Aircraft Fuel System Trivia 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!
Questions and Answers
- 1.
In its natural state oxygen is
- A.
Tasteless, colorless, and odorless
- B.
Tasteless, volumeless, and odorless
- C.
Tasteless, colorless, and weightless
- D.
Volumeless, weightless, and colorless
Correct Answer
A. Tasteless, colorless, and odorlessExplanation
Oxygen is tasteless, colorless, and odorless in its natural state. This means that it does not have a distinct taste, it cannot be seen, and it does not have a noticeable smell.Rate this question:
-
- 2.
What gaseous oxygen (GOX) system valve type prevents a complete loss of oxygen?
- A.
Filler
- B.
Check
- C.
Shutoff
- D.
Pressure-reducing
Correct Answer
B. CheckExplanation
A check valve is designed to allow flow in only one direction, preventing backflow. In the case of a gaseous oxygen (GOX) system, a check valve would prevent a complete loss of oxygen by ensuring that oxygen can only flow in one direction and not back into the system. This is important for safety reasons, as a complete loss of oxygen could be dangerous or even fatal in certain situations.Rate this question:
-
- 3.
The supply and distribution tubing for aircraft oxygen systems is identified by cellulose tape that is
- A.
Brown and orange
- B.
Blue and yellow
- C.
Green and white
- D.
Black and red
Correct Answer
C. Green and whiteExplanation
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.Rate this question:
-
- 4.
The disadvantae of a continuous-flow oxygen regulator is that it
- A.
Wastes oxygen
- B.
Is unusable below 10,000 feet
- C.
Is usable only above 20,000 feet
- D.
Delivers oxygen at varying pressures
Correct Answer
A. Wastes oxygenExplanation
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.Rate this question:
-
- 5.
What does the molecular sieve oxygen generating system (MSOGS) concentrator supply to the oxygen regulator control panel?
- A.
16 man-minutes of oxygen
- B.
93 percent oxygen-enriched gas
- C.
97 percent nitrogen-enriched gas
- D.
100 percent oxygen-enriched gas
Correct Answer
A. 16 man-minutes of oxygenExplanation
The molecular sieve oxygen generating system (MSOGS) concentrator supplies 16 man-minutes of oxygen to the oxygen regulator control panel.Rate this question:
-
- 6.
Liquid oxygen (LOX) converts to gaseous oxygen (GOx) at an expansion ratio of
- A.
600 to 1
- B.
680 to 1
- C.
800 to 1
- D.
860 to 1
Correct Answer
D. 860 to 1Explanation
Liquid oxygen (LOX) converts to gaseous oxygen (GOx) at an expansion ratio of 860 to 1. This means that when liquid oxygen expands, it increases in volume by a ratio of 860 to 1, resulting in the formation of gaseous oxygen. This expansion occurs due to the increase in temperature and decrease in pressure, causing the liquid oxygen to vaporize and convert into a gas.Rate this question:
-
- 7.
Except during servicing, the liquid oxygen (LOX) system's combination fill, buildup, and vent valve is always in the
- A.
Fill position
- B.
Vent position
- C.
Normal position
- D.
Buildup position
Correct Answer
D. Buildup positionExplanation
The liquid oxygen (LOX) system's combination fill, buildup, and vent valve is always in the buildup position, except during servicing. This position allows the LOX system to accumulate and pressurize the liquid oxygen before it is transferred to the desired location. The buildup position ensures that the system is ready for operation and maintains the necessary pressure for efficient functioning.Rate this question:
-
- 8.
On an Aircraft Liquid Oxygen systems (LOX), the handle on a manually operated buildup and vent valve is designed to prevent
- A.
A slow pressure buildup
- B.
Rapid venting of systems pressure
- C.
LOX system pressure loss during maintencance
- D.
The filler access door from closing in the vent position
Correct Answer
D. The filler access door from closing in the vent positionExplanation
The handle on a manually operated buildup and vent valve is designed to prevent the filler access door from closing in the vent position.Rate this question:
-
- 9.
