Questions and Answers of Fundamentals Of Aerodynamics

A common geometry used to lock a landing gear in the down position involves a collapsible __________________ that is extended and held in an over center position through the use of a locking link.
Large, heavy aircraft require the use of __________________ brakes.
Aircraft __________________ support the entire weight of the aircraft during taxi, takeoff, and landing.
A __________________ is a flat, circular, high strength steel, non-rotating plate notched on the inside circumference to fit over the stator drive sleeves or torque tube spines.
A __________________ wheel half bolt is grounds for removal, and a thorough inspection of the wheel halves.
Power brake systems on large aircraft use the __________________ as a source of power.
The majority of the rudder/brake pedal feel is supplied by the brake control or brake __________________ in a power brake system.
The presence of air in the brake system fluid causes the brake pedal to feel __________________.
Brake __________________ are simple devices that use the application of force over different sized pistons to reduce pressure.
__________________ pressure bleeding is not an option for power brakes; the air trapped in the brake system would be forced into the main hydraulic system, which should operate without air in the
Three main components of pst brake antiskid systems are __________________, __________________ and a __________________.
Many brakes use __________________ in the seal groove to support the O-ring seals and reduce the tendency of the seal to extrude into the space which it is meant to seal.
Antiskid control valves are fast-acting, __________________ controlled hydraulic valves that respond to the input from the antiskid control unit.
Tire __________________ are reinforcing layers of fabric encased in rubber that are laid into the tire to provide strength.
Auto braking is activated by __________________.
The main function of an aircraft tire sidewall is __________________.
Evenly worn tread is a sign of __________________.
A wheel half mating surface O-ring should be __________________ and in good condition to ensure it seals the wheel for the entire life of the tire.
An aircraft tire and wheel assembly, especially a high pressure assembly that has been damaged or overheated, should be treated as though it may __________________.
__________________ is the main result of an imbalanced tire and wheel assembly.
The effective cost of a tire over its life can be reduced by having the tread __________________ while the carcass is still sound and injuries are within repairable limits.
__________________ is caused when water builds up in front of a tire and provides a surface for the tire to run on so that contact with the runway surface is lost.
Another name for a “navigation light” is a __________________ light.
A light that illuminates the leading edge of the wing is used to observe __________________ as well as the general condition in this area during flight.
A __________________ navigation light is always mounted on the extreme tip of the right wing.
Cabin lighting in normal situations is typically powered by __________________ current.
A rotating light on the exterior of an aircraft is a(n) __________________ light.
Cargo compartment lighting is controlled from __________________.
Typically, aircraft have __________________ lights because landing lights are too bright and focused at an angle beneficial for seeing the runway from the air.
Cabin exit emergency lights often contain integral __________________.
The atmosphere of the earth contains about _______ % oxygen.
When __________________ is ignited, it produces oxygen as it burns.
What are two ways the negative effects of reduced atmospheric pressure at flight altitudes forcing less oxygen into the blood can be overcome?
Built-in oxygen systems contain __________________ designed to refill gaseous oxygen cylinders while they are in place.
Pure oxygen combines violently with __________________, which creates a significant hazard when handling these materials in close proximity to each other.
__________________ has a significant effect on the pressure of gaseous oxygen.
To ensure continued serviceability, oxygen cylinders must be __________________ periodically.
Transport category aircraft use a more elaborate, built-in __________________ oxygen system as a backup system to cabin pressurization
Built-in __________________ gaseous oxygen systems accomplish the final flow rate to an individual user station through the use of a calibrated orifice in each mask.
An oxygen __________________ usually consists of a lightweight object, or apparatus, that is moved by the oxygen stream.
When oxygen is delivered only as the user inhales, it is known as a __________________ system.
To purge an oxygen system, pure __________________ is used.
Two types of oxygen regulators for flight crew use on jet transport aircraft are __________________ and __________________.
Oxygen fittings should be unthreaded ________ to allow any residual pressure to dissipate.
High-pressure oxygen distribution lines are usually made from __________________.
Detection of leaks should be performed with __________________.
Twin-engine aircraft vacuum systems contain an __________________ on each engine.
__________________-stage compressor bleed air normally supplies the bulk of the pneumatic system demand.
The pressure developed in a high pressure pneumatic system is approximately ______ psi.
A __________________ is located in each section of the pneumatic manifold separated by an isolation or shutoff valve.
When high pressure pneumatic air or nitrogen is used to move hydraulic fluid to an actuator, it is called __________________.
Pneumatic manifold __________________ is a key parameter monitored on the flight deck.
The __________________ contains the control valves that are operated to supply the systems that require pneumatic power.
Pneumatic power may be used to back-up hydraulic system components without loss of performance by turning a __________________ pump.
