AS 356 Exam 3
The function of a accumulator in an aircraft hydraulic system is to
1. absorb sudden pressure drops during the system demand changes 2. ensure that the pressure remains the same during pressure surges
Most modern aircraft wheels have ___ main parts.
2
The carcass piles of a radial tire are laid at which angle?
90 degrees
One major benefit go using pure aluminum in aircraft construction is that is does not corrode.
Agree
A visible and permanent deformity under the wing or on the horizontal stabilizer is a normal condition and not a threat to the airworthiness of the aircraft.
Disagree
A hydraulic fuse is used to:
Ensure no hydraulic fluid is lost in the event a line breaks
The principle operational advantage of using nitrogen to service the tires of the aircraft is:
It doesn't expand and contracts easily with temp changes
Which aircraft fuselage design method requires the most internal longitudinal structural members to carry stresses and structural loads?
Semi-monocoque
The primary function of a hydraulic reservoir is to:
Store the hydraulic fluid for normal operation
A multi disc, high capacity aircraft brake system is typically employed on which of the following?
Transport category aircraft
A _____ is capable of supplying some amount of hydraulic system pressure when the aircraft's powered hydraulic pumps are not operating or is the aircraft is shutdown.
accumulator
Chine landing tires are used exclusively on
aircraft nose wheels with turbine engines mounted on the fuselage
What is the purpose of a relic valve?
allow dangerous pressure that has built up to be released
On large aircraft with their turbine engines and deicing boots, a common source of pneumatic pressure for operation of the deicing boots is the
bleed air
A balanced hydraulic actuator has/or
can be used in conjunction with an autopilot servo.
A tire which is over inflated will show wear on what part of the tire
center tread surface
Glaze ice is aka
clear ice
Tire inflation should always be checked when the tire is at
cold/ ambient temperature
Which of the following is a primary airframe stress?
compression and tension
All modern aircraft tires have tubes inside the tires
disagree
Corrosion is an
electro -chemical process
Flight control which controls pitch(yaw) is the
elevator(rudder)
The purpose of the stall step on the leading edge of the wing is to
ensure the inner part of the wing will stall before the tip stalls
A fusible plug in a wheel assembly protects against excessive pressure if the wheel assemble is exposed to
excessive heat pressure
The presence of a crack in the skin of an aircraft or structural component usually indicates____has occurred
excessive stress
Bias tires offer longer tread life, less rolling resistance and higher gas mileage
false
In an aircraft built with longhorns, it will have
four to eight max
Always approach a hot/ burning tire/wheel assembly from the
front or back
A compression stress load on the under side of an aircraft wing would most commonly be associated with
hard landings
Aircraft brake systems slow the airplane down by exchanging kinetic energy from the motion and the weight of the into ____energy
heat/thermal
Tire pressure will be abnormally ____ for a wheel/ tire assembly that is very hot
higher
The most common and desirable materials used to service landing gear shock(oleo) struts to proper inflation levels is/are
hydraulic fluid/ oil and air or N2
A dent in the aircraft stressed skin will most adversely affect an aircraft with this type of fuselage construction
monocoque
An aircraft with stressed skin would be usually be of this design
monocoque
The most common seal used in today's hydraulic system is the
o ring
A constant displacement hydraulic pump must have a ____ in the system
pressure regulator
The most important thing to achieve maximum service life from aircraft tires is
proper inflation
The color of the hydraulic fluid that is the most flammable is
red
A modern transport category (pressurized) aircraft will have this type of construction
semi monocoque
The name of the structural members in a wing with carry the major in-flight loads are
spars.
Hydroplane formula
square root of tire pressure x 9
Besides maintaining goof visibility, an added benefit of electrically heated windshields in high performance aircraft is
that it doesn't break into pieces but is instead flexible
What physical characteristics makes a hydraulic actuator a double balanced actuator?
the amount of work that can be accomplished in both dirrections
The primary difference between hydraulics and pneumatics is
the type of medium used in the lines
The component which prevents a landing gear strut's inner and or outer barrels from rotating(castering) and contacting/ banging into each other when the strut is fully extended is a/an
torsion (or torque) link
An aircraft with a conventional gear configuration will have
two main landing gear wheel assemblies under the empennage.
If an aircraft is equipped with vortex generators, they'd be located on the
upper surfaces of lift producing surfaces
An aircraft with a cantilever design
will not have why external support
What items on transport category aircraft are almost always "anti iced"?
windshields, turbine engine, pitot tube
Alcohol and/or glycol mixture can be used to anti ice which items on a plane?
wings, empennage, leading edges and propellers