Bleed air is usually take from which part of the engine section?
- A.
Intake
- B.
Turbine
- C.
Exhaust
- D.
Compressor
Correct Answer
D. CompressorExplanation
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.Rate this question:
-
- 10.
Aircraft engine tempature and pressure as it applies to the bleed air system is determined by the
- A.
Ambient pressure and ambient temperature
- B.
Engine throttle setting and ambient altitude
- C.
Ambient pressure and engine throttle setting
- D.
Engine throttle setting and ambient temperature
Correct Answer
D. Engine throttle setting and ambient temperatureExplanation
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.Rate this question:
-
- 11.
What is the purpose of the engine bleed air (EBA) check valves?
- A.
Prevent the loss of compressed bleed air
- B.
Maintain balanced airflow from each engine
- C.
Provide a primary source for compressed bleed air
- D.
Reduced bleed air pressure when the pressure is too high
Correct Answer
A. Prevent the loss of compressed bleed airExplanation
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.Rate this question:
-
- 12.
What engine bleed air (EBA) comonent prevents loss of air through the engine when it is shutdown?
- A.
Check valve
- B.
Shutoff valve
- C.
Isolation valve
- D.
Crossover valve
Correct Answer
B. Shutoff valveExplanation
The shutoff valve is the component that prevents loss of air through the engine when it is shutdown. This valve is designed to close off the flow of bleed air, effectively sealing the engine and preventing any air from escaping. By shutting off the flow of air, the shutoff valve helps to maintain the integrity of the engine system and prevent any potential leaks or loss of pressure.Rate this question:
-
- 13.
The ducting for high-pressure/high-temperature air-conditioning is usally made of
- A.
Titanium
- B.
Aluminum
- C.
Stainless steel
- D.
Aluminium/nickel alloy
Correct Answer
C. Stainless steelExplanation
Stainless steel is commonly used for ducting in high-pressure/high-temperature air-conditioning systems due to its excellent corrosion resistance, strength, and durability. It can withstand the harsh conditions and high temperatures without deforming or deteriorating, making it a reliable choice for such applications. Additionally, stainless steel has a smooth surface, which helps in reducing air friction and improving airflow efficiency.Rate this question:
-
- 14.
What tool do you use to ensure alignment and asealing when installing a V-band clamp on air conditioning ducting?
- A.
Screwdriver
- B.
Center punch
- C.
Rawhide mallet
- D.
Ball been hammer
Correct Answer
C. Rawhide malletExplanation
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.Rate this question:
-
- 15.
What type of high-pressure/high-temperatuer ducting does nto require a gasket?
- A.
Clamp flange
- B.
Bolted flange
- C.
Beaded flange
- D.
Compressible flange
Correct Answer
D. Compressible flangeExplanation
A compressible flange does not require a gasket because it is designed to create a tight seal by compressing the flange material against the mating surface. This type of flange is typically used in high-pressure and high-temperature applications where a gasket may not be able to withstand the extreme conditions. The compressible flange relies on the elasticity of the material to provide a reliable seal, making it a suitable choice for ducting systems operating under harsh environments.Rate this question:
-
- 16.
What lubricant can be used on a beaded channel clamp sleve to ease installation?
- A.
Soap
- B.
Water
- C.
Grease
- D.
Silicone
Correct Answer
B. WaterExplanation
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.Rate this question:
-
- 17.
The crush-type gasket used in aircraft ducting is made of
- A.
Fiber and fiberglass
- B.
Fiberglass and neoprene, or rubber
- C.
A soft aluminum, or fiber and metal mesh
- D.
A soft aluminum, and fiber reinforced rubber or plastic
Correct Answer
C. A soft aluminum, or fiber and metal meshExplanation
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.Rate this question:
-
- 18.
Expansion joints in bleed air systems are best used for
- A.
Ram air ducting
- B.
A long run of ducting
- C.
A short run of ducting
- D.