__________________ inside the potable water tank(s) pushes the water through distribution lines to the lavatories and galleys.
__________________ are commonly used to prevent odors from backing up into the lavatory.
What is used to heated potable water on passenger aircraft?
Waste water drain masts are heated either __________________ or with __________________.
The fill valve handle located on the water service panel must be __________________ for flight.
Vacuum waste systems remove waste from the toilet with __________________ and deposits it in a waste holding tank.
Galley and lavatory units are usually built in such a way as to allow any spills and leaks to drain through __________________.
Waterproof flooring, built in catch basins and drains help reduce __________________ by controlling where water can flow.
The __________________ is the main processing unit for an on board maintenance system.
An aircraft's __________________ provides a means to upload data to, and download data from, the on board maintenance system.
On an Airbus 330, the CMCs are controlled by __________________ on the flight deck.
Many aircraft have __________________ to print out paper copies of reports from the on board maintenance system, as well as other documents.
The information gathered by central maintenance computers can be relayed to the ground through the __________________ system.
Structure monitoring is also known as __________________ monitoring.
The individual system BITE circuits are connected to the CMC by a __________________.
The fatigue critical structure (FCS) monitoring process is accomplished by performing __________________.
Aircraft with IMA can realize reductions in the bulk and __________________ of their avionics systems?
The wires inside the braided shield of an ARINC 429 data bus are referred to as a __________________.
The use of __________________ indicators saves space and weight, and it streamlines pilot workload by reducing the number of indicators that must be scanned during flight.
The __________________ uses the same computer processors for many different purposes.
IMA aircraft are typically __________________ fault-tolerant than traditional aircraft.
__________________ include input and output devices and data bus wiring.
The use of digital data buses __________________ the amount of wiring used in an aircraft.
Display units (DUs) use __________________ to select the particular type of display desired.
A __________________ is used by flight attendants, pilots, and passengers. Typical user interfaces for the system are flight attendant panels, cabin handsets, cockpit handsets, and flight attendant
To connect with the external networks, aircraft use a __________________ that is connected to dedicated radio transmitting and receiving equipment.
A __________________ is essentially a computer Local Area Network (LAN) within the aircraft, one that can interface with external networks.
Passenger briefings and announcement can be stored in the __________________.
On a Boeing 777, the cabin system management unit contains the __________________ of the cabin services system.
Cabin entry and exit door status is monitored by the __________________.
When an inflight entertainment computer is called upon to send out a large number of different data streams to various passenger seats, all at the same time, a process called __________________ is
Examples are aircraft general information systems include: flight deck information systems, maintenance information systems, and __________________ information systems.
Maintenance crews use maintenance manuals, illustrated parts catalogs, wiring diagram manuals, service bulletins, and other technical data stored in the __________________.
An electronic flight bag (EFB) is part of the __________________ information system.
A __________________ computer cab be used to access electronically stored maintenance information of the aircraft.
On a 777 equipped with the EFB, the system displays information on __________________ that are installed on the flight deck.
Passenger cabin information systems provide access to an electronic version of the flight attendants' __________________.
A water hose is connected to a water nozzle. The inner diameter of the hose inlet is \(10 \mathrm{~mm}\), and the diameter of the nozzle outlet is \(2.5 \mathrm{~mm}\). The water flow rate is \(0.5
A level airflow, along the streamline, \(v_{1}=45 \mathrm{~m} / \mathrm{s}, p_{1}=1.03 \times 10^{5} \mathrm{~Pa}\), \(p_{d 1}=1250 \mathrm{~Pa}\), and \(v_{2}=32 \mathrm{~m} / \mathrm{s}\). Find
A flowrate of lubricant oil is \(5 \mathrm{~kg} / \mathrm{s}\) passing through a Venturi tube. The ratio of areas of the Venturi tube is \(0.005 \mathrm{~m}^{2} /0.002 \mathrm{~m}^{2}\). The density
Air flows at \(60 \mathrm{~m} / \mathrm{s}\) at the inlet of a tunnel, where \(A_{1}=0.5 \mathrm{~m}^{2}\) under sea level conditions. At the exit of the tunnel, the area \(A_{2}=0.2
Find the regime of the boundary layer at the location of \(0.1 \mathrm{~m}\) from the leading edge of an aerofoil, if the airspeed is \(80 \mathrm{~ms}^{-1}\), and air condition is at that of sea
Is it correct to say that an object with a smooth surface produces very low form drag?
Separation can take place in the boundary layer on a surface or along a flow stream around an object.a. What is boundary-layer separation?b. Why does the turbulent boundary layer produce a higher
Aerofoils NACA3306 and NACA2412: which of them should have relatively higher lift coefficient?
What type of airflow is over a finite wing?

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