Outflow valve fails

    • Pneumatic relay fails

    • Cabin pressure controller fails

    Correct Answer
    A. Cabin pressure controller fails
    Explanation
    In the variable isobaric pressurization system, the cabin pressure controller is responsible for maintaining the desired cabin pressure. If the cabin pressure controller fails, the manual control valve is used as an alternate to manually control the cabin pressure. This ensures that the cabin pressure remains at a safe and comfortable level for the occupants of the aircraft.

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  • 44. 

    The normal conenction for thermal switches in a fire warning system is in series with

    • Each other only

    • The power source and with the warning light

    • Each other and in parallel with the power source

    • The warning light and parallel with each other

    Correct Answer
    A. The warning light and parallel with each other
    Explanation
    In a fire warning system, the thermal switches are connected in parallel with each other and with the warning light. This means that each thermal switch and the warning light are connected to the power source separately. If any of the thermal switches detect a rise in temperature, it will close the circuit and activate the warning light, indicating a potential fire. Having the switches connected in parallel ensures that the warning light will be activated if any of the switches are triggered, providing a reliable and effective fire detection system.

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  • 45. 

    Wing tanks are

    • Bladder-type tanks that conform to vacant cavity within the wing

    • Lightweight, aluminum tanks inserted into empty wing cavities

    • Sealed-off parts of the wing structure

    • Soft, malleable plastic tanks

    Correct Answer
    A. Sealed-off parts of the wing structure
    Explanation
    Wing tanks are sealed-off parts of the wing structure. This means that they are compartments within the wing that are completely closed off from the rest of the aircraft. They are designed to hold fuel or other fluids and are an integral part of the wing's structure. Unlike bladder-type tanks or lightweight aluminum tanks, which are separate entities inserted into the wing, wing tanks are built-in and form a sealed part of the wing itself. They provide stability, balance, and efficient fuel storage for the aircraft.

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  • 46. 

    Some fuel level control valves have a dual float system so that

    • There will be a double safety factor

    • Two tanks can be filled at the same time

    • The tank can be filled to either of the two levels

    • There is capability to fill or empty the tank

    Correct Answer
    A. There will be a double safety factor
    Explanation
    The correct answer is that there will be a double safety factor. This means that the dual float system provides an additional level of safety by having two floats to control the fuel level. If one float fails or malfunctions, the second float can still ensure proper fuel control and prevent overfilling or underfilling of the tank. This redundancy in the system increases the overall safety and reliability of the fuel level control valve.

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  • 47. 

    The most prevalent method of refueling for ground servicing is

    • Nozzle

    • Top-off

    • Single point

    • Over the wing

    Correct Answer
    A. Single point
    Explanation
    The most prevalent method of refueling for ground servicing is the single point method. This method involves using a single refueling point on the aircraft, usually located on the wing or fuselage, to supply fuel. It allows for a faster and more efficient refueling process as it eliminates the need for multiple refueling points and reduces the risk of fuel spills or leaks. Additionally, the single point method is commonly used in commercial aviation as it ensures a consistent and standardized refueling procedure across different aircraft types.

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  • 48. 

    Classification of the fuel leaks is neccessary in order to determine

    • How much fuel is being wasted

    • The type of contaminant that is in the fuel

    • Wether or not they constitute a flight safety hazard

    • Wether or not they constitute an eviromental hazard

    Correct Answer
    A. Wether or not they constitute a flight safety hazard
    Explanation
    The classification of fuel leaks is necessary to determine whether or not they constitute a flight safety hazard. This means that by classifying the fuel leaks, it can be determined if they pose a risk to the safety of the flight. This is important as any potential hazards or risks need to be identified and addressed to ensure the safety of the aircraft and its passengers.

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  • 49. 

    How are fuel leaks categorized?

    • Major and Minor

    • Class 1 through Class 5

    • Class A through Class D

    • Internal and External

    Correct Answer
    A. Class A through Class D
    Explanation
    Fuel leaks are categorized based on their severity and potential risks. Class A through Class D is a commonly used classification system for fuel leaks. Class A refers to the most severe leaks that can cause immediate danger and require immediate action. Class D refers to minor leaks that pose minimal risk and can be addressed at a later time. This classification system helps prioritize and address fuel leaks based on their potential impact on safety and the environment.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 03, 2014
    Quiz Created by
    Specs1
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