Low-temperature/low-pressure ducting
Correct Answer
C. A short run of ductingExplanation
Expansion joints in bleed air systems are best used for a short run of ducting because they allow for the movement and flexibility of the ducting system. A short run of ducting is more likely to experience thermal expansion and contraction, as well as vibrations and movements caused by the flow of air. Expansion joints can absorb these movements and prevent damage to the ducting system. In contrast, a long run of ducting may require other methods, such as expansion loops, to accommodate for expansion and contraction.Rate this question:
-
- 19.
What prevents fiberglass fabric ducts from swelling when the aircraft climbs to high altitudes?
- A.
Thermal compensators
- B.
Expansion bellows
- C.
Puckered flaps
- D.
Vent holes
Correct Answer
D. Vent holesExplanation
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.Rate this question:
-
- 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?"
- A.
Minor dent
- B.
Major dent
- C.
Scratch
- D.
Gouge
Correct Answer
B. Major dentExplanation
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.Rate this question:
-
- 21.
"the simultaneous control of tempature, humidity, and air distribution within a space" is the definition of
- A.
Engine bleed air
- B.
Air conditioning
- C.
Pressurization
- D.
Air control
Correct Answer
B. Air conditioningExplanation
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.Rate this question:
-
- 22.
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
- A.
Primary heat exchanger
- B.
Air cycle machine
- C.
Water seperator
- D.
Air cooler
Correct Answer
A. Primary heat exchangerExplanation
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.Rate this question:
-
- 23.
What aircraft air conditioning system component controls the flow of ram air through the primary heat exchanger?
- A.
Air cycle machine
- B.
Refrigeration bypass valve
- C.
Movable inlet and exit doors
- D.
Primary ram air controller assemblies
Correct Answer
C. Movable inlet and exit doorsExplanation
The movable inlet and exit doors control the flow of ram air through the primary heat exchanger in an aircraft air conditioning system. These doors can be adjusted to regulate the amount of air entering and exiting the heat exchanger, thereby controlling the temperature and airflow in the cabin. By opening or closing these doors, the system can maintain the desired temperature and ensure proper cooling or heating of the air circulated in the aircraft.Rate this question:
-
- 24.
The rapid cooling of bleed air causes
- A.
The air pressure to increase
- B.
Moisture to condense in the form of fog
- C.
Ice to form in the secondary heat exchanger
- D.
A loss of pressure as it exits the air cycle machine compressor
Correct Answer
B. Moisture to condense in the form of fogExplanation
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.Rate this question:
-
- 25.
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?
- A.
Primary heat exchanger
- B.
Secondary heat exchanger
- C.
Air cycle machine bypass valve
- D.
Air cycle machine expansion turbine
Correct Answer
B. Secondary heat exchangerExplanation
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.Rate this question:
-
- 26.
The low atmospheric pressure found at extremely high altitude can cause a person's blood vessels to
- A.
Shrink
- B.
Rupture
- C.
Contract
- D.
Collapse
Correct Answer
B. RuptureExplanation
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."Rate this question:
-
- 27.
What controls the action of the outflow valve in a fixed-isobaric, single-differential pressurization systems?
- A.
A jet pump
- B.
Filtering cabin air
- C.
The unpressurized range
- D.
Regulating control chamber pressure
Correct Answer
D. Regulating control chamber pressureExplanation
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.Rate this question:
-
- 28.
What are the parts of the isobaric section of the cabin pressure regulator
- A.
A diaphragm, fulcrum, and aneroid
- B.
A rocker arm, diaphragm, and fulcrum
- C.
An aneroid, spring, and metering valve
- D.
A spring, metering valve, and rocker arm
Correct Answer
C. An aneroid, spring, and metering valveExplanation
The correct answer is an aneroid, spring, and metering valve. In an isobaric section of the cabin pressure regulator, an aneroid is used to measure the cabin pressure. The spring is responsible for controlling the tension and adjusting the pressure, while the metering valve regulates the flow of air to maintain the desired pressure level.Rate this question:
-
- 29.
What are the components of teh differential section of the cabin pressure regulator?
- A.
A spring, metering valve, and aneroid
- B.
An aneroid, rocker arm, and fulcrum
- C.
A rocker arm, fulcrum, and diaphragm
- D.
A diaphragm, spring, and metering valve
Correct Answer
D. A diaphragm, spring, and metering valveExplanation
The correct answer is a diaphragm, spring, and metering valve. In the differential section of the cabin pressure regulator, these components work together to regulate the cabin pressure. The diaphragm senses the pressure difference between the cabin and the outside environment. The spring provides the necessary force to control the diaphragm's movement. The metering valve adjusts the flow of air to maintain the desired cabin pressure.Rate this question:
-
- 30.
What maintains pressure if the dual-differential cabin pressure regulator fails during flight?
- A.
The outflow valves
- B.
A manual controller
- C.
The cabin altitude selector
- D.
A positive pressure relief valve
Correct Answer
A. The outflow valvesExplanation
The outflow valves maintain pressure if the dual-differential cabin pressure regulator fails during flight. These valves control the flow of air out of the cabin, allowing the pressure inside the cabin to be regulated. If the pressure regulator fails, the outflow valves will still function and can be manually adjusted to maintain the desired cabin pressure.Rate this question:
-
- 31.
What is the purpose of the pneumatic relay in a cabin pressurization system?
- A.
Control the venting cabin pressure
- B.
Control the reference chamber pressure
- C.
Ensure that both outflow valves operate at the same time
- D.
Ensure that the aneroid and diaphragm inlet ports remain open
Correct Answer
C. Ensure that both outflow valves operate at the same timeExplanation
The purpose of the pneumatic relay in a cabin pressurization system is to ensure that both outflow valves operate at the same time. This is important for maintaining the desired cabin pressure and preventing any imbalance between the two valves. By synchronizing the operation of the outflow valves, the pneumatic relay helps to regulate the flow of air in and out of the cabin, thereby maintaining a safe and comfortable cabin environment for the occupants.Rate this question:
-
- 32.
in the varible isobaric pressurization system. the manual control valve is used as an alternate when the
- A.
Safety valve fails
- B.
Outflow valve fails
- C.
Pneumatic relay fails
- D.
Cabin pressure controller fails
Correct Answer
D. Cabin pressure controller failsExplanation
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.Rate this question:
-
- 33.
The normal conenction for thermal switches in a fire warning system is in series with
- A.
Each other only
- B.
The power source and with the warning light
- C.
Each other and in parallel with the power source
- D.
The warning light and parallel with each other
Correct Answer
D. The warning light and parallel with each otherExplanation
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.Rate this question:
-
- 34.
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
- A.
An electoconductive sensor
- B.
An iron fireman switch
- C.
A photoconductive cell
- D.
A FENWAL switch
Correct Answer
B. An iron fireman switchExplanation
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.Rate this question:
-
- 35.
The direct current (DC) voltage supplied to the lights in a photoelectric circuit is pulsed at a rate of
- A.
10 Hz
- B.
100 Hz
- C.
200 Hz
- D.
400 Hz
Correct Answer
A. 10 HzExplanation
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.Rate this question:
-
- 36.
A Liquid fire extinguishing agent douses a fire by
- A.
Releasing a fine mist vapor
- B.
Excluding oxygen from the area
- C.
Removing nitrogen from the area
- D.
Dispersing a large amount of liquid
Correct Answer
B. Excluding oxygen from the areaExplanation
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.Rate this question:
-
- 37.
A gaseous nitrogen charge is added to a liquid fire extinguishing agent in order to
- A.
Convert the liquid to a gas upon discharge
- B.
Expel the agent from the bottle
- C.
Assist in extinguishing the fire
- D.
Stabilize the temperature
Correct Answer
B. Expel the agent from the bottleExplanation
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.Rate this question:
-
- 38.
What liquid-agent fire extinguisher container component holds in both the liquid agent and the nitrogen charge?
- A.
Squib
- B.
Frangible disc
- C.
Bonnet assembly
- D.
Rubber O-ring packing
Correct Answer
B. Frangible discExplanation
The frangible disc is the component of a liquid-agent fire extinguisher container that holds both the liquid agent and the nitrogen charge. The frangible disc is designed to rupture or break when the extinguisher is activated, allowing the liquid agent and the nitrogen charge to mix and be expelled from the container to extinguish the fire.Rate this question:
-
- 39.
In a liquid-agent fire extinguisher container, why is the frangible disc undercut into Pie-shaped sections?
- A.
Break cleanly into small pieces
- B.
Allow undisturbed fluid flow through the system
- C.
Enable the pieces to pass easily through the strainer
- D.
Prevent small pieces from passing through the strainer
Correct Answer
D. Prevent small pieces from passing through the strainerExplanation
The frangible disc is undercut into pie-shaped sections in a liquid-agent fire extinguisher container to prevent small pieces from passing through the strainer. By dividing the disc into sections, it ensures that even if it breaks, the pieces will be large enough to be caught by the strainer and not clog the system. This design allows for undisturbed fluid flow through the system while still effectively filtering out any debris or fragments.Rate this question:
-
- 40.
What is usually located at the lowest point in a fuel tank?
- A.
Stump and drain
- B.
Pump and drain
- C.
Fuel
- D.
Pressure relief valve
Correct Answer
A. Stump and drainExplanation
The correct answer is "stump and drain." In a fuel tank, the stump and drain are typically located at the lowest point. The stump is a small pipe or tube that extends into the tank, while the drain is a valve or plug that allows for the removal of any accumulated water or sediment. This design ensures that any impurities or contaminants settle at the bottom of the tank and can be easily drained out, preventing them from entering the fuel system.Rate this question:
-
- 41.
A bladder-type tank conromgs to the shape of the vacant cavity within the fuselage because it is made out of
- A.
A soft, malleable plastic
- B.
Rubber, or nylon material
- C.
Hardened, pre-formed plastic
- D.
Lightweight, pre-fromed aluminum
Correct Answer
B. Rubber, or nylon materialExplanation
The bladder-type tank conforms to the shape of the vacant cavity within the fuselage because it is made out of rubber or nylon material. These materials are soft and malleable, allowing the tank to easily adjust and fit into the available space. Additionally, rubber and nylon are flexible materials that can stretch and expand, ensuring a snug fit within the fuselage cavity.Rate this question:
-
- 42.
A centrifugal-type aircraft fuel pump may be used
- A.
For boost, transfer, or air refueling operations
- B.
In any area requiring a pump with no moving parts
- C.
To scavange the remaining fuel in low areas of a fuel tank
- D.
When the output volume of the pump must be in direct proportion to its speed
Correct Answer
A. For boost, transfer, or air refueling operationsExplanation
A centrifugal-type aircraft fuel pump can be used for boost, transfer, or air refueling operations because it is capable of delivering fuel at high pressure and flow rates. This type of pump is designed to handle the demands of these operations effectively. It is not mentioned in the explanation that the pump has no moving parts or that it scavenges fuel from low areas of a tank, so these characteristics are not relevant to the given answer. The key point is that the pump is suitable for boost, transfer, or air refueling operations.Rate this question:
-
- 43.
Wing tanks are
- A.
Bladder-type tanks that conform to vacant cavity within the wing
- B.
Lightweight, aluminum tanks inserted into empty wing cavities
- C.
Sealed-off parts of the wing structure
- D.
Soft, malleable plastic tanks
Correct Answer
C. Sealed-off parts of the wing structureExplanation
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.Rate this question:
-
- 44.
What type of fuel pump must have a fuel- and vapor-proof housing?
- A.
Jet
- B.
Ejector
- C.
Top-Mounted centrifugal pump is used when fuel supply is required furing periods of negative gravity conditions
- D.
Centrifugal pump with electrically driven, DC, series-wound motor
Correct Answer
D. Centrifugal pump with electrically driven, DC, series-wound motorExplanation
A centrifugal pump with an electrically driven, DC, series-wound motor must have a fuel- and vapor-proof housing because it is used to pump fuel. The fuel- and vapor-proof housing is necessary to prevent any leakage or escape of fuel or vapors, which could be dangerous and potentially cause a fire or explosion. The housing ensures that the pump is sealed and secure, providing a safe and efficient operation for pumping fuel.Rate this question:
-
- 45.
What kind of centrifugal pump is used when a fuel supply is required during periods of negative gravity conditions?
- A.
Rotary vane
- B.
Top mounted
- C.
Dual impeller
- D.
In line ejector
Correct Answer
C. Dual impellerExplanation
A dual impeller centrifugal pump is used when a fuel supply is required during periods of negative gravity conditions. This type of pump has two impellers, which allows it to generate higher pressure and flow rates compared to a single impeller pump. The dual impeller design ensures that the pump can effectively handle the challenges of negative gravity conditions and maintain a steady fuel supply.Rate this question:
-
- 46.
In a dual-impeller fuel pump what prevents foreign objects from holding the bypass valve open?
- A.
An inlet screen
- B.
An impeller screen
- C.
A one-way check valve
- D.
A two-way check valve
Correct Answer
A. An inlet screenExplanation
An inlet screen prevents foreign objects from holding the bypass valve open in a dual-impeller fuel pump. This screen acts as a filter, allowing only fuel to enter the pump while blocking any debris or foreign objects. By preventing these objects from entering the pump and reaching the bypass valve, the inlet screen ensures that the valve can function properly and close when necessary.Rate this question:
-
- 47.
What air refueling pump components depend on fuel for lubrication ;)?
- A.
Rotors
- B.
Stators
- C.
Bearings
- D.
Impellers
Correct Answer
C. BearingsExplanation
Bearings depend on fuel for lubrication. Bearings are used to reduce friction between moving parts in a pump, allowing them to rotate smoothly. In some air refueling pumps, the bearings are lubricated by the fuel itself, which helps to reduce wear and tear and ensure efficient operation. Without proper lubrication, the bearings can overheat and fail, leading to pump malfunction. Therefore, it is crucial for the bearings in air refueling pumps to have fuel for lubrication.Rate this question:
-
- 48.
What air refueling pump component removes fuel vapors caused by the centrifugal force of the impellers?
- A.
Rotor
- B.
Stator
- C.
Accumulator
- D.
Vapor relief valve
Correct Answer
A. RotorExplanation
The rotor is the component of the air refueling pump that removes fuel vapors caused by the centrifugal force of the impellers. The impellers generate centrifugal force, which causes the fuel vapors to separate from the liquid fuel. The rotor then collects and removes these vapors from the pump, ensuring that only liquid fuel is delivered for refueling purposes. The stator, accumulator, and vapor relief valve do not perform this specific function.Rate this question:
-
- 49.
The arrow stamped on teh body of a fuel system check valve indicates the
- A.
Direction of free flow
- B.
Direction of resisted flow
- C.
Location of the drilled hole in the valve
- D.
Location of the manufacturer's data block
Correct Answer
A. Direction of free flowExplanation
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.Rate this question:
-
- 50.
A pressure-loaded fuel system check valve is used
- A.
When a reverse flow of fuel is desired
- B.
To prevent the pump from overspeeding
- C.
When gravity flow through the vavle is undersirable
- D.
To preventexcessive pressuress when the pump overspeeds
Correct Answer
C. When gravity flow through the vavle is undersirableExplanation
A pressure-loaded fuel system check valve is used when gravity flow through the valve is undesirable. This means that the check valve is designed to prevent fuel from flowing back through the valve due to gravity. This is important because gravity flow can disrupt the proper functioning of the fuel system and lead to issues such as pump overspeeding or excessive pressures. Therefore, the check valve is used to ensure that fuel only flows in the desired direction and to prevent any potential problems caused by gravity flow.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Mar 03, 2014Quiz Created by
Specs1
Back to top